Add RESTART command for master and slaves via ESP-NOW.

UART RESTART (client_id 0 = local reboot, >0 = unicast); dashboard and CLI hooks; delayed esp_restart after response.

Co-authored-by: Cursor <cursoragent@cursor.com>

goTool/README.md

@@ -31,6 +31,7 @@ go run . -port /dev/ttyUSB0 clients
 | `ota-progress` | 21 | Query per-slave ESP-NOW OTA progress on the master (`-client N`, default all) |
 | `led-ring` | 8 | LED ring: `-mode clear\|progress\|digit\|blink\|find-me`, … |
 | `find-me` | 22 | Locate pod (`-client 0` master, `>0` slave via ESP-NOW) |
+| `restart` | 23 | Reboot master or slave (`-client 0` / `>0`) |
 
 `clients` requires slaves to have responded to master discover broadcasts first.
 
@@ -73,7 +74,7 @@ The dashboard can configure nodes using the same UART commands as the CLI:
 | Alle Slaves | per-slave ESP-NOW (Master bleibt unverändert; CLI `-all` setzt auch den Master) |
 | Unicast test | `unicast-test -client ID` |
 
-HTTP API (used by the web UI): `GET/POST /api/deadzone`, `POST /api/unicast-test`, `POST /api/find-me`, `POST /api/ota` (multipart field `firmware`, max 2 MiB).
+HTTP API (used by the web UI): `GET/POST /api/deadzone`, `POST /api/unicast-test`, `POST /api/find-me`, `POST /api/restart`, `POST /api/ota` (multipart field `firmware`, max 2 MiB).
 
 | UI / API | Behaviour |
 |----------|-----------|

goTool/api_serve.go

@@ -50,6 +50,16 @@ type findMeAPIResponse struct {
 	Error    string `json:"error,omitempty"`
 }
 
+type restartAPIRequest struct {
+	ClientID uint32 `json:"client_id"`
+}
+
+type restartAPIResponse struct {
+	Success  bool   `json:"success"`
+	ClientID uint32 `json:"client_id,omitempty"`
+	Error    string `json:"error,omitempty"`
+}
+
 type otaAPIResponse struct {
 	Success       bool   `json:"success"`
 	BytesWritten  uint32 `json:"bytes_written,omitempty"`
@@ -82,6 +92,13 @@ func mountServeAPI(mux *http.ServeMux, link *managedSerial, hub *wsHub) {
 		}
 		serveFindMe(w, r, link)
 	})
+	mux.HandleFunc("/api/restart", func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodPost {
+			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+			return
+		}
+		serveRestart(w, r, link)
+	})
 	mux.HandleFunc("/api/ota", func(w http.ResponseWriter, r *http.Request) {
 		if r.Method != http.MethodPost {
 			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
@@ -233,6 +250,22 @@ func applyDeadzoneToSlaves(link *managedSerial, deadzone uint32) (uint32, error)
 	return updated, nil
 }
 
+func serveRestart(w http.ResponseWriter, r *http.Request, link *managedSerial) {
+	var body restartAPIRequest
+	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+		writeJSON(w, http.StatusBadRequest, restartAPIResponse{Error: "invalid JSON"})
+		return
+	}
+	if err := link.Restart(body.ClientID); err != nil {
+		writeJSON(w, http.StatusServiceUnavailable, restartAPIResponse{
+			ClientID: body.ClientID,
+			Error:    err.Error(),
+		})
+		return
+	}
+	writeJSON(w, http.StatusOK, restartAPIResponse{Success: true, ClientID: body.ClientID})
+}
+
 func serveFindMe(w http.ResponseWriter, r *http.Request, link *managedSerial) {
 	var body findMeAPIRequest
 	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {

goTool/client_api.go

@@ -178,6 +178,12 @@ func (m *managedSerial) FindMe(clientID uint32) error {
 	})
 }
 
+func (m *managedSerial) Restart(clientID uint32) error {
+	return m.withPort(func(sp *serialPort) error {
+		return runRestartClient(sp, clientID)
+	})
+}
+
 func (s *serialPort) ledRingProgress(req *pb.LedRingProgressRequest) (*pb.LedRingProgressResponse, error) {
 	msg := &pb.UartMessage{
 		Type: pb.MessageType_LED_RING,

goTool/cmd_restart.go

@@ -0,0 +1,61 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+
+	"google.golang.org/protobuf/proto"
+	"powerpod/gotool/pb"
+)
+
+func runRestart(sp *serialPort, args []string) error {
+	fs := flag.NewFlagSet("restart", flag.ExitOnError)
+	clientID := fs.Uint("client", 0, "0=master, >0=ESP-NOW unicast to slave id")
+	if err := fs.Parse(args); err != nil {
+		return err
+	}
+	return runRestartClient(sp, uint32(*clientID))
+}
+
+func runRestartClient(sp *serialPort, clientID uint32) error {
+	resp, err := sp.restart(clientID)
+	if err != nil {
+		return err
+	}
+	if !resp.GetSuccess() {
+		return fmt.Errorf("restart rejected (client_id=%d)", resp.GetClientId())
+	}
+	if clientID == 0 {
+		fmt.Println("restart scheduled on master")
+	} else {
+		fmt.Printf("restart sent to slave %d\n", clientID)
+	}
+	return nil
+}
+
+func (s *serialPort) restart(clientID uint32) (*pb.RestartResponse, error) {
+	msg := &pb.UartMessage{
+		Type: pb.MessageType_RESTART,
+		Payload: &pb.UartMessage_RestartRequest{
+			RestartRequest: &pb.RestartRequest{ClientId: clientID},
+		},
+	}
+	body, err := proto.Marshal(msg)
+	if err != nil {
+		return nil, fmt.Errorf("encode: %w", err)
+	}
+	payload := append([]byte{byte(pb.MessageType_RESTART)}, body...)
+	respPayload, err := s.exchangePayload(payload, "RESTART")
+	if err != nil {
+		return nil, err
+	}
+	var respMsg pb.UartMessage
+	if err := proto.Unmarshal(respPayload[1:], &respMsg); err != nil {
+		return nil, fmt.Errorf("decode: %w", err)
+	}
+	r := respMsg.GetRestartResponse()
+	if r == nil {
+		return nil, fmt.Errorf("missing restart_response")
+	}
+	return r, nil
+}

goTool/main.go

@@ -22,7 +22,8 @@ func usage() {
 	fmt.Fprintf(os.Stderr, "  ota           UART OTA upload (A/B partitions)\n")
 	fmt.Fprintf(os.Stderr, "  ota-progress  query per-slave ESP-NOW OTA progress on master\n")
 	fmt.Fprintf(os.Stderr, "  led-ring      set LED ring progress bar (0–100%%, rgb, intensity)\n")
-	fmt.Fprintf(os.Stderr, "  find-me       blink LED ring red/green/blue (3× each, full brightness)\n\n")
+	fmt.Fprintf(os.Stderr, "  find-me       blink LED ring red/green/blue (3× each, full brightness)\n")
+	fmt.Fprintf(os.Stderr, "  restart       reboot master or slave (ESP-NOW)\n\n")
 	flag.PrintDefaults()
 }
 
@@ -49,7 +50,7 @@ func main() {
 			os.Exit(2)
 		}
 		runErr = runServe(*portName, *baud, flag.Args()[1:])
-	case "version", "clients", "client-info", "deadzone", "accel-deadzone", "unicast-test", "unicast_test", "led-ring", "led_ring", "find-me", "find_me", "ota", "ota-progress", "ota_progress":
+	case "version", "clients", "client-info", "deadzone", "accel-deadzone", "unicast-test", "unicast_test", "led-ring", "led_ring", "find-me", "find_me", "restart", "ota", "ota-progress", "ota_progress":
 		if *portName == "" {
 			fmt.Fprintf(os.Stderr, "command %q requires -port\n\n", cmd)
 			usage()
@@ -73,6 +74,8 @@ func main() {
 			runErr = runLedRing(sp, flag.Args()[1:])
 		case "find-me", "find_me":
 			runErr = runFindMe(sp, flag.Args()[1:])
+		case "restart":
+			runErr = runRestart(sp, flag.Args()[1:])
 		case "ota":
 			runErr = runOTA(sp, flag.Args()[1:])
 		case "ota-progress", "ota_progress":

goTool/pb/uart_messages.pb.go

@@ -40,6 +40,7 @@ const (
 	MessageType_OTA_START_ESPNOW    MessageType = 20
 	MessageType_OTA_SLAVE_PROGRESS  MessageType = 21
 	MessageType_FIND_ME             MessageType = 22
+	MessageType_RESTART             MessageType = 23
 )
 
