Add selectable ESP-NOW send path for accel/tap input.

Expose best_effort/fast/wait/reliable via UART, dashboard, and CLI so loss vs latency can be compared under real multi-pod load. Co-authored-by: Cursor <cursoragent@cursor.com>
2026-11-01 22:34:03 +01:00
parent 178ab46cec
commit 1adaddd6c8
25 changed files with 1178 additions and 255 deletions
@@ -38,6 +38,7 @@ go run . -port /dev/ttyUSB0 clients
 | `find-me` | 22 | Locate pod (`-client 0` master, `>0` slave via ESP-NOW) |
 | `restart` | 23 | Reboot master or slave (`-client 0` / `>0`) |
 | `log-level` | `0x1f` | Get/set master ESP-IDF log level for tag `"*"` (`-set`, `-level` 0–5); output on UART0 debug, not host UART |
+| `input-send-mode` | `0x23` | Get/set slave accel/tap ESP-NOW TX path (`-set -mode 0..3`, `-all` or `-client N`): best_effort/fast/wait/reliable |

 `clients` requires slaves to have responded to master discover broadcasts first.

@@ -0,0 +1,100 @@
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+
+	pb "powerpod/gotool/pb"
+)
+
+type inputSendModeAPIResponse struct {
+	Success       bool   `json:"success"`
+	Mode          uint32 `json:"mode"`
+	ModeName      string `json:"mode_name"`
+	ClientID      uint32 `json:"client_id,omitempty"`
+	SlavesUpdated uint32 `json:"slaves_updated,omitempty"`
+	Error         string `json:"error,omitempty"`
+}
+
+func inputSendModeName(mode pb.InputSendMode) string {
+	switch mode {
+	case pb.InputSendMode_INPUT_SEND_BEST_EFFORT:
+		return "best_effort"
+	case pb.InputSendMode_INPUT_SEND_FAST:
+		return "fast"
+	case pb.InputSendMode_INPUT_SEND_WAIT:
+		return "wait"
+	case pb.InputSendMode_INPUT_SEND_RELIABLE:
+		return "reliable"
+	default:
+		return "unknown"
+	}
+}
+
+func mountInputSendModeAPI(mux *http.ServeMux, link *managedSerial) {
+	mux.HandleFunc("/api/input-send-mode", func(w http.ResponseWriter, r *http.Request) {
+		switch r.Method {
+		case http.MethodGet:
+			serveInputSendModeGet(w, link)
+		case http.MethodPut, http.MethodPost:
+			serveInputSendModePut(w, r, link)
+		default:
+			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		}
+	})
+}
+
+func serveInputSendModeGet(w http.ResponseWriter, link *managedSerial) {
+	resp, err := link.InputSendMode(&pb.InputSendModeRequest{Write: false})
+	if err != nil {
+		writeJSON(w, http.StatusBadGateway, inputSendModeAPIResponse{Error: err.Error()})
+		return
+	}
+	writeJSON(w, http.StatusOK, inputSendModeAPIResponse{
+		Success:  resp.GetSuccess(),
+		Mode:     uint32(resp.GetMode()),
+		ModeName: inputSendModeName(resp.GetMode()),
+	})
+}
+
+func serveInputSendModePut(w http.ResponseWriter, r *http.Request, link *managedSerial) {
+	var body struct {
+		Mode       uint32 `json:"mode"`
+		ClientID   uint32 `json:"client_id"`
+		AllClients bool   `json:"all_clients"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+		writeJSON(w, http.StatusBadRequest, inputSendModeAPIResponse{Error: "invalid JSON"})
+		return
+	}
+	if body.Mode > uint32(pb.InputSendMode_INPUT_SEND_RELIABLE) {
+		writeJSON(w, http.StatusBadRequest, inputSendModeAPIResponse{Error: "mode must be 0..3"})
+		return
+	}
+	if !body.AllClients && body.ClientID == 0 {
+		// Dashboard default: apply to every registered slave.
+		body.AllClients = true
+	}
+
+	resp, err := link.InputSendMode(&pb.InputSendModeRequest{
+		Write:      true,
+		Mode:       pb.InputSendMode(body.Mode),
+		ClientId:   body.ClientID,
+		AllClients: body.AllClients,
+	})
+	if err != nil {
+		writeJSON(w, http.StatusBadGateway, inputSendModeAPIResponse{Error: err.Error()})
+		return
+	}
+	status := http.StatusOK
+	if !resp.GetSuccess() {
+		status = http.StatusBadRequest
+	}
+	writeJSON(w, status, inputSendModeAPIResponse{
+		Success:       resp.GetSuccess(),
+		Mode:          uint32(resp.GetMode()),
+		ModeName:      inputSendModeName(resp.GetMode()),
+		ClientID:      resp.GetClientId(),
+		SlavesUpdated: resp.GetSlavesUpdated(),
+	})
+}
@@ -102,6 +102,7 @@ func mountServeAPI(mux *http.ServeMux, link *managedSerial, hub *wsHub, streamCt
 	mountBleTestAPI(mux, link)
 	mountLiveStreamAPI(mux, hub)
 	mountAccelStreamAPI(mux, link, hub, streamCtl)
+	mountInputSendModeAPI(mux, link)
 	mountTapAPI(mux, link, hub, tapCtl)
 	mountTapConfigAPI(mux, link)
 	mountLedRingAPI(mux, link)
@@ -156,7 +156,7 @@ func (m *managedSerial) TapNotifyPoll(req *pb.TapNotifyRequest) (*pb.TapNotifyRe

 func (m *managedSerial) tapNotifyExchange(poll bool, req *pb.TapNotifyRequest) (*pb.TapNotifyResponse, error) {
 	msg := &pb.UartMessage{
-		Type: pb.MessageType_TAP_NOTIFY,
+		Type:    pb.MessageType_TAP_NOTIFY,
 		Payload: &pb.UartMessage_TapNotifyRequest{TapNotifyRequest: req},
 	}
 	body, err := proto.Marshal(msg)
@@ -216,7 +216,7 @@ func decodeCacheStatusPayload(payload []byte) (*pb.CacheStatusResponse, error) {

 func (m *managedSerial) accelStreamExchange(poll bool, req *pb.AccelStreamRequest) (*pb.AccelStreamResponse, error) {
 	msg := &pb.UartMessage{
-		Type: pb.MessageType_ACCEL_STREAM,
+		Type:    pb.MessageType_ACCEL_STREAM,
 		Payload: &pb.UartMessage_AccelStreamRequest{AccelStreamRequest: req},
 	}
 	body, err := proto.Marshal(msg)
@@ -262,7 +262,7 @@ func (m *managedSerial) TapConfigPoll(req *pb.TapConfigRequest) (*pb.TapConfigRe

 func (m *managedSerial) tapConfigExchange(poll bool, req *pb.TapConfigRequest) (*pb.TapConfigResponse, error) {
 	msg := &pb.UartMessage{
-		Type: pb.MessageType_TAP_CONFIG,
+		Type:    pb.MessageType_TAP_CONFIG,
 		Payload: &pb.UartMessage_TapConfigRequest{TapConfigRequest: req},
 	}
 	body, err := proto.Marshal(msg)
@@ -292,7 +292,7 @@ func (m *managedSerial) tapConfigExchange(poll bool, req *pb.TapConfigRequest) (

 func (m *managedSerial) accelDeadzoneExchange(poll bool, req *pb.AccelDeadzoneRequest) (*pb.AccelDeadzoneResponse, error) {
 	msg := &pb.UartMessage{
-		Type: pb.MessageType_ACCEL_DEADZONE,
+		Type:    pb.MessageType_ACCEL_DEADZONE,
 		Payload: &pb.UartMessage_AccelDeadzoneRequest{AccelDeadzoneRequest: req},
 	}
 	body, err := proto.Marshal(msg)
@@ -606,6 +606,10 @@ func (m *managedSerial) SetLogLevel(write bool, level uint32) (*pb.SetLogLevelRe
 	return hostSetLogLevel(m, write, level)
 }

+func (m *managedSerial) InputSendMode(req *pb.InputSendModeRequest) (*pb.InputSendModeResponse, error) {
+	return hostInputSendMode(m, req)
+}
+
 func (m *managedSerial) Restart(clientID uint32) error {
 	if err := hostRestart(m, clientID); err != nil {
 		return err
@@ -0,0 +1,42 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+
+	pb "powerpod/gotool/pb"
+)
+
+func runInputSendModeCmd(h hostConn, args []string) error {
+	fs := flag.NewFlagSet("input-send-mode", flag.ExitOnError)
+	write := fs.Bool("set", false, "write mode to slave(s)")
+	mode := fs.Uint("mode", 0, "0=best_effort 1=fast 2=wait 3=reliable")
+	clientID := fs.Uint("client", 0, "slave client_id (required unless -all)")
+	all := fs.Bool("all", false, "apply to every registered slave")
+	_ = fs.Parse(args)
+
+	req := &pb.InputSendModeRequest{
+		Write:      *write,
+		Mode:       pb.InputSendMode(*mode),
+		ClientId:   uint32(*clientID),
+		AllClients: *all,
+	}
+	if *write && !*all && *clientID == 0 {
+		return fmt.Errorf("need -client N or -all when using -set")
+	}
+	if *write && *mode > uint(pb.InputSendMode_INPUT_SEND_RELIABLE) {
+		return fmt.Errorf("mode must be 0..3")
+	}
+
+	r, err := hostInputSendMode(h, req)
+	if err != nil {
+		return err
+	}
+	fmt.Printf("input-send-mode: success=%v mode=%d (%s) client_id=%d slaves_updated=%d\n",
+		r.GetSuccess(), r.GetMode(), inputSendModeName(r.GetMode()), r.GetClientId(),
+		r.GetSlavesUpdated())
+	if *write && !r.GetSuccess() {
+		return fmt.Errorf("input-send-mode rejected")
+	}
+	return nil
+}
@@ -400,6 +400,37 @@ go run . -port /dev/ttyUSB0 log-level -set -level 3

 Dashboard: Master card → dropdown **ESP Log-Level** with **Lesen** / **Setzen**.

