Updated Message Handling to new MessageBroker

Makefile

@@ -13,6 +13,15 @@ get_code_gen:
 gen_prot:
 	./alox.protogen -i prot.json -o main/uart
 
+switch_to_s3:
+	idf.py set-target esp32s3
+	cp sdkconfig.s3 sdkconfig
+	idf.py build
+
+switch_to_c3:
+	idf.py set-target esp32c3
+	cp sdkconfig.c3 sdkconfig
+	idf.py build
 
 buildIdf:
 	idf.py build 
@@ -26,6 +35,17 @@ flashMini2:
 flashMini3:
 	idf.py flash -p /dev/ttyACM2
 
+flashCluster:
+	idf.py flash -p /dev/ttyACM1
+	idf.py flash -p /dev/ttyACM2
+	idf.py flash -p /dev/ttyACM3
+	idf.py flash -p /dev/ttyACM4
+	idf.py flash -p /dev/ttyACM5
+	idf.py flash -p /dev/ttyACM6
+	idf.py flash -p /dev/ttyACM7
+	idf.py flash -p /dev/ttyACM8
+
+
 monitorMini:
 	idf.py monitor -p /dev/ttyACM0 
 

goTool/main.go

@@ -69,7 +69,6 @@ type OTASyncManager struct {
 func (ot *OTASyncManager) WaitForNextMessageTimeout() (*MessageReceive, error) {
 	select {
 	case msg := <-ot.NewOTAMessage:
-		log.Printf("OTASyncManager MessageReceive %v", msg)
 		return &msg, nil
 	case <-time.After(ot.TimeoutMessage):
 		return nil, fmt.Errorf("Message Timeout")
@@ -97,7 +96,7 @@ func addByteToParsedBuffer(mr *MessageReceive, pbyte byte) {
 }
 
 func parse_uart_ota_payload_payload(payloadBuffer []byte, payload_len int) {
-	fmt.Printf("RAW BUFFER: % 02X", payloadBuffer[:payload_len])
+	//fmt.Printf("RAW BUFFER: % 02X", payloadBuffer[:payload_len])
 	if payload_len != 4 {
 		fmt.Printf("Payload should be 4 is %v", payload_len)
 		return
@@ -106,6 +105,30 @@ func parse_uart_ota_payload_payload(payloadBuffer []byte, payload_len int) {
 	fmt.Printf("Sequence %v, WriteIndex %v", binary.LittleEndian.Uint16(payloadBuffer[0:1]), binary.LittleEndian.Uint16(payloadBuffer[2:3]))
 }
 
+func parse_uart_version_payload(payloadBuffer []byte, payload_len int) {
+	type payload_data struct {
+		Version   uint16
+		BuildHash [7]uint8
+	}
+
+	tableHeaders := pterm.TableData{
+		{"Version", "Buildhash"},
+	}
+
+	tableData := tableHeaders
+
+	tableData = append(tableData, []string{
+		fmt.Sprintf("%d", binary.LittleEndian.Uint16(payloadBuffer[1:3])),
+		fmt.Sprintf("%s", payloadBuffer[3:10]),
+	})
+
+	err := pterm.DefaultTable.WithHasHeader().WithBoxed().WithData(tableData).Render()
+	if err != nil {
+		fmt.Printf("Fehler beim Rendern der Tabelle: %s\n", err)
+	}
+
+}
+
 func parse_uart_client_info_payload(payloadBuffer []byte, payload_len int) {
 
 	type payload_data struct {
@@ -181,6 +204,7 @@ func message_receive_callback(mr MessageReceive) {
 	case byte(UART_ECHO):
 		break
 	case UART_VERSION:
+		parse_uart_version_payload(mr.parsed_message, mr.write_index)
 		break
 	case UART_CLIENT_INFO:
 		parse_uart_client_info_payload(mr.parsed_message, mr.write_index)
@@ -206,7 +230,6 @@ func message_receive_failed_callback(mr MessageReceive) {
 }
 