 // Enum value maps for MessageType.
@@ -61,6 +62,7 @@ var (
 		20: "OTA_START_ESPNOW",
 		21: "OTA_SLAVE_PROGRESS",
 		22: "FIND_ME",
+		23: "RESTART",
 	}
 	MessageType_value = map[string]int32{
 		"UNKNOWN":             0,
@@ -79,6 +81,7 @@ var (
 		"OTA_START_ESPNOW":    20,
 		"OTA_SLAVE_PROGRESS":  21,
 		"FIND_ME":             22,
+		"RESTART":             23,
 	}
 )
 
@@ -133,6 +136,8 @@ type UartMessage struct {
 	//	*UartMessage_LedRingProgressResponse
 	//	*UartMessage_EspnowFindMeRequest
 	//	*UartMessage_EspnowFindMeResponse
+	//	*UartMessage_RestartRequest
+	//	*UartMessage_RestartResponse
 	Payload       isUartMessage_Payload `protobuf_oneof:"payload"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
@@ -353,6 +358,24 @@ func (x *UartMessage) GetEspnowFindMeResponse() *EspNowFindMeResponse {
 	return nil
 }
 
+func (x *UartMessage) GetRestartRequest() *RestartRequest {
+	if x != nil {
+		if x, ok := x.Payload.(*UartMessage_RestartRequest); ok {
+			return x.RestartRequest
+		}
+	}
+	return nil
+}
+
+func (x *UartMessage) GetRestartResponse() *RestartResponse {
+	if x != nil {
+		if x, ok := x.Payload.(*UartMessage_RestartResponse); ok {
+			return x.RestartResponse
+		}
+	}
+	return nil
+}
+
 type isUartMessage_Payload interface {
 	isUartMessage_Payload()
 }
@@ -433,6 +456,14 @@ type UartMessage_EspnowFindMeResponse struct {
 	EspnowFindMeResponse *EspNowFindMeResponse `protobuf:"bytes,20,opt,name=espnow_find_me_response,json=espnowFindMeResponse,proto3,oneof"`
 }
 
+type UartMessage_RestartRequest struct {
+	RestartRequest *RestartRequest `protobuf:"bytes,21,opt,name=restart_request,json=restartRequest,proto3,oneof"`
+}
+
+type UartMessage_RestartResponse struct {
+	RestartResponse *RestartResponse `protobuf:"bytes,22,opt,name=restart_response,json=restartResponse,proto3,oneof"`
+}
+
 func (*UartMessage_AckPayload) isUartMessage_Payload() {}
 
 func (*UartMessage_EchoPayload) isUartMessage_Payload() {}
@@ -471,6 +502,10 @@ func (*UartMessage_EspnowFindMeRequest) isUartMessage_Payload() {}
 
 func (*UartMessage_EspnowFindMeResponse) isUartMessage_Payload() {}
 
+func (*UartMessage_RestartRequest) isUartMessage_Payload() {}
+
+func (*UartMessage_RestartResponse) isUartMessage_Payload() {}
+
 type Ack struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	unknownFields protoimpl.UnknownFields
@@ -1383,6 +1418,103 @@ func (x *EspNowFindMeResponse) GetClientId() uint32 {
 	return 0
 }
 
+// * Host → master: restart local node (client_id=0) or ESP-NOW unicast to one slave.
+type RestartRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	ClientId      uint32                 `protobuf:"varint,1,opt,name=client_id,json=clientId,proto3" json:"client_id,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *RestartRequest) Reset() {
+	*x = RestartRequest{}
+	mi := &file_uart_messages_proto_msgTypes[16]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *RestartRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*RestartRequest) ProtoMessage() {}
+
+func (x *RestartRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_uart_messages_proto_msgTypes[16]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use RestartRequest.ProtoReflect.Descriptor instead.
+func (*RestartRequest) Descriptor() ([]byte, []int) {
+	return file_uart_messages_proto_rawDescGZIP(), []int{16}
+}
+
+func (x *RestartRequest) GetClientId() uint32 {
+	if x != nil {
+		return x.ClientId
+	}
+	return 0
+}
+
+type RestartResponse struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Success       bool                   `protobuf:"varint,1,opt,name=success,proto3" json:"success,omitempty"`
+	ClientId      uint32                 `protobuf:"varint,2,opt,name=client_id,json=clientId,proto3" json:"client_id,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *RestartResponse) Reset() {
+	*x = RestartResponse{}
+	mi := &file_uart_messages_proto_msgTypes[17]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *RestartResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*RestartResponse) ProtoMessage() {}
+
+func (x *RestartResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_uart_messages_proto_msgTypes[17]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use RestartResponse.ProtoReflect.Descriptor instead.
+func (*RestartResponse) Descriptor() ([]byte, []int) {
+	return file_uart_messages_proto_rawDescGZIP(), []int{17}
+}
+
+func (x *RestartResponse) GetSuccess() bool {
+	if x != nil {
+		return x.Success
+	}
+	return false
+}
+
+func (x *RestartResponse) GetClientId() uint32 {
+	if x != nil {
+		return x.ClientId
+	}
+	return 0
+}
+
 // Host → device: begin UART OTA (erase inactive OTA slot; device replies OTA_STATUS).
 type OtaStartPayload struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
@@ -1393,7 +1525,7 @@ type OtaStartPayload struct {
 
 func (x *OtaStartPayload) Reset() {
 	*x = OtaStartPayload{}
-	mi := &file_uart_messages_proto_msgTypes[16]
+	mi := &file_uart_messages_proto_msgTypes[18]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1405,7 +1537,7 @@ func (x *OtaStartPayload) String() string {
 func (*OtaStartPayload) ProtoMessage() {}
 
 func (x *OtaStartPayload) ProtoReflect() protoreflect.Message {
-	mi := &file_uart_messages_proto_msgTypes[16]
+	mi := &file_uart_messages_proto_msgTypes[18]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1418,7 +1550,7 @@ func (x *OtaStartPayload) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use OtaStartPayload.ProtoReflect.Descriptor instead.
 func (*OtaStartPayload) Descriptor() ([]byte, []int) {
-	return file_uart_messages_proto_rawDescGZIP(), []int{16}
+	return file_uart_messages_proto_rawDescGZIP(), []int{18}
 }
 
 func (x *OtaStartPayload) GetTotalSize() uint32 {
@@ -1439,7 +1571,7 @@ type OtaPayload struct {
 
 func (x *OtaPayload) Reset() {
 	*x = OtaPayload{}
-	mi := &file_uart_messages_proto_msgTypes[17]
+	mi := &file_uart_messages_proto_msgTypes[19]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1451,7 +1583,7 @@ func (x *OtaPayload) String() string {
 func (*OtaPayload) ProtoMessage() {}
 
 func (x *OtaPayload) ProtoReflect() protoreflect.Message {
-	mi := &file_uart_messages_proto_msgTypes[17]
+	mi := &file_uart_messages_proto_msgTypes[19]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1464,7 +1596,7 @@ func (x *OtaPayload) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use OtaPayload.ProtoReflect.Descriptor instead.
 func (*OtaPayload) Descriptor() ([]byte, []int) {
-	return file_uart_messages_proto_rawDescGZIP(), []int{17}
+	return file_uart_messages_proto_rawDescGZIP(), []int{19}
 }
 
 func (x *OtaPayload) GetSeq() uint32 {
@@ -1490,7 +1622,7 @@ type OtaEndPayload struct {
 
 func (x *OtaEndPayload) Reset() {
 	*x = OtaEndPayload{}
-	mi := &file_uart_messages_proto_msgTypes[18]
+	mi := &file_uart_messages_proto_msgTypes[20]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1502,7 +1634,7 @@ func (x *OtaEndPayload) String() string {
 func (*OtaEndPayload) ProtoMessage() {}
 
 func (x *OtaEndPayload) ProtoReflect() protoreflect.Message {
-	mi := &file_uart_messages_proto_msgTypes[18]
+	mi := &file_uart_messages_proto_msgTypes[20]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1515,7 +1647,7 @@ func (x *OtaEndPayload) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use OtaEndPayload.ProtoReflect.Descriptor instead.
 func (*OtaEndPayload) Descriptor() ([]byte, []int) {
-	return file_uart_messages_proto_rawDescGZIP(), []int{18}
+	return file_uart_messages_proto_rawDescGZIP(), []int{20}
 }
 