+### Input send mode (slave accel/tap ESP-NOW TX path)
+
+Debug A/B for how slaves transmit `ACCEL_SAMPLE` / `TAP_EVENT`. Default on slaves is `best_effort` (0). Master remembers the last mode for GET; write pushes via ESP-NOW.
+
+```http
+GET /api/input-send-mode
+PUT /api/input-send-mode
+Content-Type: application/json
+{"mode": 2, "all_clients": true}
+```
+
+| `mode` | Path |
+|--------|------|
+| 0 | `best_effort` (fire-and-forget, quiet) |
+| 1 | `fast` (fire-and-forget, logs failures) |
+| 2 | `wait` (send-done + retries) |
+| 3 | `reliable` (OTA-style retries; can stall high-rate accel) |
+
+```json
+{"success": true, "mode": 2, "mode_name": "wait", "slaves_updated": 2}
+```
+
+**CLI:**
+
+```bash
+go run . -port /dev/ttyUSB0 input-send-mode
+go run . -port /dev/ttyUSB0 input-send-mode -set -mode 2 -all
+```
+
+Dashboard: ESP-NOW Slaves toolbar → **Input-Send** dropdown + **Setzen** / **Lesen**.
+
 ### OTA (master host upload, UART or BLE)

 ```http
@@ -455,5 +486,6 @@ Same as external API:
 | Unicast test | `POST /api/unicast-test` |
 | Echo ping | `POST /api/echo-ping` (per-slave latency; UI shows Host ms + ESP ms) |
 | Master log level | `GET` / `POST /api/log-level` or CLI `log-level` |
+| Input-Send mode | `GET` / `PUT /api/input-send-mode` or CLI `input-send-mode` |
 | Tap notify S/D/T | `PUT /api/clients/{id}/tap-notify` |
 | Tap receive (UI) | Live stream + tap notify; see WebSocket doc for external API |
@@ -4,8 +4,8 @@ import (
 	"fmt"
 	"time"

-	pb "powerpod/gotool/pb"
 	"google.golang.org/protobuf/proto"
+	pb "powerpod/gotool/pb"
 )

 // hostConn is the UART or BLE host transport used by CLI commands.
@@ -160,6 +160,33 @@ func hostSetLogLevel(h hostConn, write bool, level uint32) (*pb.SetLogLevelRespo
 	return r, nil
 }

+func hostInputSendMode(h hostConn, req *pb.InputSendModeRequest) (*pb.InputSendModeResponse, error) {
+	msg := &pb.UartMessage{
+		Type: pb.MessageType_INPUT_SEND_MODE,
+		Payload: &pb.UartMessage_InputSendModeRequest{
+			InputSendModeRequest: req,
+		},
+	}
+	body, err := proto.Marshal(msg)
+	if err != nil {
+		return nil, fmt.Errorf("encode: %w", err)
+	}
+	payload := append([]byte{byte(pb.MessageType_INPUT_SEND_MODE)}, body...)
+	respPayload, err := h.exchangePayload(payload, "INPUT_SEND_MODE")
+	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.GetInputSendModeResponse()
+	if r == nil {
+		return nil, fmt.Errorf("missing input_send_mode_response")
+	}
+	return r, nil
+}
+
 func hostLedRing(h hostConn, req *pb.LedRingProgressRequest) (*pb.LedRingProgressResponse, error) {
 	msg := &pb.UartMessage{
 		Type: pb.MessageType_LED_RING,
@@ -34,7 +34,8 @@ func usage() {
 	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")
 	fmt.Fprintf(os.Stderr, "  restart       reboot master or slave (ESP-NOW)\n")
-	fmt.Fprintf(os.Stderr, "  log-level     get/set master ESP-IDF log level (global)\n\n")
+	fmt.Fprintf(os.Stderr, "  log-level     get/set master ESP-IDF log level (global)\n")
+	fmt.Fprintf(os.Stderr, "  input-send-mode  get/set slave accel/tap ESP-NOW send path\n\n")
 	flag.PrintDefaults()
 }

@@ -73,7 +74,7 @@ func main() {
 			bleName:  *bleName,
 			settle:   time.Duration(*bleSettle * float64(time.Second)),
 		}, flag.Args()[1:])
-	case "version", "clients", "client-info", "clients-reset-ids", "clients_reset_ids", "deadzone", "accel-deadzone", "tap-config", "tap_config", "tap-notify", "tap_notify", "cache-status", "cache_status", "accel-stream", "accel_stream", "unicast-test", "unicast_test", "echo-ping", "echo_ping", "ble-rtt", "ble_rtt", "ble-stream", "ble_stream", "led-ring", "led_ring", "find-me", "find_me", "restart", "log-level", "log_level", "ota", "ota-progress", "ota_progress":
+	case "version", "clients", "client-info", "clients-reset-ids", "clients_reset_ids", "deadzone", "accel-deadzone", "tap-config", "tap_config", "tap-notify", "tap_notify", "cache-status", "cache_status", "accel-stream", "accel_stream", "unicast-test", "unicast_test", "echo-ping", "echo_ping", "ble-rtt", "ble_rtt", "ble-stream", "ble_stream", "led-ring", "led_ring", "find-me", "find_me", "restart", "log-level", "log_level", "input-send-mode", "input_send_mode", "ota", "ota-progress", "ota_progress":
 		if *useBLE && *portName != "" {
 			fmt.Fprintf(os.Stderr, "use either -port or -ble, not both\n")
 			os.Exit(2)
@@ -179,6 +180,8 @@ func main() {
 				break
 			}
 			runErr = runLogLevel(sp, flag.Args()[1:])
+		case "input-send-mode", "input_send_mode":
+			runErr = runInputSendModeCmd(h, flag.Args()[1:])
 		case "ota":
 			t, ok := h.(otaTransport)
 			if !ok {
@@ -553,6 +553,8 @@
            <strong>Live-Stream</strong>: UART ≈ <code>CACHE_STATUS</code>-Poll (~16&nbsp;ms); BLE ≈
            <code>BLE_STREAM_TICK</code>-Push. Pro Slave <strong>Accel</strong> aktiviert den ESP-NOW-Stream;
            Tap-Notify (S/D/T) steuert die Tap-Arten auf dem Slave.
+            <strong>Input-Send</strong> wählt den ESP-NOW-TX-Pfad für Accel/Tap auf den Slaves
+            (<code>best_effort</code> Default; <code>wait</code>/<code>reliable</code> blockieren länger).