 func parseByte(mr *MessageReceive, pbyte byte) {
-	fmt.Printf("Parsing %v", pbyte)
 	addByteToRawBuffer(mr, pbyte)
 	switch mr.state {
 	case WAITING_FOR_START_BYTE:
@@ -279,6 +302,10 @@ func buildMessage(payloadBuffer []byte, payload_len int, sendBuffer []byte) int
 		writeIndex++
 		checksum ^= b
 	}
+	if checksum == START_BYTE || checksum == ESCAPE_BYTE || checksum == END_BYTE {
+		sendBuffer[writeIndex] = ESCAPE_BYTE
+		writeIndex++
+	}
 	sendBuffer[writeIndex] = checksum
 	writeIndex++
 	sendBuffer[writeIndex] = END_BYTE
@@ -310,11 +337,12 @@ func main() {
 		OTA_MessageCounter:         0,
 		OTA_PayloadMessageSequence: 0,
 		NewOTAMessage:              make(chan MessageReceive),
-		TimeoutMessage:             time.Millisecond * 1000,
+		TimeoutMessage:             time.Millisecond * 30000,
 	}
 
 	mode := &serial.Mode{
-		BaudRate: 115200,
+		//BaudRate: 115200,
+		BaudRate: 921600,
 	}
 	port, err := serial.Open("/dev/ttyUSB0", mode)
 	if err != nil {
@@ -367,15 +395,45 @@ func main() {
 		payload_buffer[0] = UART_OTA_START
 		n := buildMessage(payload_buffer, 1, send_buffer)
 		sendMessage(port, send_buffer[:n])
-		_, err = OTA_UpdateHandler.WaitForNextMessageTimeout()
+		msg, err := OTA_UpdateHandler.WaitForNextMessageTimeout()
 		if err != nil {
 			log.Printf("Error Message not acked %v", err)
 		} else {
-			log.Printf("Message Waiting hat funktionioert")
+			if msg.parsed_message[2] != 0x00 {
+				log.Printf("Update Start failed %v", msg.parsed_message[2])
+				return
+			} else {
+				log.Printf("Update Start confirmed Updating Partition %v", msg.parsed_message[1])
+			}
 		}
 
+		update_write_index := 0
 		// write update parts
+		for update_write_index < len(update) {
+			payload_buffer = make([]byte, 1024)
+			send_buffer = make([]byte, 1024)
+			payload_buffer[0] = UART_OTA_PAYLOAD
 
+			write_len := min(200, len(update)-update_write_index)
+
+			//end_payload_len := min(update_write_index+200, len(update))
+
+			copy(payload_buffer[1:write_len+1], update[update_write_index:update_write_index+write_len])
+			n = buildMessage(payload_buffer, write_len+1, send_buffer)
+			sendMessage(port, send_buffer[:n])
+			msg, err := OTA_UpdateHandler.WaitForNextMessageTimeout()
+			if err != nil {
+				log.Printf("Error Message not acked %v", err)
+				return
+			} else {
+				seqCounter := binary.LittleEndian.Uint16(msg.parsed_message[1:3])
+				buff_write_index := binary.LittleEndian.Uint16(msg.parsed_message[3:5])
+				log.Printf("Sequenzce Counter: %d, Update buffer Write Index: %d", seqCounter, buff_write_index)
+			}
+			update_write_index += 200
+		}
+
+		log.Printf("Update übertragen beende hier!!!")
 		// end
 		payload_buffer = make([]byte, 1024)
 		send_buffer = make([]byte, 1024)
@@ -386,6 +444,7 @@ func main() {
 		_, err = OTA_UpdateHandler.WaitForNextMessageTimeout()
 		if err != nil {
 			log.Printf("Error Message not acked %v", err)
+			return
 		} else {
 			log.Printf("Message Waiting hat funktionioert")
 		}

main/communication_handler.c

@@ -1,3 +1,4 @@
+#include "esp_err.h"
 #include "esp_log.h"
 #include "esp_now.h"
 #include "esp_timer.h"
@@ -8,9 +9,97 @@
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
 
 static const char *TAG = "ALOX - COM";
 