 // Device → host status (also used as ACK after each 4 KiB written).
@@ -1532,7 +1664,7 @@ type OtaStatusPayload struct {
 
 func (x *OtaStatusPayload) Reset() {
 	*x = OtaStatusPayload{}
-	mi := &file_uart_messages_proto_msgTypes[19]
+	mi := &file_uart_messages_proto_msgTypes[21]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1544,7 +1676,7 @@ func (x *OtaStatusPayload) String() string {
 func (*OtaStatusPayload) ProtoMessage() {}
 
 func (x *OtaStatusPayload) ProtoReflect() protoreflect.Message {
-	mi := &file_uart_messages_proto_msgTypes[19]
+	mi := &file_uart_messages_proto_msgTypes[21]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1557,7 +1689,7 @@ func (x *OtaStatusPayload) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use OtaStatusPayload.ProtoReflect.Descriptor instead.
 func (*OtaStatusPayload) Descriptor() ([]byte, []int) {
-	return file_uart_messages_proto_rawDescGZIP(), []int{19}
+	return file_uart_messages_proto_rawDescGZIP(), []int{21}
 }
 
 func (x *OtaStatusPayload) GetStatus() uint32 {
@@ -1598,7 +1730,7 @@ type OtaSlaveProgressRequest struct {
 
 func (x *OtaSlaveProgressRequest) Reset() {
 	*x = OtaSlaveProgressRequest{}
-	mi := &file_uart_messages_proto_msgTypes[20]
+	mi := &file_uart_messages_proto_msgTypes[22]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1610,7 +1742,7 @@ func (x *OtaSlaveProgressRequest) String() string {
 func (*OtaSlaveProgressRequest) ProtoMessage() {}
 
 func (x *OtaSlaveProgressRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_uart_messages_proto_msgTypes[20]
+	mi := &file_uart_messages_proto_msgTypes[22]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1623,7 +1755,7 @@ func (x *OtaSlaveProgressRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use OtaSlaveProgressRequest.ProtoReflect.Descriptor instead.
 func (*OtaSlaveProgressRequest) Descriptor() ([]byte, []int) {
-	return file_uart_messages_proto_rawDescGZIP(), []int{20}
+	return file_uart_messages_proto_rawDescGZIP(), []int{22}
 }
 
 func (x *OtaSlaveProgressRequest) GetClientId() uint32 {
@@ -1647,7 +1779,7 @@ type OtaSlaveProgressEntry struct {
 
 func (x *OtaSlaveProgressEntry) Reset() {
 	*x = OtaSlaveProgressEntry{}
-	mi := &file_uart_messages_proto_msgTypes[21]
+	mi := &file_uart_messages_proto_msgTypes[23]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1659,7 +1791,7 @@ func (x *OtaSlaveProgressEntry) String() string {
 func (*OtaSlaveProgressEntry) ProtoMessage() {}
 
 func (x *OtaSlaveProgressEntry) ProtoReflect() protoreflect.Message {
-	mi := &file_uart_messages_proto_msgTypes[21]
+	mi := &file_uart_messages_proto_msgTypes[23]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1672,7 +1804,7 @@ func (x *OtaSlaveProgressEntry) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use OtaSlaveProgressEntry.ProtoReflect.Descriptor instead.
 func (*OtaSlaveProgressEntry) Descriptor() ([]byte, []int) {
-	return file_uart_messages_proto_rawDescGZIP(), []int{21}
+	return file_uart_messages_proto_rawDescGZIP(), []int{23}
 }
 
 func (x *OtaSlaveProgressEntry) GetClientId() uint32 {
@@ -1723,7 +1855,7 @@ type OtaSlaveProgressResponse struct {
 
 func (x *OtaSlaveProgressResponse) Reset() {
 	*x = OtaSlaveProgressResponse{}
-	mi := &file_uart_messages_proto_msgTypes[22]
+	mi := &file_uart_messages_proto_msgTypes[24]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1735,7 +1867,7 @@ func (x *OtaSlaveProgressResponse) String() string {
 func (*OtaSlaveProgressResponse) ProtoMessage() {}
 
 func (x *OtaSlaveProgressResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_uart_messages_proto_msgTypes[22]
+	mi := &file_uart_messages_proto_msgTypes[24]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1748,7 +1880,7 @@ func (x *OtaSlaveProgressResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use OtaSlaveProgressResponse.ProtoReflect.Descriptor instead.
 func (*OtaSlaveProgressResponse) Descriptor() ([]byte, []int) {
-	return file_uart_messages_proto_rawDescGZIP(), []int{22}
+	return file_uart_messages_proto_rawDescGZIP(), []int{24}
 }
 
 func (x *OtaSlaveProgressResponse) GetActive() bool {
@@ -1790,7 +1922,7 @@ var File_uart_messages_proto protoreflect.FileDescriptor
 
 const file_uart_messages_proto_rawDesc = "" +
 	"\n" +
-	"\x13uart_messages.proto\x12\x04alox\x1a\fnanopb.proto\"\xeb\v\n" +
+	"\x13uart_messages.proto\x12\x04alox\x1a\fnanopb.proto\"\xf0\f\n" +
 	"\vUartMessage\x12%\n" +
 	"\x04type\x18\x01 \x01(\x0e2\x11.alox.MessageTypeR\x04type\x12,\n" +
 	"\vack_payload\x18\x02 \x01(\v2\t.alox.AckH\x00R\n" +
@@ -1815,7 +1947,9 @@ const file_uart_messages_proto_rawDesc = "" +
 	"\x19led_ring_progress_request\x18\x11 \x01(\v2\x1c.alox.LedRingProgressRequestH\x00R\x16ledRingProgressRequest\x12\\\n" +
 	"\x1aled_ring_progress_response\x18\x12 \x01(\v2\x1d.alox.LedRingProgressResponseH\x00R\x17ledRingProgressResponse\x12P\n" +
 	"\x16espnow_find_me_request\x18\x13 \x01(\v2\x19.alox.EspNowFindMeRequestH\x00R\x13espnowFindMeRequest\x12S\n" +
-	"\x17espnow_find_me_response\x18\x14 \x01(\v2\x1a.alox.EspNowFindMeResponseH\x00R\x14espnowFindMeResponseB\t\n" +
+	"\x17espnow_find_me_response\x18\x14 \x01(\v2\x1a.alox.EspNowFindMeResponseH\x00R\x14espnowFindMeResponse\x12?\n" +
+	"\x0frestart_request\x18\x15 \x01(\v2\x14.alox.RestartRequestH\x00R\x0erestartRequest\x12B\n" +
+	"\x10restart_response\x18\x16 \x01(\v2\x15.alox.RestartResponseH\x00R\x0frestartResponseB\t\n" +
 	"\apayload\"\x05\n" +
 	"\x03Ack\"!\n" +
 	"\vEchoPayload\x12\x12\n" +
@@ -1879,6 +2013,11 @@ const file_uart_messages_proto_rawDesc = "" +
 	"\tclient_id\x18\x01 \x01(\rR\bclientId\"M\n" +
 	"\x14EspNowFindMeResponse\x12\x18\n" +
 	"\asuccess\x18\x01 \x01(\bR\asuccess\x12\x1b\n" +
+	"\tclient_id\x18\x02 \x01(\rR\bclientId\"-\n" +
+	"\x0eRestartRequest\x12\x1b\n" +
+	"\tclient_id\x18\x01 \x01(\rR\bclientId\"H\n" +
+	"\x0fRestartResponse\x12\x18\n" +
+	"\asuccess\x18\x01 \x01(\bR\asuccess\x12\x1b\n" +
 	"\tclient_id\x18\x02 \x01(\rR\bclientId\"0\n" +
 	"\x0fOtaStartPayload\x12\x1d\n" +
 	"\n" +
@@ -1910,7 +2049,7 @@ const file_uart_messages_proto_rawDesc = "" +
 	"\x0faggregate_bytes\x18\x03 \x01(\rR\x0eaggregateBytes\x12\x1f\n" +
 	"\vslave_count\x18\x04 \x01(\rR\n" +
 	"slaveCount\x12:\n" +
-	"\x06slaves\x18\x05 \x03(\v2\x1b.alox.OtaSlaveProgressEntryB\x05\x92?\x02\x10\x10R\x06slaves*\x90\x02\n" +
+	"\x06slaves\x18\x05 \x03(\v2\x1b.alox.OtaSlaveProgressEntryB\x05\x92?\x02\x10\x10R\x06slaves*\x9d\x02\n" +
 	"\vMessageType\x12\v\n" +
 	"\aUNKNOWN\x10\x00\x12\a\n" +
 	"\x03ACK\x10\x01\x12\b\n" +
@@ -1928,7 +2067,8 @@ const file_uart_messages_proto_rawDesc = "" +
 	"OTA_STATUS\x10\x13\x12\x14\n" +
 	"\x10OTA_START_ESPNOW\x10\x14\x12\x16\n" +
 	"\x12OTA_SLAVE_PROGRESS\x10\x15\x12\v\n" +
-	"\aFIND_ME\x10\x16b\x06proto3"
+	"\aFIND_ME\x10\x16\x12\v\n" +
+	"\aRESTART\x10\x17b\x06proto3"
 