          </p>
          <div class="px-3 pb-2 d-flex flex-wrap gap-2 align-items-center">
            <button type="button"
@@ -564,6 +566,28 @@
            <span class="text-muted small font-monospace" x-show="isBLEHost() && state.live_stream"
                  x-text="bleTickLabel()"
                  title="Median Δt zwischen BLE_STREAM_TICK (esp_timestamp_us)"></span>
+            <label class="text-muted small mb-0" for="input-send-mode">Input-Send:</label>
+            <select id="input-send-mode" class="form-select form-select-sm"
+                    style="width: auto; min-width: 9rem;"
+                    x-model.number="inputSendMode"
+                    :disabled="busy || !hostUp() || !(state.clients || []).length">
+              <option :value="0">best_effort</option>
+              <option :value="1">fast</option>
+              <option :value="2">wait</option>
+              <option :value="3">reliable</option>
+            </select>
+            <button type="button" class="btn btn-outline-secondary btn-sm"
+                    @click="setInputSendMode(inputSendMode)"
+                    :disabled="busy || !hostUp() || !(state.clients || []).length"
+                    title="Modus an alle registrierten Slaves pushen">
+              Setzen
+            </button>
+            <button type="button" class="btn btn-outline-secondary btn-sm"
+                    @click="readInputSendMode()"
+                    :disabled="busy || !hostUp()"
+                    title="Zuletzt gesetzten Modus vom Master lesen">
+              Lesen
+            </button>
            <span class="text-muted small">Tap alle Slaves:</span>
            <label class="tap-toggle"><input type="checkbox" x-model="allTapSingle" :disabled="busy"> S</label>
            <label class="tap-toggle"><input type="checkbox" x-model="allTapDouble" :disabled="busy"> D</label>
@@ -913,6 +937,7 @@
        masterDz: 100,
        masterDzSeeded: false,
        masterLogLevel: 0,
+        inputSendMode: 0,
        masterTapCfg: {
          tap_sens_thres: 5,
          max_gest_dur: 100,
@@ -1796,6 +1821,52 @@
            this.busy = false;
          }
        },
+        formatInputSendMode(mode) {
+          const labels = ['best_effort', 'fast', 'wait', 'reliable'];
+          if (mode == null || mode < 0 || mode > 3) return '—';
+          return labels[mode];
+        },
+        async readInputSendMode() {
+          this.busy = true;
+          try {
+            const r = await fetch('/api/input-send-mode');
+            const data = await r.json();
+            if (!r.ok || !data.success) {
+              this.flash(data.error || 'Input-Send lesen fehlgeschlagen', false);
+              return;
+            }
+            this.inputSendMode = data.mode ?? 0;
+            this.flash(`Input-Send: ${data.mode_name || this.formatInputSendMode(data.mode)}`, true);
+          } catch (e) {
+            this.flash(String(e), false);
+          } finally {
+            this.busy = false;
+          }
+        },
+        async setInputSendMode(mode) {
+          this.busy = true;
+          try {
+            const r = await fetch('/api/input-send-mode', {
+              method: 'PUT',
+              headers: { 'Content-Type': 'application/json' },
+              body: JSON.stringify({ mode, all_clients: true })
+            });
+            const data = await r.json();
+            if (!r.ok || !data.success) {
+              this.flash(data.error || 'Input-Send setzen fehlgeschlagen', false);
+              return;
+            }
+            this.inputSendMode = data.mode ?? mode;
+            this.flash(
+              `Input-Send ${data.mode_name || this.formatInputSendMode(data.mode)} → ${data.slaves_updated || 0} Slaves`,
+              true
+            );
+          } catch (e) {
+            this.flash(String(e), false);
+          } finally {
+            this.busy = false;
+          }
+        },
        patchClientAccelStream(clientId, enabled) {
          const clients = (this.state.clients || []).map((c) => {
            if (c.id !== clientId) return c;
@@ -22,6 +22,7 @@ idf_component_register(
  "cmd/cmd_client_info.c"
  "cmd/cmd_accel_deadzone.c"
  "cmd/cmd_accel_stream.c"
+  "cmd/cmd_input_send_mode.c"
  "cmd/cmd_tap_notify.c"
  "cmd/cmd_tap_config.c"
  "cmd/cmd_cache_status.c"
@@ -124,7 +124,8 @@ Schema: `proto/esp_now_messages.proto`. Encode/decode: `esp_now_proto.c`. The ES
 | `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_ACCEL_SAMPLE` | Slave → master | `EspNowAccelSample` (`slave_id`, `x`, `y`, `z` raw LSB) — ~every 8 ms, best-effort |
+| `ESPNOW_ACCEL_SAMPLE` | Slave → master | `EspNowAccelSample` (`slave_id`, `x`, `y`, `z` raw LSB) — ~every 10 ms; TX path via `INPUT_SEND_MODE` (default best-effort) |
+| `ESPNOW_SET_INPUT_SEND_MODE` | Master → slave | `EspNowInputSendMode` (`mode` 0..3 = best_effort/fast/wait/reliable) |
 | `ESPNOW_SET_TAP_NOTIFY` | Master → slave | `EspNowTapNotify` (`client_id`, `single`, `double_tap`, `triple`) — which tap kinds to forward |
 | `ESPNOW_TAP_EVENT` | Slave → master | `EspNowTapEvent` (`client_id`, `kind`) — on BMA456 tap interrupt if notify enabled |
 | `ESPNOW_BATTERY_REPORT` | Slave → master | `EspNowBatteryReport` (`client_id`, `lipo1/2` mV) — ~every 30 s; cached in `client_registry` |
@@ -233,6 +234,7 @@ Host and master speak nanopb-encoded `UartMessage` inside UART frames (byte 0 =
 | 22 | `FIND_ME` | Implemented (`cmd/cmd_espnow_find_me.c`) — `client_id=0` local ring, `>0` ESP-NOW to slave |
 | 23 | `RESTART` | Implemented (`cmd/cmd_restart.c`) — `client_id=0` reboot master, `>0` ESP-NOW reboot slave |
 | 25 | `ACCEL_STREAM` | Implemented — enable/disable slave ESP-NOW accel stream to master |
+| 35 | `INPUT_SEND_MODE` | Implemented — get/set slave accel/tap ESP-NOW send path (best_effort/fast/wait/reliable) |
 | 27 | `TAP_NOTIFY` | Implemented (`cmd/cmd_tap_notify.c`) — get/set which tap kinds notify via ESP-NOW |
 | 29 | `CACHE_STATUS` | Implemented (`cmd/cmd_cache_status.c`) — subscribed accel + tap cache (one UART round-trip) |
 | 30 | `ESPNOW_ECHO_PING` | Implemented (`cmd/cmd_espnow_echo_ping.c`) — ESP-NOW timestamp echo (latency test) |
@@ -63,6 +63,10 @@ static const char *message_type_name(uint16_t id) {
    return "SET_LOG_LEVEL";
  case alox_MessageType_TAP_CONFIG:
    return "TAP_CONFIG";
+  case alox_MessageType_CLIENT_ID_MAP_RESET:
+    return "CLIENT_ID_MAP_RESET";
+  case alox_MessageType_INPUT_SEND_MODE:
+    return "INPUT_SEND_MODE";
  default:
    return "UNKNOWN";
  }
@@ -0,0 +1,109 @@
+#include "cmd_input_send_mode.h"
+#include "client_registry.h"
+#include "esp_log.h"
+#include "esp_now_comm.h"
+#include "uart_cmd.h"
+