+static struct ESP_MessageBroker mr;
+static QueueHandle_t ESP_recieved_message_queue;
+
+void free_ESPNOW_MessageInfo(ESPNOW_MessageInfo *msg) {
+  if (msg->esp_now_info.src_addr) {
+    free(msg->esp_now_info.src_addr);
+    msg->esp_now_info.src_addr = NULL;
+  }
+  if (msg->esp_now_info.des_addr) {
+    free(msg->esp_now_info.des_addr);
+    msg->esp_now_info.des_addr = NULL;
+  }
+  if (msg->esp_now_info.rx_ctrl) {
+    free(msg->esp_now_info.rx_ctrl);
+    msg->esp_now_info.rx_ctrl = NULL;
+  }
+  if (msg->data) {
+    free(msg->data);
+    msg->data = NULL;
+  }
+}
+
+void ESP_InitMessageBroker(QueueHandle_t msg_queue_handle) {
+  mr.num_direct_callbacks = 0;
+  mr.num_task_callbacks = 0;
+  ESP_recieved_message_queue = msg_queue_handle;
+  return;
+}
+
+void ESP_RegisterFunction(CommandPages command,
+                          ESP_RegisterFunctionCallback callback) {
+  mr.FunctionList[mr.num_direct_callbacks].MSGID = command;
+  mr.FunctionList[mr.num_direct_callbacks].callback = callback;
+  mr.num_direct_callbacks++;
+  return;
+}
+
+void ESP_RegisterTask(CommandPages command, ESP_RegisterTaskCallback callback) {
+  mr.TaskList[mr.num_task_callbacks].MSGID = command;
+  mr.TaskList[mr.num_task_callbacks].task = callback;
+  mr.num_task_callbacks++;
+}
+
+void ESP_MessageBrokerTask(void *param) {
+  ESPNOW_MessageInfo received_msg;
+  ESP_MessageBrokerTaskParams_t *task_params =
+      (ESP_MessageBrokerTaskParams_t *)param;
+
+  // Extrahiere die einzelnen Parameter
+  QueueHandle_t msg_queue = task_params->message_queue;
+
+  if (msg_queue == NULL) {
+    ESP_LOGE(TAG, "Message queue not initialized. Terminating task.");
+    vTaskDelete(NULL);
+  }
+
+  ESP_LOGI(TAG, "Message broker task started.");
+
+  while (1) {
+    if (xQueueReceive(msg_queue, &received_msg, portMAX_DELAY)) {
+
+      ESP_LOGI(TAG, "Broker got message trying to relay it now");
+      const BaseMessage *message = (const BaseMessage *)received_msg.data;
+      ESP_LOGI(TAG, "Broker searching for command page %d",
+               message->commandPage);
+      for (int i = 0; i < mr.num_direct_callbacks;
+           i++) { // TODO: there should not be a loop needed here
+        if (mr.FunctionList[i].MSGID == message->commandPage) {
+          mr.FunctionList[i].callback(&received_msg.esp_now_info,
+                                      received_msg.data, received_msg.data_len);
+          ESP_LOGI(TAG, "Broker found matching msgid %d",
+                   mr.FunctionList[i].MSGID);
+          free_ESPNOW_MessageInfo(&received_msg);
+        }
+      }
+      for (int i = 0; i < mr.num_direct_callbacks; i++) {
+        // if (mr.FunctionList[i].MSGID == received_msg.msgid) {
+        //  TODO: Not yet implemented
+        //  Only send data to task, task should be created beforhead and wait
+        //  for new data in the queue.
+        //}
+      }
+    }
+  }
+}
+
 QueueHandle_t messageQueue = NULL; // Warteschlange für empfangene Nachrichten
 static bool hasMaster = false;
 static ClientList *esp_client_list;
@@ -20,7 +109,7 @@ static uint8_t channelNumber = 0;
 
 int init_com(ClientList *clients, uint8_t wifi_channel) {
   // Initialisiere die Kommunikations-Warteschlange
-  messageQueue = xQueueCreate(MESSAGE_QUEUE_SIZE, sizeof(BaseMessage));
+  messageQueue = xQueueCreate(MESSAGE_QUEUE_SIZE, sizeof(ESPNOW_MessageInfo));
   if (messageQueue == NULL) {
     ESP_LOGE(TAG, "Message queue creation failed");
     return -1;
@@ -36,7 +125,7 @@ int add_peer(uint8_t *macAddr) {
   esp_now_peer_info_t peerInfo = {
       .channel = channelNumber,
       .ifidx = ESP_IF_WIFI_STA,
-      .encrypt = false, // Keine Verschlüsselung (kann geändert werden)
+      .encrypt = false, // Keine Verschlüsselung // TODO: should be changed
   };
   memcpy(peerInfo.peer_addr, macAddr, ESP_NOW_ETH_ALEN);
 