 var (
 	file_uart_messages_proto_rawDescOnce sync.Once
@@ -1943,7 +2083,7 @@ func file_uart_messages_proto_rawDescGZIP() []byte {
 }
 
 var file_uart_messages_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
-var file_uart_messages_proto_msgTypes = make([]protoimpl.MessageInfo, 23)
+var file_uart_messages_proto_msgTypes = make([]protoimpl.MessageInfo, 25)
 var file_uart_messages_proto_goTypes = []any{
 	(MessageType)(0),                  // 0: alox.MessageType
 	(*UartMessage)(nil),               // 1: alox.UartMessage
@@ -1962,13 +2102,15 @@ var file_uart_messages_proto_goTypes = []any{
 	(*LedRingProgressResponse)(nil),   // 14: alox.LedRingProgressResponse
 	(*EspNowFindMeRequest)(nil),       // 15: alox.EspNowFindMeRequest
 	(*EspNowFindMeResponse)(nil),      // 16: alox.EspNowFindMeResponse
-	(*OtaStartPayload)(nil),           // 17: alox.OtaStartPayload
+	(*RestartRequest)(nil),            // 17: alox.RestartRequest
-	(*OtaPayload)(nil),                // 18: alox.OtaPayload
+	(*RestartResponse)(nil),           // 18: alox.RestartResponse
-	(*OtaEndPayload)(nil),             // 19: alox.OtaEndPayload
+	(*OtaStartPayload)(nil),           // 19: alox.OtaStartPayload
-	(*OtaStatusPayload)(nil),          // 20: alox.OtaStatusPayload
+	(*OtaPayload)(nil),                // 20: alox.OtaPayload
-	(*OtaSlaveProgressRequest)(nil),   // 21: alox.OtaSlaveProgressRequest
+	(*OtaEndPayload)(nil),             // 21: alox.OtaEndPayload
-	(*OtaSlaveProgressEntry)(nil),     // 22: alox.OtaSlaveProgressEntry
+	(*OtaStatusPayload)(nil),          // 22: alox.OtaStatusPayload
-	(*OtaSlaveProgressResponse)(nil),  // 23: alox.OtaSlaveProgressResponse
+	(*OtaSlaveProgressRequest)(nil),   // 23: alox.OtaSlaveProgressRequest
+	(*OtaSlaveProgressEntry)(nil),     // 24: alox.OtaSlaveProgressEntry
+	(*OtaSlaveProgressResponse)(nil),  // 25: alox.OtaSlaveProgressResponse
 }
 var file_uart_messages_proto_depIdxs = []int32{
 	0,  // 0: alox.UartMessage.type:type_name -> alox.MessageType
@@ -1977,28 +2119,30 @@ var file_uart_messages_proto_depIdxs = []int32{
 	4,  // 3: alox.UartMessage.version_response:type_name -> alox.VersionResponse
 	6,  // 4: alox.UartMessage.client_info_response:type_name -> alox.ClientInfoResponse
 	8,  // 5: alox.UartMessage.client_input_response:type_name -> alox.ClientInputResponse
-	17, // 6: alox.UartMessage.ota_start:type_name -> alox.OtaStartPayload
+	19, // 6: alox.UartMessage.ota_start:type_name -> alox.OtaStartPayload
-	18, // 7: alox.UartMessage.ota_payload:type_name -> alox.OtaPayload
+	20, // 7: alox.UartMessage.ota_payload:type_name -> alox.OtaPayload
-	19, // 8: alox.UartMessage.ota_end:type_name -> alox.OtaEndPayload
+	21, // 8: alox.UartMessage.ota_end:type_name -> alox.OtaEndPayload
-	20, // 9: alox.UartMessage.ota_status:type_name -> alox.OtaStatusPayload
+	22, // 9: alox.UartMessage.ota_status:type_name -> alox.OtaStatusPayload
 	9,  // 10: alox.UartMessage.accel_deadzone_request:type_name -> alox.AccelDeadzoneRequest
 	10, // 11: alox.UartMessage.accel_deadzone_response:type_name -> alox.AccelDeadzoneResponse
 	11, // 12: alox.UartMessage.espnow_unicast_test_request:type_name -> alox.EspNowUnicastTestRequest
 	12, // 13: alox.UartMessage.espnow_unicast_test_response:type_name -> alox.EspNowUnicastTestResponse
-	21, // 14: alox.UartMessage.ota_slave_progress_request:type_name -> alox.OtaSlaveProgressRequest
+	23, // 14: alox.UartMessage.ota_slave_progress_request:type_name -> alox.OtaSlaveProgressRequest
-	23, // 15: alox.UartMessage.ota_slave_progress_response:type_name -> alox.OtaSlaveProgressResponse
+	25, // 15: alox.UartMessage.ota_slave_progress_response:type_name -> alox.OtaSlaveProgressResponse
 	13, // 16: alox.UartMessage.led_ring_progress_request:type_name -> alox.LedRingProgressRequest
 	14, // 17: alox.UartMessage.led_ring_progress_response:type_name -> alox.LedRingProgressResponse
 	15, // 18: alox.UartMessage.espnow_find_me_request:type_name -> alox.EspNowFindMeRequest
 	16, // 19: alox.UartMessage.espnow_find_me_response:type_name -> alox.EspNowFindMeResponse
-	5,  // 20: alox.ClientInfoResponse.clients:type_name -> alox.ClientInfo
+	17, // 20: alox.UartMessage.restart_request:type_name -> alox.RestartRequest
-	7,  // 21: alox.ClientInputResponse.clients:type_name -> alox.ClientInput
+	18, // 21: alox.UartMessage.restart_response:type_name -> alox.RestartResponse
-	22, // 22: alox.OtaSlaveProgressResponse.slaves:type_name -> alox.OtaSlaveProgressEntry
+	5,  // 22: alox.ClientInfoResponse.clients:type_name -> alox.ClientInfo
-	23, // [23:23] is the sub-list for method output_type
+	7,  // 23: alox.ClientInputResponse.clients:type_name -> alox.ClientInput
-	23, // [23:23] is the sub-list for method input_type
+	24, // 24: alox.OtaSlaveProgressResponse.slaves:type_name -> alox.OtaSlaveProgressEntry
-	23, // [23:23] is the sub-list for extension type_name
+	25, // [25:25] is the sub-list for method output_type
-	23, // [23:23] is the sub-list for extension extendee
+	25, // [25:25] is the sub-list for method input_type
-	0,  // [0:23] is the sub-list for field type_name
+	25, // [25:25] is the sub-list for extension type_name
+	25, // [25:25] is the sub-list for extension extendee
+	0,  // [0:25] is the sub-list for field type_name
 }
 
 func init() { file_uart_messages_proto_init() }
@@ -2026,6 +2170,8 @@ func file_uart_messages_proto_init() {
 		(*UartMessage_LedRingProgressResponse)(nil),
 		(*UartMessage_EspnowFindMeRequest)(nil),
 		(*UartMessage_EspnowFindMeResponse)(nil),
+		(*UartMessage_RestartRequest)(nil),
+		(*UartMessage_RestartResponse)(nil),
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
@@ -2033,7 +2179,7 @@ func file_uart_messages_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: unsafe.Slice(unsafe.StringData(file_uart_messages_proto_rawDesc), len(file_uart_messages_proto_rawDesc)),
 			NumEnums:      1,
-			NumMessages:   23,
+			NumMessages:   25,
 			NumExtensions: 0,
 			NumServices:   0,
 		},