+static const char *TAG = "[INPUT_SEND]";
+
+/** Last mode pushed from host (GET returns this; slaves may lag until re-push). */
+static alox_InputSendMode s_mode = alox_InputSendMode_INPUT_SEND_BEST_EFFORT;
+
+static bool valid_mode(alox_InputSendMode mode) {
+  return mode <= alox_InputSendMode_INPUT_SEND_RELIABLE;
+}
+
+static void reply(bool success, alox_InputSendMode mode, uint32_t client_id,
+                  uint32_t slaves_updated) {
+  alox_UartMessage response;
+  uart_cmd_init_response(&response, alox_MessageType_INPUT_SEND_MODE,
+                         alox_UartMessage_input_send_mode_response_tag);
+  response.payload.input_send_mode_response.success = success;
+  response.payload.input_send_mode_response.mode = mode;
+  response.payload.input_send_mode_response.client_id = client_id;
+  response.payload.input_send_mode_response.slaves_updated = slaves_updated;
+  uart_cmd_send(&response, TAG);
+}
+
+static esp_err_t push_mode_to_slave(const client_info_t *client,
+                                    alox_InputSendMode mode) {
+  if (client == NULL) {
+    return ESP_ERR_INVALID_ARG;
+  }
+  return esp_now_comm_send_input_send_mode(client->mac, client->id,
+                                           (uint32_t)mode);
+}
+
+static void handle_input_send_mode(const uint8_t *data, size_t len) {
+  alox_UartMessage uart_msg;
+  alox_InputSendModeRequest req = alox_InputSendModeRequest_init_zero;
+
+  if (len > 0) {
+    if (uart_cmd_decode(data, len, &uart_msg) != ESP_OK) {
+      ESP_LOGW(TAG, "decode failed");
+      reply(false, s_mode, 0, 0);
+      return;
+    }
+    const alox_InputSendModeRequest *req_ptr =
+        UART_CMD_REQ(&uart_msg, alox_UartMessage_input_send_mode_request_tag,
+                     input_send_mode_request);
+    if (req_ptr == NULL) {
+      ESP_LOGW(TAG, "missing input_send_mode_request");
+      reply(false, s_mode, 0, 0);
+      return;
+    }
+    req = *req_ptr;
+  }
+
+  if (req.write) {
+    if (!valid_mode(req.mode)) {
+      ESP_LOGW(TAG, "invalid mode %lu", (unsigned long)req.mode);
+      reply(false, s_mode, req.client_id, 0);
+      return;
+    }
+
+    if (req.all_clients) {
+      uint32_t sent = 0;
+      for (size_t i = 0; i < client_registry_count(); i++) {
+        const client_info_t *client = client_registry_at(i);
+        if (client == NULL) {
+          continue;
+        }
+        if (push_mode_to_slave(client, req.mode) == ESP_OK) {
+          sent++;
+        }
+      }
+      s_mode = req.mode;
+      ESP_LOGI(TAG, "input send mode %lu for %u slaves",
+               (unsigned long)req.mode, (unsigned)sent);
+      reply(sent > 0 || client_registry_count() == 0, req.mode, 0, sent);
+      return;
+    }
+
+    if (req.client_id == 0) {
+      ESP_LOGW(TAG, "client_id required (or all_clients)");
+      reply(false, req.mode, 0, 0);
+      return;
+    }
+
+    const client_info_t *client = client_registry_find_by_id(req.client_id);
+    if (client == NULL) {
+      ESP_LOGW(TAG, "client id %lu not found", (unsigned long)req.client_id);
+      reply(false, req.mode, req.client_id, 0);
+      return;
+    }
+
+    esp_err_t err = push_mode_to_slave(client, req.mode);
+    if (err == ESP_OK) {
+      s_mode = req.mode;
+    }
+    reply(err == ESP_OK, req.mode, req.client_id, err == ESP_OK ? 1u : 0u);
+    return;
+  }
+
+  reply(true, s_mode, 0, 0);
+}
+
+void cmd_input_send_mode_register(void) {
+  uart_cmd_register(alox_MessageType_INPUT_SEND_MODE, handle_input_send_mode);
+}
@@ -0,0 +1,6 @@
+#ifndef CMD_INPUT_SEND_MODE_H
+#define CMD_INPUT_SEND_MODE_H
+
+void cmd_input_send_mode_register(void);
+
+#endif
@@ -13,6 +13,10 @@ esp_err_t esp_now_comm_init(const app_config_t *config);
 esp_err_t esp_now_comm_send_accel_stream(const uint8_t mac[CLIENT_MAC_LEN],
                                         uint32_t client_id, bool enable);

+/** Master: set accel/tap ESP-NOW send path on one slave (InputSendMode). */
+esp_err_t esp_now_comm_send_input_send_mode(const uint8_t mac[CLIENT_MAC_LEN],
+                                            uint32_t client_id, uint32_t mode);
+
 /** Master: configure tap notify flags on one slave. */
 esp_err_t esp_now_comm_send_tap_notify(const uint8_t mac[CLIENT_MAC_LEN],
                                       uint32_t client_id, bool single,
@@ -37,6 +37,16 @@ static esp_err_t send_accel_stream(const uint8_t *dest_mac, uint32_t client_id,
  return esp_now_core_send(dest_mac, &msg);
 }

+static esp_err_t send_input_send_mode(const uint8_t *dest_mac,
+                                      uint32_t client_id, uint32_t mode) {
+  alox_EspNowMessage msg = alox_EspNowMessage_init_zero;
+  msg.type = alox_EspNowMessageType_ESPNOW_SET_INPUT_SEND_MODE;
+  msg.which_payload = alox_EspNowMessage_input_send_mode_tag;
+  msg.payload.input_send_mode.client_id = client_id;
+  msg.payload.input_send_mode.mode = mode;
+  return esp_now_core_send(dest_mac, &msg);
+}
+
 static esp_err_t send_accel_deadzone(const uint8_t *dest_mac, uint32_t client_id,
                                     uint32_t deadzone) {
  alox_EspNowMessage msg = alox_EspNowMessage_init_zero;
@@ -446,6 +456,24 @@ esp_err_t esp_now_comm_send_accel_stream(const uint8_t mac[CLIENT_MAC_LEN],
  return err;
 }

+esp_err_t esp_now_comm_send_input_send_mode(const uint8_t mac[CLIENT_MAC_LEN],
+                                            uint32_t client_id, uint32_t mode) {
+  if (mac == NULL || !esp_now_core_is_master()) {
+    return ESP_ERR_INVALID_STATE;
+  }
+  char mac_str[18];
+  esp_now_core_mac_to_str(mac, mac_str, sizeof(mac_str));
+  esp_err_t err = send_input_send_mode(mac, client_id, mode);
+  if (err == ESP_OK) {
+    ESP_LOGI(TAG, "unicast SET_INPUT_SEND_MODE to %s: mode=%lu client_id=%lu",
+             mac_str, (unsigned long)mode, (unsigned long)client_id);
+  } else {
+    ESP_LOGW(TAG, "unicast SET_INPUT_SEND_MODE to %s failed: %s", mac_str,
+             esp_err_to_name(err));
+  }
+  return err;
+}
+
 esp_err_t esp_now_comm_send_tap_notify(const uint8_t mac[CLIENT_MAC_LEN],
                                       uint32_t client_id, bool single,
                                       bool double_tap, bool triple) {
@@ -24,9 +24,9 @@
 /** While master or slave OTA is in progress (discover may be sparse). */
 #define SLAVE_MASTER_OTA_GRACE_MS 300000u
 /**
- * Best-effort gaming input cadence (loss OK; send_best_effort).
- * Must be >= one FreeRTOS tick (CONFIG_FREERTOS_HZ=100 → 10 ms); shorter
- * values become 0 ticks and assert in vTaskDelayUntil.
+ * Accel stream cadence. TX path is selectable (INPUT_SEND_MODE; default
+ * best_effort). Must be >= one FreeRTOS tick (CONFIG_FREERTOS_HZ=100 → 10 ms);
+ * shorter values become 0 ticks and assert in vTaskDelayUntil.