@@ -72,13 +161,11 @@ BaseMessage MessageBuilder(CommandPages commandPage, PayloadUnion payload,
                            size_t payload_size) {
   BaseMessage message;
 
-  // Initialisierung der BaseMessage
   message.commandPage = commandPage;
   message.version = 1;
   message.length = (uint16_t)payload_size;
 
-  // Kopieren des Payloads in die Union
-  memset(&message.payload, 0, sizeof(message.payload)); // Sicherheitsmaßnahme
+  memset(&message.payload, 0, sizeof(message.payload));
   memcpy(&message.payload, &payload, payload_size);
 
   return message;
@@ -93,7 +180,8 @@ void master_broadcast_task(void *param) {
 
     ESP_ERROR_CHECK(esp_now_send(broadcast_address, (uint8_t *)&message,
                                  sizeof(BaseMessage)));
-    ESP_LOGI(TAG, "Broadcast Message sent");
+
+    // ESP_LOGI(TAG, "Broadcast Message sent");
     vTaskDelay(pdMS_TO_TICKS(5000));
   }
 }
@@ -106,7 +194,7 @@ void master_broadcast_ping(void *param) {
         MessageBuilder(PingPage, *(PayloadUnion *)&payload, sizeof(payload));
     ESP_ERROR_CHECK(esp_now_send(broadcast_address, (uint8_t *)&message,
                                  sizeof(BaseMessage)));
-    ESP_LOGI(TAG, "Broadcast PING Message sent");
+    // ESP_LOGI(TAG, "Broadcast PING Message sent");
     vTaskDelay(pdMS_TO_TICKS(2500));
   }
 }
@@ -130,46 +218,25 @@ void master_ping_task(void *param) {
   }
 }
 
-void master_receive_callback(const esp_now_recv_info_t *esp_now_info,
+void master_StatusCallback(const esp_now_recv_info_t *esp_now_info,
                            const uint8_t *data, int data_len) {
-  ESP_LOGI(TAG, "MASTER GOT MESSAGE");
+  const BaseMessage *message = (const BaseMessage *)data;
 
+  ESP_LOGI(TAG, "SRC " MACSTR, MAC2STR(esp_now_info->src_addr));
+  ESP_LOGI(TAG,
+           "Status Message Received: status: %d, runningPartition: %d, uptime: "
+           "%d, version: %d",
+           message->payload.status_payload.status,
+           message->payload.status_payload.runningPartition,
+           message->payload.status_payload.uptime,
+           message->payload.status_payload.version);
+}
+
+void master_RegisterCallback(const esp_now_recv_info_t *esp_now_info,
+                             const uint8_t *data, int data_len) {
   BaseMessage replyMessage = {};
   const BaseMessage *message = (const BaseMessage *)data;
-  int id;
-  switch (message->commandPage) {
-  case StatusPage:
-    ESP_LOGI(TAG, "GOT STATUS MESSAGE");
-    id = get_client_id(esp_client_list, esp_now_info->src_addr);
-    if (id >= 0) {
-      esp_client_list->Clients[id].clientVersion =
-          message->payload.status_payload.version;
-    }
 