goTool/webui/index.html

@@ -233,6 +233,12 @@
                         title="LED-Ring: Rot/Grün/Blau je 3×">
                   Find me
                 </button>
+                <button type="button" class="btn btn-outline-secondary btn-sm"
+                        @click="restart(0)"
+                        :disabled="busy || !state.uart_connected"
+                        title="Master neu starten">
+                  Restart
+                </button>
               </div>
               <p class="text-muted small mt-2 mb-0" x-show="!state.uart_connected">
                 UART nicht verbunden — Eingabe gesperrt.
@@ -312,6 +318,12 @@
                                   title="LED-Ring Find me (ESP-NOW)">
                             Find me
                           </button>
+                          <button type="button" class="btn btn-outline-secondary btn-sm"
+                                  @click="restart(c.id)"
+                                  :disabled="busy || !state.uart_connected || !c.available"
+                                  title="Neustart per ESP-NOW">
+                            Restart
+                          </button>
                         </div>
                       </td>
                     </tr>
@@ -366,7 +378,11 @@
                          x-text="ota.masterMessage || (ota.step === 'master' ? ota.message : '')"></p>
                     </td>
                     <td class="ota-restart-col text-end">
-                      <button type="button" class="btn btn-outline-secondary btn-sm">Restart</button>
+                      <button type="button" class="btn btn-outline-secondary btn-sm"
+                              @click="restart(0)"
+                              :disabled="busy || !state.uart_connected">
+                        Restart
+                      </button>
                     </td>
                   </tr>
                 </tbody>
@@ -399,7 +415,11 @@
                         <p class="small text-muted mb-0" x-text="row.bytesLabel"></p>
                       </td>
                       <td class="ota-restart-col text-end">
-                        <button type="button" class="btn btn-outline-secondary btn-sm">Restart</button>
+                        <button type="button" class="btn btn-outline-secondary btn-sm"
+                                @click="restart(row.id)"
+                                :disabled="busy || !state.uart_connected">
+                          Restart
+                        </button>
                       </td>
                     </tr>
                   </template>
@@ -739,6 +759,27 @@
             this.busy = false;
           }
         },
+        async restart(clientId = 0) {
+          this.busy = true;
+          try {
+            const r = await fetch('/api/restart', {
+              method: 'POST',
+              headers: { 'Content-Type': 'application/json' },
+              body: JSON.stringify({ client_id: clientId })
+            });
+            const data = await r.json();
+            if (!r.ok || !data.success) {
+              this.flash(data.error || 'Restart fehlgeschlagen', false);
+              return;
+            }
+            const label = clientId === 0 ? 'Master' : `Slave ${clientId}`;
+            this.flash(`Restart ausgelöst (${label})`, true);
+          } catch (e) {
+            this.flash(String(e), false);
+          } finally {
+            this.busy = false;
+          }
+        },
         async findMe(clientId = 0) {
           this.busy = true;
           try {

main/CMakeLists.txt

@@ -20,6 +20,8 @@ idf_component_register(
   "cmd_accel_deadzone.c"
   "cmd_espnow_unicast_test.c"
   "cmd_espnow_find_me.c"
+  "cmd_restart.c"
+  "pod_reboot.c"
   "cmd_led_ring.c"
   "cmd_ota.c"
   "cmd_ota_slave_progress.c"

main/README.md

@@ -114,6 +114,7 @@ Schema: `proto/esp_now_messages.proto`. Encode/decode: `esp_now_proto.c`. The ES
 | `ESPNOW_SET_ACCEL_DEADZONE` | Master → slave | `EspNowAccelDeadzone` (`deadzone` LSB) |
 | `ESPNOW_UNICAST_TEST` | Master → slave | `EspNowUnicastTest` (`seq`) |
 | `ESPNOW_FIND_ME` | Master → slave | `EspNowFindMe` (`client_id` filter) — LED locate sequence |
+| `ESPNOW_RESTART` | Master → slave | `EspNowRestart` (`client_id` filter) — reboot slave |
 | `ESPNOW_OTA_START` | Master → slave (unicast) | `EspNowOtaStart` (`total_size`) |
 | `ESPNOW_OTA_PAYLOAD` | Master → slave | `EspNowOtaPayload` (`seq`, up to 200 B `data`) |
 | `ESPNOW_OTA_END` | Master → slave | `EspNowOtaEnd` |
@@ -215,6 +216,7 @@ Host and master speak nanopb-encoded `UartMessage` inside UART frames (byte 0 =
 | 20 | `OTA_START_ESPNOW` | Implemented — re-distribute staged image to slaves only |
 | 21 | `OTA_SLAVE_PROGRESS` | Implemented (`cmd_ota_slave_progress.c`) — query per-slave ESP-NOW OTA progress |
 | 22 | `FIND_ME` | Implemented (`cmd_espnow_find_me.c`) — `client_id=0` local ring, `>0` ESP-NOW to slave |
+| 23 | `RESTART` | Implemented (`cmd_restart.c`) — `client_id=0` reboot master, `>0` ESP-NOW reboot slave |
 
 Regenerate C code:
 