 */
 #define ESPNOW_ACCEL_INTERVAL_MS 10
 #define ESPNOW_BATTERY_INTERVAL_MS 30000
@@ -40,6 +40,9 @@ static bool s_accel_stream_enabled;
 static bool s_tap_notify_single;
 static bool s_tap_notify_double;
 static bool s_tap_notify_triple;
+/** Accel/tap TX path; default matches historical best-effort gaming input. */
+static uint32_t s_input_send_mode =
+    (uint32_t)alox_InputSendMode_INPUT_SEND_BEST_EFFORT;
 static uint8_t s_master_mac[ESP_NOW_ETH_ALEN];
 static uint32_t s_last_discover_ms;
 /** Logical id assigned by current/last master (0 = unbound). */
@@ -161,6 +164,21 @@ static void send_presence(const uint8_t *dest_mac, alox_EspNowMessageType type)
  esp_now_core_send(dest_mac, &msg);
 }

+static esp_err_t send_input_message(const uint8_t *dest_mac,
+                                    const alox_EspNowMessage *msg) {
+  switch (s_input_send_mode) {
+  case (uint32_t)alox_InputSendMode_INPUT_SEND_FAST:
+    return esp_now_core_send_fast(dest_mac, msg);
+  case (uint32_t)alox_InputSendMode_INPUT_SEND_WAIT:
+    return esp_now_core_send_wait(dest_mac, msg);
+  case (uint32_t)alox_InputSendMode_INPUT_SEND_RELIABLE:
+    return esp_now_core_send_reliable(dest_mac, msg);
+  case (uint32_t)alox_InputSendMode_INPUT_SEND_BEST_EFFORT:
+  default:
+    return esp_now_core_send_best_effort(dest_mac, msg);
+  }
+}
+
 static esp_err_t send_accel_sample(const uint8_t *dest_mac, uint32_t slave_id,
                                   int16_t x, int16_t y, int16_t z) {
  alox_EspNowMessage msg = alox_EspNowMessage_init_zero;
@@ -170,8 +188,7 @@ static esp_err_t send_accel_sample(const uint8_t *dest_mac, uint32_t slave_id,
  msg.payload.accel_sample.x = x;
  msg.payload.accel_sample.y = y;
  msg.payload.accel_sample.z = z;
-  /* Fire-and-forget: controller input prefers low latency over delivery. */
-  return esp_now_core_send_best_effort(dest_mac, &msg);
+  return send_input_message(dest_mac, &msg);
 }

 static esp_err_t send_tap_event(const uint8_t *dest_mac, uint32_t slave_id,
@@ -181,7 +198,7 @@ static esp_err_t send_tap_event(const uint8_t *dest_mac, uint32_t slave_id,
  msg.which_payload = alox_EspNowMessage_tap_event_tag;
  msg.payload.tap_event.slave_id = slave_id;
  msg.payload.tap_event.kind = kind;
-  return esp_now_core_send_best_effort(dest_mac, &msg);
+  return send_input_message(dest_mac, &msg);
 }

 static esp_err_t send_battery_report(const uint8_t *dest_mac,
@@ -429,6 +446,43 @@ static void handle_accel_stream(const uint8_t *master_mac,
           cfg->enable ? "on" : "off", mac_str, (unsigned long)my_client_id());
 }

+static const char *input_send_mode_name(uint32_t mode) {
+  switch (mode) {
+  case (uint32_t)alox_InputSendMode_INPUT_SEND_BEST_EFFORT:
+    return "best_effort";
+  case (uint32_t)alox_InputSendMode_INPUT_SEND_FAST:
+    return "fast";
+  case (uint32_t)alox_InputSendMode_INPUT_SEND_WAIT:
+    return "wait";
+  case (uint32_t)alox_InputSendMode_INPUT_SEND_RELIABLE:
+    return "reliable";
+  default:
+    return "unknown";
+  }
+}
+
+static void handle_input_send_mode(const uint8_t *master_mac,
+                                   const alox_EspNowInputSendMode *cfg) {
+  if (!client_id_matches(cfg->client_id)) {
+    return;
+  }
+  if (s_joined && !esp_now_core_mac_equal(master_mac, s_master_mac)) {
+    return;
+  }
+  if (cfg->mode > (uint32_t)alox_InputSendMode_INPUT_SEND_RELIABLE) {
+    ESP_LOGW(TAG, "input send mode %lu invalid (id=%lu)",
+             (unsigned long)cfg->mode, (unsigned long)my_client_id());
+    return;
+  }
+  s_input_send_mode = cfg->mode;
+  char mac_str[18];
+  esp_now_core_mac_to_str(master_mac, mac_str, sizeof(mac_str));
+  ESP_LOGI(TAG, "input send mode %s (%lu) from master %s (id=%lu)",
+           input_send_mode_name(s_input_send_mode),
+           (unsigned long)s_input_send_mode, mac_str,
+           (unsigned long)my_client_id());
+}
+
 static void handle_tap_notify(const uint8_t *master_mac,
                              const alox_EspNowTapNotify *cfg) {
  if (!client_id_matches(cfg->client_id)) {
@@ -585,7 +639,7 @@ static void check_master_timeout(void) {
 static void accel_stream_task(void *param) {
  (void)param;

-  ESP_LOGI(TAG, "accel stream task (interval %u ms, best-effort)",
+  ESP_LOGI(TAG, "accel stream task (interval %u ms, mode selectable)",
           (unsigned)ESPNOW_ACCEL_INTERVAL_MS);

  TickType_t last_wake = xTaskGetTickCount();
@@ -733,6 +787,11 @@ void esp_now_slave_on_recv(const esp_now_recv_info_t *info, const uint8_t *data,
      handle_tap_notify(info->src_addr, &msg.payload.tap_notify);
    }
    break;
+  case alox_EspNowMessage_input_send_mode_tag:
+    if (from_joined_master(info->src_addr)) {
+      handle_input_send_mode(info->src_addr, &msg.payload.input_send_mode);
+    }
+    break;
  case alox_EspNowMessage_battery_query_tag:
    if (from_joined_master(info->src_addr)) {
      handle_battery_query(info->src_addr, &msg.payload.battery_query);
@@ -2,6 +2,7 @@
 #include "cmd_handler.h"
 #include "cmd_accel_deadzone.h"
 #include "cmd_accel_stream.h"
+#include "cmd_input_send_mode.h"
 #include "cmd_tap_notify.h"
 #include "cmd_tap_config.h"
 #include "cmd_cache_status.h"
@@ -221,6 +222,7 @@ void app_main(void) {
    cmd_client_info_register();
    cmd_accel_deadzone_register();
    cmd_accel_stream_register();
+    cmd_input_send_mode_register();
    cmd_tap_notify_register();
    cmd_tap_config_register();
    cmd_cache_status_register();
@@ -54,6 +54,9 @@ PB_BIND(alox_EspNowTapConfig, alox_EspNowTapConfig, AUTO)
 PB_BIND(alox_EspNowTapEvent, alox_EspNowTapEvent, AUTO)


+PB_BIND(alox_EspNowInputSendMode, alox_EspNowInputSendMode, AUTO)
+
+
 PB_BIND(alox_EspNowBatteryReport, alox_EspNowBatteryReport, AUTO)


@@ -36,7 +36,9 @@ typedef enum _alox_EspNowMessageType {
    /* * Master → slave: assigned logical client id after join/presence. */
    alox_EspNowMessageType_ESPNOW_ASSIGN_ID = 22,
    /* * Master → slave: forget persisted master/id binding (debug reset). */
-    alox_EspNowMessageType_ESPNOW_CLEAR_ID_BINDING = 23
+    alox_EspNowMessageType_ESPNOW_CLEAR_ID_BINDING = 23,
+    /* * Master → slave: accel/tap ESP-NOW send path (best_effort/fast/wait/reliable). */
+    alox_EspNowMessageType_ESPNOW_SET_INPUT_SEND_MODE = 24
 } alox_EspNowMessageType;

 /* Struct definitions */
@@ -147,6 +149,14 @@ typedef struct _alox_EspNowTapEvent {
    uint32_t kind;
 } alox_EspNowTapEvent;

+/* *
+ Master → slave: which esp_now_core_send_* path to use for ACCEL_SAMPLE / TAP_EVENT.