-    break;
-  case PingPage:
-    ESP_LOGI(TAG, "GOT PING MESSAGE");
-    uint32_t currentTime = esp_timer_get_time();
-    uint32_t diff = currentTime - message->payload.ping_payload.timestamp;
-
-    ESP_LOGI(TAG, "Start: %lu, End: %lu, Diff: %lu, Ping: %lu",
-             message->payload.ping_payload.timestamp, currentTime, diff,
-             diff / 1000); // ping in ms
-
-    id = get_client_id(esp_client_list, esp_now_info->src_addr);
-    if (id >= 0) {
-      esp_client_list->Clients[id].lastSuccessfullPing = xTaskGetTickCount();
-      esp_client_list->Clients[id].lastPing = (diff / 1000);
-      ESP_LOGI(TAG, "Updated client %d: " MACSTR " last ping time to %lu", id,
-               MAC2STR(esp_now_info->src_addr),
-               esp_client_list->Clients[id].lastSuccessfullPing);
-    }
-    break;
-  case BroadCastPage:
-    ESP_LOGI(TAG, "MASTER SHOULD NOT GET BROADCAST MESSAGE, is there another "
-                  "master calling?");
-    break;
-  case RegisterPage:
   ESP_LOGI(TAG, "WILL REGISTER DEVICE");
   esp_now_peer_info_t checkPeerInfo;
   esp_err_t checkPeer =
@@ -190,69 +257,76 @@ void master_receive_callback(const esp_now_recv_info_t *esp_now_info,
     ESP_LOGI(TAG, "ESP ERR ESPNOW_ARG");
     break;
   case (ESP_ERR_ESPNOW_NOT_FOUND):
-      ESP_LOGI(TAG, "CLIENT WIRD IN DIE LISTE AUFGENOMMEN");
-      add_peer(esp_now_info->src_addr);
+    ESP_LOGI(TAG, "CLIENT WIRD IN DIE LISTE AUFGENOMMEN " MACSTR,
+             MAC2STR(esp_now_info->src_addr));
+    int peer_err = add_peer(esp_now_info->src_addr);
+    if (peer_err < 0) {
+      ESP_LOGE(TAG, "Could not add ESP TO ClientList %d", peer_err);
+    }
     ESP_LOGI(TAG, "FRAGE CLIENT STATUS AN");
 
     GetStatusPayload payload = {};
     replyMessage = MessageBuilder(GetStatusPage, *(PayloadUnion *)&payload,
                                   sizeof(payload));
-      ESP_ERROR_CHECK(esp_now_send(esp_now_info->src_addr,
-                                   (uint8_t *)&replyMessage,
-                                   sizeof(BaseMessage)));
+    esp_err_t err = esp_now_send(esp_now_info->src_addr,
+                                 (uint8_t *)&replyMessage, sizeof(BaseMessage));
+    if (err != ESP_OK) {
+      ESP_LOGE(TAG, "Could not send Message Error %s", esp_err_to_name(err));
+    }
 
     break;
   default:
     ESP_LOGI(TAG, "Unknown Message %i", checkPeer);
   }
-    break;
-  default:
-    ESP_LOGI(TAG, "Unknown CommandPage %i", message->commandPage);
-    break;
+}
+
+void master_pingCallback(const esp_now_recv_info_t *esp_now_info,
+                         const uint8_t *data, int data_len) {
+  BaseMessage replyMessage = {};
+  const BaseMessage *message = (const BaseMessage *)data;
+
+  ESP_LOGI(TAG, "GOT PING MESSAGE");
+  uint32_t currentTime = esp_timer_get_time();
+  uint32_t diff = currentTime - message->payload.ping_payload.timestamp;
+
+  ESP_LOGI(TAG, "Start: %lu, End: %lu, Diff: %lu, Ping: %lu",
+           message->payload.ping_payload.timestamp, currentTime, diff,
+           diff / 1000); // ping in ms
+
+  int id = get_client_id(esp_client_list, esp_now_info->src_addr);
+  if (id >= 0) {
+    esp_client_list->Clients[id].lastSuccessfullPing = xTaskGetTickCount();
+    esp_client_list->Clients[id].lastPing = (diff / 1000);
+    ESP_LOGI(TAG, "Updated client %d: " MACSTR " last ping time to %lu", id,
+             MAC2STR(esp_now_info->src_addr),
+             esp_client_list->Clients[id].lastSuccessfullPing);
   }
 }
 
-void client_receive_callback(const esp_now_recv_info_t *esp_now_info,
+void master_broadcastCallback(const esp_now_recv_info_t *esp_now_info,
                               const uint8_t *data, int data_len) {
-  ESP_LOGI(TAG, "SLAVE GOT MESSAGE");
-  ESP_LOGI(TAG, "Received message from: " MACSTR,
+  ESP_LOGI(TAG,
+           "Master should not recieve Broadcast is there another master "
+           "Calling got message from " MACSTR,
            MAC2STR(esp_now_info->src_addr));
-  ESP_LOGI(TAG, "Message: %.*s", data_len, data);
+}
 