@@ -331,6 +333,18 @@ go run . -port /dev/ttyUSB0 find-me
 go run . -port /dev/ttyUSB0 find-me -client 16
 ```
 
+### RESTART command
+
+Reboot the master (`client_id=0`) or one slave via ESP-NOW (`client_id` = registry id). The device sends the UART response, then restarts after ~150 ms.
+
+**Request:** framed `23` + `restart_request`  
+**Response:** `restart_response` (`success`, `client_id`)
+
+```bash
+go run . -port /dev/ttyUSB0 restart
+go run . -port /dev/ttyUSB0 restart -client 16
+```
+
 ### LED_RING command
 
 Control the 95-LED ring from the host. The firmware **does not** animate digits locally; only UART updates the display.

main/cmd_handler.c

@@ -46,6 +46,8 @@ static const char *message_type_name(uint16_t id) {
     return "OTA_SLAVE_PROGRESS";
   case alox_MessageType_FIND_ME:
     return "FIND_ME";
+  case alox_MessageType_RESTART:
+    return "RESTART";
   default:
     return "UNKNOWN";
   }

main/cmd_restart.c

@@ -0,0 +1,63 @@
+#include "client_registry.h"
+#include "cmd_restart.h"
+#include "esp_log.h"
+#include "esp_now_comm.h"
+#include "pod_reboot.h"
+#include "uart_cmd.h"
+
+static const char *TAG = "[RESTART_CMD]";
+
+static void reply(bool success, uint32_t client_id) {
+  alox_UartMessage response;
+  uart_cmd_init_response(&response, alox_MessageType_RESTART,
+                         alox_UartMessage_restart_response_tag);
+  response.payload.restart_response.success = success;
+  response.payload.restart_response.client_id = client_id;
+  uart_cmd_send(&response, TAG);
+}
+
+static void handle_restart(const uint8_t *data, size_t len) {
+  alox_UartMessage uart_msg;
+
+  if (uart_cmd_decode(data, len, &uart_msg) != ESP_OK) {
+    ESP_LOGW(TAG, "decode failed");
+    reply(false, 0);
+    return;
+  }
+
+  const alox_RestartRequest *req = UART_CMD_REQ(
+      &uart_msg, alox_UartMessage_restart_request_tag, restart_request);
+  if (req == NULL) {
+    ESP_LOGW(TAG, "missing restart request");
+    reply(false, 0);
+    return;
+  }
+
+  if (req->client_id == 0) {
+    ESP_LOGI(TAG, "restart master");
+    reply(true, 0);
+    pod_schedule_restart();
+    return;
+  }
+
+  const client_info_t *client = client_registry_find_by_id(req->client_id);
+  if (client == NULL) {
+    ESP_LOGW(TAG, "client id %lu not in registry",
+             (unsigned long)req->client_id);
+    reply(false, req->client_id);
+    return;
+  }
+
+  esp_err_t err = esp_now_comm_send_restart(client->mac, req->client_id);
+  if (err == ESP_OK) {
+    ESP_LOGI(TAG, "restart sent to slave %lu", (unsigned long)req->client_id);
+  } else {
+    ESP_LOGW(TAG, "restart to slave %lu failed: %s",
+             (unsigned long)req->client_id, esp_err_to_name(err));
+  }
+  reply(err == ESP_OK, req->client_id);
+}
+
+void cmd_restart_register(void) {
+  uart_cmd_register(alox_MessageType_RESTART, handle_restart);
+}

main/cmd_restart.h

@@ -0,0 +1,6 @@
+#ifndef CMD_RESTART_H
+#define CMD_RESTART_H
+
+void cmd_restart_register(void);
+
+#endif

main/esp_now_comm.c

@@ -3,6 +3,7 @@
 #include "esp_now_comm.h"
 #include "led_ring.h"
 #include "ota_espnow.h"
+#include "pod_reboot.h"
 #include "pod_settings.h"
 #include "esp_now_proto.h"
 #include "esp_err.h"
@@ -182,6 +183,16 @@ static esp_err_t send_find_me(const uint8_t *dest_mac, uint32_t client_id) {
   return send_message(dest_mac, &msg);
 }
 
+static esp_err_t send_restart(const uint8_t *dest_mac, uint32_t client_id) {
+  alox_EspNowMessage msg = alox_EspNowMessage_init_zero;
+
+  msg.type = alox_EspNowMessageType_ESPNOW_RESTART;
+  msg.which_payload = alox_EspNowMessage_restart_tag;
+  msg.payload.restart.client_id = client_id;
+
+  return send_message(dest_mac, &msg);
+}
+
 static esp_err_t send_ota_start(const uint8_t *dest_mac, uint32_t total_size) {
   alox_EspNowMessage msg = alox_EspNowMessage_init_zero;
 
@@ -272,6 +283,25 @@ bool esp_now_comm_get_master_mac(uint8_t mac_out[CLIENT_MAC_LEN]) {
   return true;
 }
 
+esp_err_t esp_now_comm_send_restart(const uint8_t mac[CLIENT_MAC_LEN],
+                                    uint32_t client_id) {
+  if (mac == NULL || !s_config.master) {
+    return ESP_ERR_INVALID_STATE;
+  }
+
+  char mac_str[18];
+  mac_to_str(mac, mac_str, sizeof(mac_str));
+  esp_err_t err = send_restart(mac, client_id);
+  if (err == ESP_OK) {
+    ESP_LOGI(TAG, "unicast RESTART to %s client_id=%lu", mac_str,
+             (unsigned long)client_id);
+  } else {
+    ESP_LOGW(TAG, "unicast RESTART to %s failed: %s", mac_str,
+             esp_err_to_name(err));
+  }
+  return err;
+}
+
 esp_err_t esp_now_comm_send_find_me(const uint8_t mac[CLIENT_MAC_LEN],
                                     uint32_t client_id) {
   if (mac == NULL || !s_config.master) {
@@ -360,6 +390,24 @@ static void handle_slave_unicast_test(const uint8_t *master_mac,
            mac_str, (unsigned long)test->seq, (int)s_slave_joined);
 }
 
+static void handle_slave_restart(const uint8_t *master_mac,
+                                 const alox_EspNowRestart *req) {
+  uint32_t my_id = s_own_mac[5];
+
+  if (req->client_id != 0 && req->client_id != my_id) {
+    return;
+  }
+
+  if (s_slave_joined && !mac_equal(master_mac, s_master_mac)) {
+    return;
+  }
+
+  char mac_str[18];
+  mac_to_str(master_mac, mac_str, sizeof(mac_str));
+  ESP_LOGI(TAG, "RESTART from master %s (id=%lu)", mac_str, (unsigned long)my_id);
+  pod_schedule_restart();
+}
+
 static void handle_slave_find_me(const uint8_t *master_mac,
                                  const alox_EspNowFindMe *req) {
   uint32_t my_id = s_own_mac[5];
@@ -550,6 +598,12 @@ static void espnow_recv_cb(const esp_now_recv_info_t *info, const uint8_t *data,
       }
       handle_slave_find_me(info->src_addr, &msg.payload.find_me);
       break;
+    case alox_EspNowMessage_restart_tag:
+      if (!s_slave_joined || !mac_equal(info->src_addr, s_master_mac)) {
+        break;
+      }
+      handle_slave_restart(info->src_addr, &msg.payload.restart);
+      break;
     case alox_EspNowMessage_ota_start_tag:
     case alox_EspNowMessage_ota_payload_tag:
     case alox_EspNowMessage_ota_end_tag:

main/esp_now_comm.h

@@ -19,6 +19,10 @@ esp_err_t esp_now_comm_send_unicast_test(const uint8_t mac[CLIENT_MAC_LEN],
 esp_err_t esp_now_comm_send_find_me(const uint8_t mac[CLIENT_MAC_LEN],
                                     uint32_t client_id);
 
+/** Master: request reboot on one slave. */
+esp_err_t esp_now_comm_send_restart(const uint8_t mac[CLIENT_MAC_LEN],
+                                    uint32_t client_id);
+
 /** Master → slave OTA (unicast). */
 esp_err_t esp_now_comm_send_ota_start(const uint8_t mac[CLIENT_MAC_LEN],
                                       uint32_t total_size);

main/pod_reboot.c

@@ -0,0 +1,23 @@
+#include "pod_reboot.h"
+#include "esp_log.h"
+#include "esp_system.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+static const char *TAG = "[REBOOT]";
+
+#define POD_RESTART_DELAY_MS 150
+
+static void restart_task(void *param) {
+  (void)param;
+  vTaskDelay(pdMS_TO_TICKS(POD_RESTART_DELAY_MS));
+  ESP_LOGI(TAG, "restarting");
+  esp_restart();
+}
+
+void pod_schedule_restart(void) {
+  if (xTaskCreate(restart_task, "pod_restart", 2048, NULL, 5, NULL) != pdPASS) {
+    ESP_LOGE(TAG, "failed to create restart task");
+    esp_restart();
+  }
+}

main/pod_reboot.h

@@ -0,0 +1,7 @@
+#ifndef POD_REBOOT_H
+#define POD_REBOOT_H
+
+/** Reboot after a short delay (lets UART / ESP-NOW handlers finish). */
+void pod_schedule_restart(void);
+
+#endif

main/powerpod.c

@@ -3,6 +3,7 @@
 #include "cmd_accel_deadzone.h"
 #include "cmd_espnow_unicast_test.h"
 #include "cmd_espnow_find_me.h"
+#include "cmd_restart.h"
 #include "cmd_client_info.h"
 #include "cmd_version.h"
 #include "cmd_ota.h"
@@ -178,6 +179,7 @@ void app_main(void) {
     cmd_accel_deadzone_register();
     cmd_espnow_unicast_test_register();
     cmd_espnow_find_me_register();
+    cmd_restart_register();
     cmd_led_ring_register();
     cmd_ota_register();