+ Values match uart InputSendMode (0=best_effort … 3=reliable). */
+typedef struct _alox_EspNowInputSendMode {
+    uint32_t client_id; /* 0 = all slaves; otherwise only matching slave_id applies */
+    uint32_t mode;
+} alox_EspNowInputSendMode;
+
 /* * Slave → master: LiPo voltages (periodic ~30 s and on query). */
 typedef struct _alox_EspNowBatteryReport {
    uint32_t client_id;
@@ -221,6 +231,7 @@ typedef struct _alox_EspNowMessage {
        alox_EspNowTapConfig tap_config;
        alox_EspNowAssignId assign_id;
        alox_EspNowClearIdBinding clear_id_binding;
+        alox_EspNowInputSendMode input_send_mode;
    } payload;
 } alox_EspNowMessage;

@@ -231,8 +242,9 @@ extern "C" {

 /* Helper constants for enums */
 #define _alox_EspNowMessageType_MIN alox_EspNowMessageType_ESPNOW_UNKNOWN
-#define _alox_EspNowMessageType_MAX alox_EspNowMessageType_ESPNOW_CLEAR_ID_BINDING
-#define _alox_EspNowMessageType_ARRAYSIZE ((alox_EspNowMessageType)(alox_EspNowMessageType_ESPNOW_CLEAR_ID_BINDING+1))
+#define _alox_EspNowMessageType_MAX alox_EspNowMessageType_ESPNOW_SET_INPUT_SEND_MODE
+#define _alox_EspNowMessageType_ARRAYSIZE ((alox_EspNowMessageType)(alox_EspNowMessageType_ESPNOW_SET_INPUT_SEND_MODE+1))
+



@@ -276,6 +288,7 @@ extern "C" {
 #define alox_EspNowTapNotify_init_default        {0, 0, 0, 0}
 #define alox_EspNowTapConfig_init_default        {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
 #define alox_EspNowTapEvent_init_default         {0, 0}
+#define alox_EspNowInputSendMode_init_default    {0, 0}
 #define alox_EspNowBatteryReport_init_default    {0, 0, 0, 0, 0}
 #define alox_EspNowLedRing_init_default          {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
 #define alox_EspNowOtaStart_init_default         {0}
@@ -299,6 +312,7 @@ extern "C" {
 #define alox_EspNowTapNotify_init_zero           {0, 0, 0, 0}
 #define alox_EspNowTapConfig_init_zero           {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
 #define alox_EspNowTapEvent_init_zero            {0, 0}
+#define alox_EspNowInputSendMode_init_zero       {0, 0}
 #define alox_EspNowBatteryReport_init_zero       {0, 0, 0, 0, 0}
 #define alox_EspNowLedRing_init_zero             {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
 #define alox_EspNowOtaStart_init_zero            {0}
@@ -349,6 +363,8 @@ extern "C" {
 #define alox_EspNowTapConfig_enable_triple_tag   10
 #define alox_EspNowTapEvent_slave_id_tag         1
 #define alox_EspNowTapEvent_kind_tag             2
+#define alox_EspNowInputSendMode_client_id_tag   1
+#define alox_EspNowInputSendMode_mode_tag        2
 #define alox_EspNowBatteryReport_client_id_tag   1
 #define alox_EspNowBatteryReport_lipo1_valid_tag 2
 #define alox_EspNowBatteryReport_lipo2_valid_tag 3
@@ -394,6 +410,7 @@ extern "C" {
 #define alox_EspNowMessage_tap_config_tag        22
 #define alox_EspNowMessage_assign_id_tag         23
 #define alox_EspNowMessage_clear_id_binding_tag  24
+#define alox_EspNowMessage_input_send_mode_tag   25

 /* Struct field encoding specification for nanopb */
 #define alox_EspNowUnicastTest_FIELDLIST(X, a) \
@@ -502,6 +519,12 @@ X(a, STATIC,   SINGULAR, UINT32,   kind,              2)
 #define alox_EspNowTapEvent_CALLBACK NULL
 #define alox_EspNowTapEvent_DEFAULT NULL

+#define alox_EspNowInputSendMode_FIELDLIST(X, a) \
+X(a, STATIC,   SINGULAR, UINT32,   client_id,         1) \
+X(a, STATIC,   SINGULAR, UINT32,   mode,              2)
+#define alox_EspNowInputSendMode_CALLBACK NULL
+#define alox_EspNowInputSendMode_DEFAULT NULL
+
 #define alox_EspNowBatteryReport_FIELDLIST(X, a) \
 X(a, STATIC,   SINGULAR, UINT32,   client_id,         1) \
 X(a, STATIC,   SINGULAR, BOOL,     lipo1_valid,       2) \
@@ -572,7 +595,8 @@ X(a, STATIC,   ONEOF,    MESSAGE,  (payload,echo_ping,payload.echo_ping),  20) \
 X(a, STATIC,   ONEOF,    MESSAGE,  (payload,echo_pong,payload.echo_pong),  21) \
 X(a, STATIC,   ONEOF,    MESSAGE,  (payload,tap_config,payload.tap_config),  22) \
 X(a, STATIC,   ONEOF,    MESSAGE,  (payload,assign_id,payload.assign_id),  23) \
-X(a, STATIC,   ONEOF,    MESSAGE,  (payload,clear_id_binding,payload.clear_id_binding),  24)
+X(a, STATIC,   ONEOF,    MESSAGE,  (payload,clear_id_binding,payload.clear_id_binding),  24) \
+X(a, STATIC,   ONEOF,    MESSAGE,  (payload,input_send_mode,payload.input_send_mode),  25)
 #define alox_EspNowMessage_CALLBACK NULL
 #define alox_EspNowMessage_DEFAULT NULL
 #define alox_EspNowMessage_payload_discover_MSGTYPE alox_EspNowDiscover
@@ -598,6 +622,7 @@ X(a, STATIC,   ONEOF,    MESSAGE,  (payload,clear_id_binding,payload.clear_id_bi
 #define alox_EspNowMessage_payload_tap_config_MSGTYPE alox_EspNowTapConfig
 #define alox_EspNowMessage_payload_assign_id_MSGTYPE alox_EspNowAssignId
 #define alox_EspNowMessage_payload_clear_id_binding_MSGTYPE alox_EspNowClearIdBinding
+#define alox_EspNowMessage_payload_input_send_mode_MSGTYPE alox_EspNowInputSendMode

 extern const pb_msgdesc_t alox_EspNowUnicastTest_msg;
 extern const pb_msgdesc_t alox_EspNowEchoPing_msg;
@@ -615,6 +640,7 @@ extern const pb_msgdesc_t alox_EspNowBatteryQuery_msg;
 extern const pb_msgdesc_t alox_EspNowTapNotify_msg;
 extern const pb_msgdesc_t alox_EspNowTapConfig_msg;
 extern const pb_msgdesc_t alox_EspNowTapEvent_msg;
+extern const pb_msgdesc_t alox_EspNowInputSendMode_msg;
 extern const pb_msgdesc_t alox_EspNowBatteryReport_msg;
 extern const pb_msgdesc_t alox_EspNowLedRing_msg;
 extern const pb_msgdesc_t alox_EspNowOtaStart_msg;
@@ -640,6 +666,7 @@ extern const pb_msgdesc_t alox_EspNowMessage_msg;
 #define alox_EspNowTapNotify_fields &alox_EspNowTapNotify_msg
 #define alox_EspNowTapConfig_fields &alox_EspNowTapConfig_msg
 #define alox_EspNowTapEvent_fields &alox_EspNowTapEvent_msg
+#define alox_EspNowInputSendMode_fields &alox_EspNowInputSendMode_msg
 #define alox_EspNowBatteryReport_fields &alox_EspNowBatteryReport_msg
 #define alox_EspNowLedRing_fields &alox_EspNowLedRing_msg
 #define alox_EspNowOtaStart_fields &alox_EspNowOtaStart_msg
@@ -663,6 +690,7 @@ extern const pb_msgdesc_t alox_EspNowMessage_msg;
 #define alox_EspNowEchoPing_size                 22
 #define alox_EspNowEchoPong_size                 22
 #define alox_EspNowFindMe_size                   6
+#define alox_EspNowInputSendMode_size            12
 #define alox_EspNowLedRing_size                  60
 #define alox_EspNowOtaEnd_size                   0
 #define alox_EspNowOtaPayload_size               209
@@ -31,6 +31,8 @@ enum EspNowMessageType {
  ESPNOW_ASSIGN_ID = 22;
  /** Master → slave: forget persisted master/id binding (debug reset). */
  ESPNOW_CLEAR_ID_BINDING = 23;
+  /** Master → slave: accel/tap ESP-NOW send path (best_effort/fast/wait/reliable). */
+  ESPNOW_SET_INPUT_SEND_MODE = 24;
 }

 message EspNowUnicastTest {
@@ -138,6 +140,15 @@ message EspNowTapEvent {
  uint32 kind = 2;
 }

+/**
+ * Master → slave: which esp_now_core_send_* path to use for ACCEL_SAMPLE / TAP_EVENT.
+ * Values match uart InputSendMode (0=best_effort … 3=reliable).