+void ESPNOW_RegisterMasterCallbacks() {
+  ESP_RegisterFunction(StatusPage, master_StatusCallback);
+  ESP_RegisterFunction(RegisterPage, master_RegisterCallback);
+  ESP_RegisterFunction(PingPage, master_pingCallback);
+  ESP_RegisterFunction(BroadCastPage, master_broadcastCallback);
+}
+
+void slave_broadcastCallback(const esp_now_recv_info_t *esp_now_info,
+                             const uint8_t *data, int data_len) {
   BaseMessage replyMessage = {};
-
   const BaseMessage *message = (const BaseMessage *)data;
-  switch (message->commandPage) {
-  case StatusPage:
-    ESP_LOGI(TAG, "GOT STATUS MESSAGE");
-    break;
-  case GetStatusPage: {
-    StatusPayload payload = {
-        .status = 1,
-        .runningPartition = 1,
-        .uptime = 100,
-        .version = 0x0002,
 
-    };
-    replyMessage =
-        MessageBuilder(StatusPage, *(PayloadUnion *)&payload, sizeof(payload));
-    ESP_ERROR_CHECK(esp_now_send(
-        esp_now_info->src_addr, (uint8_t *)&replyMessage, sizeof(BaseMessage)));
-
-  } break;
-  case PingPage:
-    ESP_LOGI(TAG, "GOT PING MESSAGE");
-    replyMessage = MessageBuilder(PingPage, *(PayloadUnion *)&message->payload,
-                                  sizeof(message->payload));
-    ESP_ERROR_CHECK(esp_now_send(
-        esp_now_info->src_addr, (uint8_t *)&replyMessage, sizeof(BaseMessage)));
-    break;
-  case BroadCastPage:
   ESP_LOGI(TAG, "GOT BROADCAST MESSAGE");
   if (!hasMaster) {
     if (IS_BROADCAST_ADDR(esp_now_info->des_addr)) {
-        ESP_LOGI(TAG,
-                 "GOT BROADCAST MESSAGE ATTEMPTING TO REGISTER TO MASTER!");
+      ESP_LOGI(TAG, "GOT BROADCAST MESSAGE ATTEMPTING TO REGISTER TO MASTER!");
       add_peer(esp_now_info->src_addr);
       replyMessage =
           MessageBuilder(RegisterPage, *(PayloadUnion *)&message->payload,
@@ -262,14 +336,116 @@ void client_receive_callback(const esp_now_recv_info_t *esp_now_info,
                                    sizeof(BaseMessage)));
       hasMaster = true;
     }
+  } else {
+    ESP_LOGI(TAG, "Already have master wont register by the new one");
   }
-    break;
-  case RegisterPage:
-    break;
-  default:
-    ESP_LOGI(TAG, "GOT UNKONW MESSAGE");
-    break;
+}
+void slave_getstatusCallback(const esp_now_recv_info_t *esp_now_info,
+                             const uint8_t *data, int data_len) {
+  BaseMessage replyMessage = {};
+  const BaseMessage *message = (const BaseMessage *)data;
+
+  StatusPayload payload = {
+      .status = 1,
+      .runningPartition = 1,
+      .uptime = 100,
+      .version = 0x0002,
+
+  };
+  replyMessage =
+      MessageBuilder(StatusPage, *(PayloadUnion *)&payload, sizeof(payload));
+  ESP_ERROR_CHECK(esp_now_send(esp_now_info->src_addr, (uint8_t *)&replyMessage,
+                               sizeof(BaseMessage)));
+}
+void slave_pingCallback(const esp_now_recv_info_t *esp_now_info,
+                        const uint8_t *data, int data_len) {
+  if (!hasMaster)
+    return;
+
+  BaseMessage replyMessage = {};