     cmd_ota_slave_progress_register();

main/proto/esp_now_messages.pb.c

@@ -12,6 +12,9 @@ PB_BIND(alox_EspNowUnicastTest, alox_EspNowUnicastTest, AUTO)
 PB_BIND(alox_EspNowFindMe, alox_EspNowFindMe, AUTO)
 
 
+PB_BIND(alox_EspNowRestart, alox_EspNowRestart, AUTO)
+
+
 PB_BIND(alox_EspNowDiscover, alox_EspNowDiscover, AUTO)
 
 

main/proto/esp_now_messages.pb.h

@@ -21,7 +21,8 @@ typedef enum _alox_EspNowMessageType {
     alox_EspNowMessageType_ESPNOW_OTA_PAYLOAD = 7,
     alox_EspNowMessageType_ESPNOW_OTA_END = 8,
     alox_EspNowMessageType_ESPNOW_OTA_STATUS = 9,
-    alox_EspNowMessageType_ESPNOW_FIND_ME = 10
+    alox_EspNowMessageType_ESPNOW_FIND_ME = 10,
+    alox_EspNowMessageType_ESPNOW_RESTART = 11
 } alox_EspNowMessageType;
 
 /* Struct definitions */
@@ -35,6 +36,11 @@ typedef struct _alox_EspNowFindMe {
     uint32_t client_id;
 } alox_EspNowFindMe;
 
+/* * Master → slave: reboot after short delay. */
+typedef struct _alox_EspNowRestart {
+    uint32_t client_id;
+} alox_EspNowRestart;
+
 typedef struct _alox_EspNowDiscover {
     uint32_t network;
 } alox_EspNowDiscover;
@@ -91,6 +97,7 @@ typedef struct _alox_EspNowMessage {
         alox_EspNowOtaEnd ota_end;
         alox_EspNowOtaStatus ota_status;
         alox_EspNowFindMe find_me;
+        alox_EspNowRestart restart;
     } payload;
 } alox_EspNowMessage;
 
@@ -101,8 +108,9 @@ extern "C" {
 
 /* Helper constants for enums */
 #define _alox_EspNowMessageType_MIN alox_EspNowMessageType_ESPNOW_UNKNOWN
-#define _alox_EspNowMessageType_MAX alox_EspNowMessageType_ESPNOW_FIND_ME
+#define _alox_EspNowMessageType_MAX alox_EspNowMessageType_ESPNOW_RESTART
-#define _alox_EspNowMessageType_ARRAYSIZE ((alox_EspNowMessageType)(alox_EspNowMessageType_ESPNOW_FIND_ME+1))
+#define _alox_EspNowMessageType_ARRAYSIZE ((alox_EspNowMessageType)(alox_EspNowMessageType_ESPNOW_RESTART+1))
+
 
 
 
@@ -119,6 +127,7 @@ extern "C" {
 /* Initializer values for message structs */
 #define alox_EspNowUnicastTest_init_default      {0}
 #define alox_EspNowFindMe_init_default           {0}
+#define alox_EspNowRestart_init_default          {0}
 #define alox_EspNowDiscover_init_default         {0}
 #define alox_EspNowSlavePresence_init_default    {0, {{NULL}, NULL}, 0, 0, 0, 0}
 #define alox_EspNowAccelDeadzone_init_default    {0, 0}
@@ -129,6 +138,7 @@ extern "C" {
 #define alox_EspNowMessage_init_default          {_alox_EspNowMessageType_MIN, 0, {alox_EspNowDiscover_init_default}}
 #define alox_EspNowUnicastTest_init_zero         {0}
 #define alox_EspNowFindMe_init_zero              {0}
+#define alox_EspNowRestart_init_zero             {0}
 #define alox_EspNowDiscover_init_zero            {0}
 #define alox_EspNowSlavePresence_init_zero       {0, {{NULL}, NULL}, 0, 0, 0, 0}
 #define alox_EspNowAccelDeadzone_init_zero       {0, 0}
@@ -141,6 +151,7 @@ extern "C" {
 /* Field tags (for use in manual encoding/decoding) */
 #define alox_EspNowUnicastTest_seq_tag           1
 #define alox_EspNowFindMe_client_id_tag          1
+#define alox_EspNowRestart_client_id_tag         1
 #define alox_EspNowDiscover_network_tag          1
 #define alox_EspNowSlavePresence_network_tag     1
 #define alox_EspNowSlavePresence_mac_tag         2
@@ -167,6 +178,7 @@ extern "C" {
 #define alox_EspNowMessage_ota_end_tag           9
 #define alox_EspNowMessage_ota_status_tag        10
 #define alox_EspNowMessage_find_me_tag           11
+#define alox_EspNowMessage_restart_tag           12
 
 /* Struct field encoding specification for nanopb */
 #define alox_EspNowUnicastTest_FIELDLIST(X, a) \
@@ -179,6 +191,11 @@ X(a, STATIC,   SINGULAR, UINT32,   client_id,         1)
 #define alox_EspNowFindMe_CALLBACK NULL
 #define alox_EspNowFindMe_DEFAULT NULL
 
+#define alox_EspNowRestart_FIELDLIST(X, a) \
+X(a, STATIC,   SINGULAR, UINT32,   client_id,         1)
+#define alox_EspNowRestart_CALLBACK NULL
+#define alox_EspNowRestart_DEFAULT NULL
+
 #define alox_EspNowDiscover_FIELDLIST(X, a) \
 X(a, STATIC,   SINGULAR, UINT32,   network,           1)
 #define alox_EspNowDiscover_CALLBACK NULL
@@ -234,7 +251,8 @@ X(a, STATIC,   ONEOF,    MESSAGE,  (payload,ota_start,payload.ota_start),   7) \
 X(a, STATIC,   ONEOF,    MESSAGE,  (payload,ota_payload,payload.ota_payload),   8) \
 X(a, STATIC,   ONEOF,    MESSAGE,  (payload,ota_end,payload.ota_end),   9) \
 X(a, STATIC,   ONEOF,    MESSAGE,  (payload,ota_status,payload.ota_status),  10) \
-X(a, STATIC,   ONEOF,    MESSAGE,  (payload,find_me,payload.find_me),  11)
+X(a, STATIC,   ONEOF,    MESSAGE,  (payload,find_me,payload.find_me),  11) \
+X(a, STATIC,   ONEOF,    MESSAGE,  (payload,restart,payload.restart),  12)
 #define alox_EspNowMessage_CALLBACK NULL
 #define alox_EspNowMessage_DEFAULT NULL
 #define alox_EspNowMessage_payload_discover_MSGTYPE alox_EspNowDiscover
@@ -247,9 +265,11 @@ X(a, STATIC,   ONEOF,    MESSAGE,  (payload,find_me,payload.find_me),  11)
 #define alox_EspNowMessage_payload_ota_end_MSGTYPE alox_EspNowOtaEnd
 #define alox_EspNowMessage_payload_ota_status_MSGTYPE alox_EspNowOtaStatus
 #define alox_EspNowMessage_payload_find_me_MSGTYPE alox_EspNowFindMe
+#define alox_EspNowMessage_payload_restart_MSGTYPE alox_EspNowRestart
 
 extern const pb_msgdesc_t alox_EspNowUnicastTest_msg;
 extern const pb_msgdesc_t alox_EspNowFindMe_msg;
+extern const pb_msgdesc_t alox_EspNowRestart_msg;
 extern const pb_msgdesc_t alox_EspNowDiscover_msg;
 extern const pb_msgdesc_t alox_EspNowSlavePresence_msg;
 extern const pb_msgdesc_t alox_EspNowAccelDeadzone_msg;
@@ -262,6 +282,7 @@ extern const pb_msgdesc_t alox_EspNowMessage_msg;
 /* Defines for backwards compatibility with code written before nanopb-0.4.0 */
 #define alox_EspNowUnicastTest_fields &alox_EspNowUnicastTest_msg
 #define alox_EspNowFindMe_fields &alox_EspNowFindMe_msg
+#define alox_EspNowRestart_fields &alox_EspNowRestart_msg
 #define alox_EspNowDiscover_fields &alox_EspNowDiscover_msg
 #define alox_EspNowSlavePresence_fields &alox_EspNowSlavePresence_msg
 #define alox_EspNowAccelDeadzone_fields &alox_EspNowAccelDeadzone_msg
@@ -282,6 +303,7 @@ extern const pb_msgdesc_t alox_EspNowMessage_msg;
 #define alox_EspNowOtaPayload_size               209
 #define alox_EspNowOtaStart_size                 6
 #define alox_EspNowOtaStatus_size                18
+#define alox_EspNowRestart_size                  6
 #define alox_EspNowUnicastTest_size              6
 
 #ifdef __cplusplus

main/proto/esp_now_messages.proto

@@ -16,6 +16,7 @@ enum EspNowMessageType {
   ESPNOW_OTA_END = 8;
   ESPNOW_OTA_STATUS = 9;
   ESPNOW_FIND_ME = 10;
+  ESPNOW_RESTART = 11;
 }
 
 message EspNowUnicastTest {
@@ -28,6 +29,11 @@ message EspNowFindMe {
   uint32 client_id = 1;
 }
 
+/** Master → slave: reboot after short delay. */
+message EspNowRestart {
+  uint32 client_id = 1;
+}
+
 message EspNowDiscover {
   uint32 network = 1;
 }
@@ -80,5 +86,6 @@ message EspNowMessage {
     EspNowOtaEnd ota_end = 9;
     EspNowOtaStatus ota_status = 10;
     EspNowFindMe find_me = 11;
+    EspNowRestart restart = 12;
   }
 }

main/proto/uart_messages.pb.c

@@ -54,6 +54,12 @@ PB_BIND(alox_EspNowFindMeRequest, alox_EspNowFindMeRequest, AUTO)
 PB_BIND(alox_EspNowFindMeResponse, alox_EspNowFindMeResponse, AUTO)
 
 
+PB_BIND(alox_RestartRequest, alox_RestartRequest, AUTO)
+
+
+PB_BIND(alox_RestartResponse, alox_RestartResponse, AUTO)
+
+
 PB_BIND(alox_OtaStartPayload, alox_OtaStartPayload, AUTO)
 
 

main/proto/uart_messages.pb.h

@@ -26,7 +26,8 @@ typedef enum _alox_MessageType {
     alox_MessageType_OTA_STATUS = 19,
     alox_MessageType_OTA_START_ESPNOW = 20,
     alox_MessageType_OTA_SLAVE_PROGRESS = 21,
-    alox_MessageType_FIND_ME = 22
+    alox_MessageType_FIND_ME = 22,
+    alox_MessageType_RESTART = 23
 } alox_MessageType;
 
 /* Struct definitions */
@@ -133,6 +134,16 @@ typedef struct _alox_EspNowFindMeResponse {
     uint32_t client_id;
 } alox_EspNowFindMeResponse;
 
+/* * Host → master: restart local node (client_id=0) or ESP-NOW unicast to one slave. */