+ */
+message EspNowInputSendMode {
+  uint32 client_id = 1; // 0 = all slaves; otherwise only matching slave_id applies
+  uint32 mode = 2;
+}
+
 /** Slave → master: LiPo voltages (periodic ~30 s and on query). */
 message EspNowBatteryReport {
  uint32 client_id = 1;
@@ -208,5 +219,6 @@ message EspNowMessage {
    EspNowTapConfig tap_config = 22;
    EspNowAssignId assign_id = 23;
    EspNowClearIdBinding clear_id_binding = 24;
+    EspNowInputSendMode input_send_mode = 25;
  }
 }
@@ -42,6 +42,12 @@ PB_BIND(alox_AccelStreamRequest, alox_AccelStreamRequest, AUTO)
 PB_BIND(alox_AccelStreamResponse, alox_AccelStreamResponse, AUTO)


+PB_BIND(alox_InputSendModeRequest, alox_InputSendModeRequest, AUTO)
+
+
+PB_BIND(alox_InputSendModeResponse, alox_InputSendModeResponse, AUTO)
+
+
 PB_BIND(alox_BatteryStatusRequest, alox_BatteryStatusRequest, AUTO)


@@ -158,3 +164,5 @@ PB_BIND(alox_OtaSlaveProgressResponse, alox_OtaSlaveProgressResponse, 2)



+
+
@@ -44,9 +44,23 @@ typedef enum _alox_MessageType {
    /* *
 Host → device: clear master client-id NVS map + live registry (and notify
 online slaves), or on a slave clear local master/id binding only. */
-    alox_MessageType_CLIENT_ID_MAP_RESET = 34
+    alox_MessageType_CLIENT_ID_MAP_RESET = 34,
+    /* *
+ Host → master: get/set slave ESP-NOW send path for accel/tap
+ (best_effort / fast / wait / reliable). */
+    alox_MessageType_INPUT_SEND_MODE = 35
 } alox_MessageType;

+/* *
+ Slave ESP-NOW TX path for ACCEL_SAMPLE / TAP_EVENT (debug A/B).
+ Maps 1:1 to esp_now_core_send_*. */
+typedef enum _alox_InputSendMode {
+    alox_InputSendMode_INPUT_SEND_BEST_EFFORT = 0,
+    alox_InputSendMode_INPUT_SEND_FAST = 1,
+    alox_InputSendMode_INPUT_SEND_WAIT = 2,
+    alox_InputSendMode_INPUT_SEND_RELIABLE = 3
+} alox_InputSendMode;
+
 typedef enum _alox_TapKind {
    alox_TapKind_TAP_NONE = 0,
    alox_TapKind_TAP_SINGLE = 1,
@@ -136,6 +150,23 @@ typedef struct _alox_AccelStreamResponse {
    uint32_t slaves_updated;
 } alox_AccelStreamResponse;

+/* Host → master: get/set input send mode on slaves.
+ write=false: return last mode remembered on master (client_id ignored).
+ write=true: push mode via ESP-NOW (all_clients or one client_id). */
+typedef struct _alox_InputSendModeRequest {
+    bool write;
+    alox_InputSendMode mode;
+    uint32_t client_id;
+    bool all_clients;
+} alox_InputSendModeRequest;
+
+typedef struct _alox_InputSendModeResponse {
+    bool success;
+    alox_InputSendMode mode;
+    uint32_t client_id;
+    uint32_t slaves_updated;
+} alox_InputSendModeResponse;
+
 /* * Host → master: read LiPo ADC voltages (master local and/or slaves via ESP-NOW). */
 typedef struct _alox_BatteryStatusRequest {
    /* * 0 = master only; >0 = one slave; ignored when all_clients */
@@ -380,7 +411,7 @@ typedef struct _alox_TapConfigResponse {
    bool enable_triple;
 } alox_TapConfigResponse;

-/* Host → device: begin UART OTA (erase inactive OTA slot; device replies OTA_STATUS). */
+/* Host → device: begin host OTA over UART or BLE (erase inactive OTA slot; device replies OTA_STATUS). */
 typedef struct _alox_OtaStartPayload {
    uint32_t total_size;
 } alox_OtaStartPayload;
@@ -471,6 +502,8 @@ typedef struct _alox_UartMessage {
        alox_BleStreamTick ble_stream_tick;
        alox_ClientIdMapResetRequest client_id_map_reset_request;
        alox_ClientIdMapResetResponse client_id_map_reset_response;
+        alox_InputSendModeRequest input_send_mode_request;
+        alox_InputSendModeResponse input_send_mode_response;
    } payload;
 } alox_UartMessage;

@@ -481,8 +514,12 @@ extern "C" {

 /* Helper constants for enums */
 #define _alox_MessageType_MIN alox_MessageType_UNKNOWN
-#define _alox_MessageType_MAX alox_MessageType_CLIENT_ID_MAP_RESET
-#define _alox_MessageType_ARRAYSIZE ((alox_MessageType)(alox_MessageType_CLIENT_ID_MAP_RESET+1))
+#define _alox_MessageType_MAX alox_MessageType_INPUT_SEND_MODE
+#define _alox_MessageType_ARRAYSIZE ((alox_MessageType)(alox_MessageType_INPUT_SEND_MODE+1))
+
+#define _alox_InputSendMode_MIN alox_InputSendMode_INPUT_SEND_BEST_EFFORT
+#define _alox_InputSendMode_MAX alox_InputSendMode_INPUT_SEND_RELIABLE
+#define _alox_InputSendMode_ARRAYSIZE ((alox_InputSendMode)(alox_InputSendMode_INPUT_SEND_RELIABLE+1))

 #define _alox_TapKind_MIN alox_TapKind_TAP_NONE
 #define _alox_TapKind_MAX alox_TapKind_TAP_TRIPLE
@@ -501,6 +538,10 @@ extern "C" {



+#define alox_InputSendModeRequest_mode_ENUMTYPE alox_InputSendMode
+
+#define alox_InputSendModeResponse_mode_ENUMTYPE alox_InputSendMode
+



@@ -554,6 +595,8 @@ extern "C" {
 #define alox_AccelDeadzoneResponse_init_default  {0, 0, 0, 0}
 #define alox_AccelStreamRequest_init_default     {0, 0, 0, 0, 0}
 #define alox_AccelStreamResponse_init_default    {0, 0, 0, 0}
+#define alox_InputSendModeRequest_init_default   {0, _alox_InputSendMode_MIN, 0, 0}
+#define alox_InputSendModeResponse_init_default  {0, _alox_InputSendMode_MIN, 0, 0}
 #define alox_BatteryStatusRequest_init_default   {0, 0}
 #define alox_LipoReading_init_default            {0, 0}
 #define alox_BatterySample_init_default          {0, false, alox_LipoReading_init_default, false, alox_LipoReading_init_default, 0}
@@ -603,6 +646,8 @@ extern "C" {
 #define alox_AccelDeadzoneResponse_init_zero     {0, 0, 0, 0}
 #define alox_AccelStreamRequest_init_zero        {0, 0, 0, 0, 0}
 #define alox_AccelStreamResponse_init_zero       {0, 0, 0, 0}
+#define alox_InputSendModeRequest_init_zero      {0, _alox_InputSendMode_MIN, 0, 0}
+#define alox_InputSendModeResponse_init_zero     {0, _alox_InputSendMode_MIN, 0, 0}
 #define alox_BatteryStatusRequest_init_zero      {0, 0}
 #define alox_LipoReading_init_zero               {0, 0}
 #define alox_BatterySample_init_zero             {0, false, alox_LipoReading_init_zero, false, alox_LipoReading_init_zero, 0}
@@ -680,6 +725,14 @@ extern "C" {
 #define alox_AccelStreamResponse_client_id_tag   2
 #define alox_AccelStreamResponse_success_tag     3
 #define alox_AccelStreamResponse_slaves_updated_tag 4
+#define alox_InputSendModeRequest_write_tag      1
+#define alox_InputSendModeRequest_mode_tag       2
+#define alox_InputSendModeRequest_client_id_tag  3
+#define alox_InputSendModeRequest_all_clients_tag 4
+#define alox_InputSendModeResponse_success_tag   1
+#define alox_InputSendModeResponse_mode_tag      2
+#define alox_InputSendModeResponse_client_id_tag 3
+#define alox_InputSendModeResponse_slaves_updated_tag 4
 #define alox_BatteryStatusRequest_client_id_tag  1
 #define alox_BatteryStatusRequest_all_clients_tag 2