+  const BaseMessage *message = (const BaseMessage *)data;
+
+  ESP_LOGI(TAG, "GOT PING MESSAGE");
+  replyMessage = MessageBuilder(PingPage, *(PayloadUnion *)&message->payload,
+                                sizeof(message->payload));
+  ESP_ERROR_CHECK(esp_now_send(esp_now_info->src_addr, (uint8_t *)&replyMessage,
+                               sizeof(BaseMessage)));
+}
+
+void ESPNOW_RegisterSlaveCallbacks() {
+  ESP_RegisterFunction(BroadCastPage, slave_broadcastCallback);
+  ESP_RegisterFunction(GetStatusPage, slave_getstatusCallback);
+  ESP_RegisterFunction(PingPage, slave_pingCallback);
+}
+
+void master_receive_callback(const esp_now_recv_info_t *esp_now_info,
+                             const uint8_t *data, int data_len) {
+  ESP_LOGI(TAG, "MASTER GOT MESSAGE");
+
+  // Allokiere Speicher für die Daten und kopiere sie
+  uint8_t *copied_data = (uint8_t *)malloc(data_len);
+  if (copied_data == NULL) {
+    ESP_LOGE(TAG, "Failed to allocate memory for message data.");
+    return;
   }
+  memcpy(copied_data, data, data_len);
+
+  // Fülle die neue Struktur mit kopierten Daten
+  ESPNOW_MessageInfo msg_info;
+  msg_info.esp_now_info.src_addr = malloc(6);
+  if (msg_info.esp_now_info.src_addr) {
+    memcpy(msg_info.esp_now_info.src_addr, esp_now_info->src_addr, 6);
+  }
+
+  // Speicher für des_addr kopieren
+  msg_info.esp_now_info.des_addr = malloc(6);
+  if (msg_info.esp_now_info.des_addr) {
+    memcpy(msg_info.esp_now_info.des_addr, esp_now_info->des_addr, 6);
+  }
+
+  // rx_ctrl Struktur kopieren
+  msg_info.esp_now_info.rx_ctrl = malloc(sizeof(wifi_pkt_rx_ctrl_t));
+  if (msg_info.esp_now_info.rx_ctrl) {
+    memcpy(msg_info.esp_now_info.rx_ctrl, esp_now_info->rx_ctrl,
+           sizeof(wifi_pkt_rx_ctrl_t));
+  }
+
+  msg_info.data = copied_data;
+  msg_info.data_len = data_len;
+
+  if (xQueueSend(ESP_recieved_message_queue, &msg_info, portMAX_DELAY) !=
+      pdPASS) {
+    // Fehlerbehandlung: Queue voll oder Senden fehlgeschlagen
+    ESP_LOGE(TAG, "Failed to send parsed message to queue.");
+  }
+  return;
+}
+
+void client_receive_callback(const esp_now_recv_info_t *esp_now_info,
+                             const uint8_t *data, int data_len) {
+  ESP_LOGI(TAG, "SLAVE GOT MESSAGE");
+  ESP_LOGI(TAG, "Received message from: " MACSTR,
+           MAC2STR(esp_now_info->src_addr));
+
+  uint8_t *copied_data = (uint8_t *)malloc(data_len);
+  if (copied_data == NULL) {
+    ESP_LOGE(TAG, "Failed to allocate memory for message data.");
+    return;
+  }
+  memcpy(copied_data, data, data_len);
+
+  // Fülle die neue Struktur mit kopierten Daten
+  ESPNOW_MessageInfo msg_info;
+  memcpy(&msg_info.esp_now_info, esp_now_info, sizeof(esp_now_recv_info_t));
+  msg_info.data = copied_data;
+  msg_info.data_len = data_len;
+
+  if (xQueueSend(ESP_recieved_message_queue, &msg_info, portMAX_DELAY) !=
+      pdPASS) {
+    // Fehlerbehandlung: Queue voll oder Senden fehlgeschlagen
+    ESP_LOGE(TAG, "Failed to send parsed message to queue.");
+  }
+  return;
 }
 