+typedef struct _alox_RestartRequest {
+    uint32_t client_id;
+} alox_RestartRequest;
+
+typedef struct _alox_RestartResponse {
+    bool success;
+    uint32_t client_id;
+} alox_RestartResponse;
+
 /* Host → device: begin UART OTA (erase inactive OTA slot; device replies OTA_STATUS). */
 typedef struct _alox_OtaStartPayload {
     uint32_t total_size;
@@ -205,6 +216,8 @@ typedef struct _alox_UartMessage {
         alox_LedRingProgressResponse led_ring_progress_response;
         alox_EspNowFindMeRequest espnow_find_me_request;
         alox_EspNowFindMeResponse espnow_find_me_response;
+        alox_RestartRequest restart_request;
+        alox_RestartResponse restart_response;
     } payload;
 } alox_UartMessage;
 
@@ -215,8 +228,8 @@ extern "C" {
 
 /* Helper constants for enums */
 #define _alox_MessageType_MIN alox_MessageType_UNKNOWN
-#define _alox_MessageType_MAX alox_MessageType_FIND_ME
+#define _alox_MessageType_MAX alox_MessageType_RESTART
-#define _alox_MessageType_ARRAYSIZE ((alox_MessageType)(alox_MessageType_FIND_ME+1))
+#define _alox_MessageType_ARRAYSIZE ((alox_MessageType)(alox_MessageType_RESTART+1))
 
 #define alox_UartMessage_type_ENUMTYPE alox_MessageType
 
@@ -240,6 +253,8 @@ extern "C" {
 
 
 
+
+
 
 
 
@@ -260,6 +275,8 @@ extern "C" {
 #define alox_LedRingProgressResponse_init_default {0, 0, 0, 0}
 #define alox_EspNowFindMeRequest_init_default    {0}
 #define alox_EspNowFindMeResponse_init_default   {0, 0}
+#define alox_RestartRequest_init_default         {0}
+#define alox_RestartResponse_init_default        {0, 0}
 #define alox_OtaStartPayload_init_default        {0}
 #define alox_OtaPayload_init_default             {0, {0, {0}}}
 #define alox_OtaEndPayload_init_default          {0}
@@ -283,6 +300,8 @@ extern "C" {
 #define alox_LedRingProgressResponse_init_zero   {0, 0, 0, 0}
 #define alox_EspNowFindMeRequest_init_zero       {0}
 #define alox_EspNowFindMeResponse_init_zero      {0, 0}
+#define alox_RestartRequest_init_zero            {0}
+#define alox_RestartResponse_init_zero           {0, 0}
 #define alox_OtaStartPayload_init_zero           {0}
 #define alox_OtaPayload_init_zero                {0, {0, {0}}}
 #define alox_OtaEndPayload_init_zero             {0}
@@ -337,6 +356,9 @@ extern "C" {
 #define alox_EspNowFindMeRequest_client_id_tag   1
 #define alox_EspNowFindMeResponse_success_tag    1
 #define alox_EspNowFindMeResponse_client_id_tag  2
+#define alox_RestartRequest_client_id_tag        1
+#define alox_RestartResponse_success_tag         1
+#define alox_RestartResponse_client_id_tag       2
 #define alox_OtaStartPayload_total_size_tag      1
 #define alox_OtaPayload_seq_tag                  1
 #define alox_OtaPayload_data_tag                 2
@@ -375,6 +397,8 @@ extern "C" {
 #define alox_UartMessage_led_ring_progress_response_tag 18
 #define alox_UartMessage_espnow_find_me_request_tag 19
 #define alox_UartMessage_espnow_find_me_response_tag 20
+#define alox_UartMessage_restart_request_tag     21
+#define alox_UartMessage_restart_response_tag    22
 
 /* Struct field encoding specification for nanopb */
 #define alox_UartMessage_FIELDLIST(X, a) \
@@ -397,7 +421,9 @@ X(a, STATIC,   ONEOF,    MESSAGE,  (payload,ota_slave_progress_response,payload.
 X(a, STATIC,   ONEOF,    MESSAGE,  (payload,led_ring_progress_request,payload.led_ring_progress_request),  17) \
 X(a, STATIC,   ONEOF,    MESSAGE,  (payload,led_ring_progress_response,payload.led_ring_progress_response),  18) \
 X(a, STATIC,   ONEOF,    MESSAGE,  (payload,espnow_find_me_request,payload.espnow_find_me_request),  19) \
-X(a, STATIC,   ONEOF,    MESSAGE,  (payload,espnow_find_me_response,payload.espnow_find_me_response),  20)
+X(a, STATIC,   ONEOF,    MESSAGE,  (payload,espnow_find_me_response,payload.espnow_find_me_response),  20) \
+X(a, STATIC,   ONEOF,    MESSAGE,  (payload,restart_request,payload.restart_request),  21) \
+X(a, STATIC,   ONEOF,    MESSAGE,  (payload,restart_response,payload.restart_response),  22)
 #define alox_UartMessage_CALLBACK NULL
 #define alox_UartMessage_DEFAULT NULL
 #define alox_UartMessage_payload_ack_payload_MSGTYPE alox_Ack
@@ -419,6 +445,8 @@ X(a, STATIC,   ONEOF,    MESSAGE,  (payload,espnow_find_me_response,payload.espn
 #define alox_UartMessage_payload_led_ring_progress_response_MSGTYPE alox_LedRingProgressResponse
 #define alox_UartMessage_payload_espnow_find_me_request_MSGTYPE alox_EspNowFindMeRequest
 #define alox_UartMessage_payload_espnow_find_me_response_MSGTYPE alox_EspNowFindMeResponse
+#define alox_UartMessage_payload_restart_request_MSGTYPE alox_RestartRequest
+#define alox_UartMessage_payload_restart_response_MSGTYPE alox_RestartResponse
 
 #define alox_Ack_FIELDLIST(X, a) \
 
@@ -528,6 +556,17 @@ X(a, STATIC,   SINGULAR, UINT32,   client_id,         2)
 #define alox_EspNowFindMeResponse_CALLBACK NULL
 #define alox_EspNowFindMeResponse_DEFAULT NULL
 
+#define alox_RestartRequest_FIELDLIST(X, a) \
+X(a, STATIC,   SINGULAR, UINT32,   client_id,         1)
+#define alox_RestartRequest_CALLBACK NULL
+#define alox_RestartRequest_DEFAULT NULL
+
+#define alox_RestartResponse_FIELDLIST(X, a) \
+X(a, STATIC,   SINGULAR, BOOL,     success,           1) \
+X(a, STATIC,   SINGULAR, UINT32,   client_id,         2)
+#define alox_RestartResponse_CALLBACK NULL
+#define alox_RestartResponse_DEFAULT NULL
+
 #define alox_OtaStartPayload_FIELDLIST(X, a) \
 X(a, STATIC,   SINGULAR, UINT32,   total_size,        1)
 #define alox_OtaStartPayload_CALLBACK NULL
@@ -592,6 +631,8 @@ extern const pb_msgdesc_t alox_LedRingProgressRequest_msg;
 extern const pb_msgdesc_t alox_LedRingProgressResponse_msg;
 extern const pb_msgdesc_t alox_EspNowFindMeRequest_msg;
 extern const pb_msgdesc_t alox_EspNowFindMeResponse_msg;
+extern const pb_msgdesc_t alox_RestartRequest_msg;
+extern const pb_msgdesc_t alox_RestartResponse_msg;
 extern const pb_msgdesc_t alox_OtaStartPayload_msg;
 extern const pb_msgdesc_t alox_OtaPayload_msg;
 extern const pb_msgdesc_t alox_OtaEndPayload_msg;
@@ -617,6 +658,8 @@ extern const pb_msgdesc_t alox_OtaSlaveProgressResponse_msg;
 #define alox_LedRingProgressResponse_fields &alox_LedRingProgressResponse_msg
 #define alox_EspNowFindMeRequest_fields &alox_EspNowFindMeRequest_msg
 #define alox_EspNowFindMeResponse_fields &alox_EspNowFindMeResponse_msg
+#define alox_RestartRequest_fields &alox_RestartRequest_msg
+#define alox_RestartResponse_fields &alox_RestartResponse_msg
 #define alox_OtaStartPayload_fields &alox_OtaStartPayload_msg
 #define alox_OtaPayload_fields &alox_OtaPayload_msg
 #define alox_OtaEndPayload_fields &alox_OtaEndPayload_msg
@@ -650,6 +693,8 @@ extern const pb_msgdesc_t alox_OtaSlaveProgressResponse_msg;
 #define alox_OtaSlaveProgressResponse_size       532
 #define alox_OtaStartPayload_size                6
 #define alox_OtaStatusPayload_size               24
+#define alox_RestartRequest_size                 6
+#define alox_RestartResponse_size                8
 
 #ifdef __cplusplus
 } /* extern "C" */

main/proto/uart_messages.proto

@@ -21,6 +21,7 @@ enum MessageType {
   OTA_START_ESPNOW = 20;
   OTA_SLAVE_PROGRESS = 21;
   FIND_ME = 22;
+  RESTART = 23;
 }
 
 message UartMessage {
@@ -45,6 +46,8 @@ message UartMessage {
     LedRingProgressResponse led_ring_progress_response = 18;
     EspNowFindMeRequest espnow_find_me_request = 19;
     EspNowFindMeResponse espnow_find_me_response = 20;
+    RestartRequest restart_request = 21;
+    RestartResponse restart_response = 22;
   }
 }
 
@@ -149,6 +152,16 @@ message EspNowFindMeResponse {
   uint32 client_id = 2;
 }
 
+/** Host → master: restart local node (client_id=0) or ESP-NOW unicast to one slave. */
+message RestartRequest {
+  uint32 client_id = 1;
+}
+
+message RestartResponse {
+  bool success = 1;
+  uint32 client_id = 2;
+}
+
 // Host → device: begin UART OTA (erase inactive OTA slot; device replies OTA_STATUS).
 message OtaStartPayload {
   uint32 total_size = 1;