 #define alox_LipoReading_valid_tag               1
@@ -846,6 +899,8 @@ extern "C" {
 #define alox_UartMessage_ble_stream_tick_tag     41
 #define alox_UartMessage_client_id_map_reset_request_tag 42
 #define alox_UartMessage_client_id_map_reset_response_tag 43
+#define alox_UartMessage_input_send_mode_request_tag 44
+#define alox_UartMessage_input_send_mode_response_tag 45

 /* Struct field encoding specification for nanopb */
 #define alox_UartMessage_FIELDLIST(X, a) \
@@ -887,7 +942,9 @@ X(a, STATIC,   ONEOF,    MESSAGE,  (payload,tap_config_request,payload.tap_confi
 X(a, STATIC,   ONEOF,    MESSAGE,  (payload,tap_config_response,payload.tap_config_response),  40) \
 X(a, STATIC,   ONEOF,    MESSAGE,  (payload,ble_stream_tick,payload.ble_stream_tick),  41) \
 X(a, STATIC,   ONEOF,    MESSAGE,  (payload,client_id_map_reset_request,payload.client_id_map_reset_request),  42) \
-X(a, STATIC,   ONEOF,    MESSAGE,  (payload,client_id_map_reset_response,payload.client_id_map_reset_response),  43)
+X(a, STATIC,   ONEOF,    MESSAGE,  (payload,client_id_map_reset_response,payload.client_id_map_reset_response),  43) \
+X(a, STATIC,   ONEOF,    MESSAGE,  (payload,input_send_mode_request,payload.input_send_mode_request),  44) \
+X(a, STATIC,   ONEOF,    MESSAGE,  (payload,input_send_mode_response,payload.input_send_mode_response),  45)
 #define alox_UartMessage_CALLBACK NULL
 #define alox_UartMessage_DEFAULT NULL
 #define alox_UartMessage_payload_ack_payload_MSGTYPE alox_Ack
@@ -928,6 +985,8 @@ X(a, STATIC,   ONEOF,    MESSAGE,  (payload,client_id_map_reset_response,payload
 #define alox_UartMessage_payload_ble_stream_tick_MSGTYPE alox_BleStreamTick
 #define alox_UartMessage_payload_client_id_map_reset_request_MSGTYPE alox_ClientIdMapResetRequest
 #define alox_UartMessage_payload_client_id_map_reset_response_MSGTYPE alox_ClientIdMapResetResponse
+#define alox_UartMessage_payload_input_send_mode_request_MSGTYPE alox_InputSendModeRequest
+#define alox_UartMessage_payload_input_send_mode_response_MSGTYPE alox_InputSendModeResponse

 #define alox_Ack_FIELDLIST(X, a) \

@@ -1014,6 +1073,22 @@ X(a, STATIC,   SINGULAR, UINT32,   slaves_updated,    4)
 #define alox_AccelStreamResponse_CALLBACK NULL
 #define alox_AccelStreamResponse_DEFAULT NULL

+#define alox_InputSendModeRequest_FIELDLIST(X, a) \
+X(a, STATIC,   SINGULAR, BOOL,     write,             1) \
+X(a, STATIC,   SINGULAR, UENUM,    mode,              2) \
+X(a, STATIC,   SINGULAR, UINT32,   client_id,         3) \
+X(a, STATIC,   SINGULAR, BOOL,     all_clients,       4)
+#define alox_InputSendModeRequest_CALLBACK NULL
+#define alox_InputSendModeRequest_DEFAULT NULL
+
+#define alox_InputSendModeResponse_FIELDLIST(X, a) \
+X(a, STATIC,   SINGULAR, BOOL,     success,           1) \
+X(a, STATIC,   SINGULAR, UENUM,    mode,              2) \
+X(a, STATIC,   SINGULAR, UINT32,   client_id,         3) \
+X(a, STATIC,   SINGULAR, UINT32,   slaves_updated,    4)
+#define alox_InputSendModeResponse_CALLBACK NULL
+#define alox_InputSendModeResponse_DEFAULT NULL
+
 #define alox_BatteryStatusRequest_FIELDLIST(X, a) \
 X(a, STATIC,   SINGULAR, UINT32,   client_id,         1) \
 X(a, STATIC,   SINGULAR, BOOL,     all_clients,       2)
@@ -1312,6 +1387,8 @@ extern const pb_msgdesc_t alox_AccelDeadzoneRequest_msg;
 extern const pb_msgdesc_t alox_AccelDeadzoneResponse_msg;
 extern const pb_msgdesc_t alox_AccelStreamRequest_msg;
 extern const pb_msgdesc_t alox_AccelStreamResponse_msg;
+extern const pb_msgdesc_t alox_InputSendModeRequest_msg;
+extern const pb_msgdesc_t alox_InputSendModeResponse_msg;
 extern const pb_msgdesc_t alox_BatteryStatusRequest_msg;
 extern const pb_msgdesc_t alox_LipoReading_msg;
 extern const pb_msgdesc_t alox_BatterySample_msg;
@@ -1363,6 +1440,8 @@ extern const pb_msgdesc_t alox_OtaSlaveProgressResponse_msg;
 #define alox_AccelDeadzoneResponse_fields &alox_AccelDeadzoneResponse_msg
 #define alox_AccelStreamRequest_fields &alox_AccelStreamRequest_msg
 #define alox_AccelStreamResponse_fields &alox_AccelStreamResponse_msg
+#define alox_InputSendModeRequest_fields &alox_InputSendModeRequest_msg
+#define alox_InputSendModeResponse_fields &alox_InputSendModeResponse_msg
 #define alox_BatteryStatusRequest_fields &alox_BatteryStatusRequest_msg
 #define alox_LipoReading_fields &alox_LipoReading_msg
 #define alox_BatterySample_fields &alox_BatterySample_msg
@@ -1433,6 +1512,8 @@ extern const pb_msgdesc_t alox_OtaSlaveProgressResponse_msg;
 #define alox_EspNowFindMeResponse_size           8
 #define alox_EspNowUnicastTestRequest_size       12
 #define alox_EspNowUnicastTestResponse_size      8
+#define alox_InputSendModeRequest_size           12
+#define alox_InputSendModeResponse_size          16
 #define alox_LedRingProgressRequest_size         64
 #define alox_LedRingProgressResponse_size        32
 #define alox_LipoReading_size                    8
@@ -42,6 +42,11 @@ enum MessageType {
   * online slaves), or on a slave clear local master/id binding only.
   */
  CLIENT_ID_MAP_RESET = 34;
+  /**
+   * Host → master: get/set slave ESP-NOW send path for accel/tap
+   * (best_effort / fast / wait / reliable).
+   */
+  INPUT_SEND_MODE = 35;
 }

 message UartMessage {
@@ -85,6 +90,8 @@ message UartMessage {
    BleStreamTick ble_stream_tick = 41;
    ClientIdMapResetRequest client_id_map_reset_request = 42;
    ClientIdMapResetResponse client_id_map_reset_response = 43;
+    InputSendModeRequest input_send_mode_request = 44;
+    InputSendModeResponse input_send_mode_response = 45;
  }
 }

@@ -167,6 +174,34 @@ message AccelStreamResponse {
  uint32 slaves_updated = 4;
 }

+/**
+ * Slave ESP-NOW TX path for ACCEL_SAMPLE / TAP_EVENT (debug A/B).
+ * Maps 1:1 to esp_now_core_send_*.
+ */
+enum InputSendMode {
+  INPUT_SEND_BEST_EFFORT = 0;
+  INPUT_SEND_FAST = 1;
+  INPUT_SEND_WAIT = 2;
+  INPUT_SEND_RELIABLE = 3;
+}
+
+// Host → master: get/set input send mode on slaves.
+// write=false: return last mode remembered on master (client_id ignored).
+// write=true: push mode via ESP-NOW (all_clients or one client_id).
+message InputSendModeRequest {
+  bool write = 1;
+  InputSendMode mode = 2;
+  uint32 client_id = 3;
+  bool all_clients = 4;
+}
+
+message InputSendModeResponse {
+  bool success = 1;
+  InputSendMode mode = 2;
+  uint32 client_id = 3;
+  uint32 slaves_updated = 4;
+}
+
 /** Host → master: read LiPo ADC voltages (master local and/or slaves via ESP-NOW). */
 message BatteryStatusRequest {
  /** 0 = master only; >0 = one slave; ignored when all_clients */