 void client_data_sending_task(void *param) {

main/communication_handler.h

@@ -28,16 +28,35 @@ static uint8_t broadcast_address[ESP_NOW_ETH_ALEN] = {0xFF, 0xFF, 0xFF,
 #define MESSAGE_QUEUE_SIZE 10
 
 typedef enum {
+  OTA_PREP_UPGRADE,
+  OTA_SEND_PAYLOAD,
+  OTA_WRITE_UPDATE_BUFFER,
+  OTA_SEND_MISSING,
+  OTA_UPDATE_INFO,
+  OTA_END_UPGRADE,
   StatusPage,
   GetStatusPage,
   ConfigPage,
   PingPage,
   BroadCastPage,
   RegisterPage,
-  FirmwarePrepPage,
-  FirmwarePayloadPage,
 } CommandPages;
 
+typedef struct __attribute__((packed)) {
+
+} OTA_PREP_UPGRADE_Payload;
+
+typedef struct __attribute__((packed)) {
+} OTA_SEND_PAYLOAD_Payload;
+typedef struct __attribute__((packed)) {
+} OTA_WRITE_UPDATE_BUFFER_Payload;
+typedef struct __attribute__((packed)) {
+} OTA_SEND_MISSING_Payload;
+typedef struct __attribute__((packed)) {
+} OTA_UPDATE_INFO_Payload;
+typedef struct __attribute__((packed)) {
+} OTA_END_UPGRADE_Payload;
+
 typedef struct __attribute__((packed)) {
   uint16_t version; // software version
   uint8_t runningPartition;
@@ -97,6 +116,47 @@ typedef struct __attribute__((packed)) {
 static_assert(sizeof(BaseMessage) <= 255,
               "BaseMessage darf nicht größer als 255 sein");
 
+typedef void (*ESP_RegisterFunctionCallback)(
+    const esp_now_recv_info_t *esp_now_info, const uint8_t *data, int data_len);
+typedef void (*ESP_RegisterTaskCallback)(
+    const esp_now_recv_info_t *esp_now_info, const uint8_t *data, int data_len);
+
+struct ESP_RegisterdFunction {
+  CommandPages MSGID;
+  ESP_RegisterFunctionCallback callback;
+};
+
+struct ESP_RegisterdTask {
+  CommandPages MSGID;
+  ESP_RegisterTaskCallback task;
+};
+
+struct ESP_MessageBroker {
+  struct ESP_RegisterdFunction FunctionList[64];
+  uint8_t num_direct_callbacks;
+  struct ESP_RegisterdTask TaskList[64];
+  uint8_t num_task_callbacks;
+};
+
+typedef struct {
+  QueueHandle_t message_queue;
+} ESP_MessageBrokerTaskParams_t;
+
+typedef struct {
+  esp_now_recv_info_t esp_now_info;
+  uint8_t *data;
+  int data_len;
+} ESPNOW_MessageInfo;
+
+void ESP_InitMessageBroker(QueueHandle_t msg_queue_handle);
+void ESP_RegisterFunction(CommandPages command,
+                          ESP_RegisterFunctionCallback callback);
+void ESP_RegisterTask(CommandPages command, ESP_RegisterTaskCallback callback);
+void ESP_MessageBrokerTask(void *param);
+
+void ESPNOW_RegisterMasterCallbacks();
+void ESPNOW_RegisterSlaveCallbacks();
+
 int init_com(ClientList *clients, uint8_t wifi_channel);
 int getNextFreeClientId();
 int add_peer(uint8_t *macAddr);

main/main.c

@@ -36,6 +36,7 @@ static uint8_t send_message_buffer[1024];
 static uint8_t send_message_payload_buffer[512];
 
 static MessageBrokerTaskParams_t broker_task_params;
+static ESP_MessageBrokerTaskParams_t esp_broker_task_params;
 
 ClientList clientList = {.Clients = {{0}}, .ClientCount = 0};
 
@@ -74,8 +75,6 @@ void versionCallback(uint8_t msgid, const uint8_t *payload, size_t payload_len,
   send_payload_buffer[1] = (uint8_t)((version >> 8) & 0xFF);
   memcpy(&send_payload_buffer[2], &BUILD_GIT_HASH, git_build_hash_len);
 
-  // currently running partition
-
   int len = build_message(UART_VERSION, send_payload_buffer, needed_buffer_size,
                           send_buffer, send_buffer_size);
   if (len < 0) {
@@ -85,7 +84,7 @@ void versionCallback(uint8_t msgid, const uint8_t *payload, size_t payload_len,
              payload_len, send_buffer_size, len);
     return;
   }
-  uart_write_bytes(MASTER_UART, send_buffer, len - 1);
+  uart_write_bytes(MASTER_UART, send_buffer, len);
 }
 
 void clientInfoCallback(uint8_t msgid, const uint8_t *payload,
@@ -143,7 +142,7 @@ void clientInfoCallback(uint8_t msgid, const uint8_t *payload,
   int len = build_message(UART_CLIENT_INFO, send_payload_buffer,
                           needed_buffer_size, send_buffer, send_buffer_size);
 
-  ESP_LOG_BUFFER_HEX("SEND BUFFER: ", send_buffer, send_buffer_size);
+  // ESP_LOG_BUFFER_HEX("SEND BUFFER: ", send_buffer, send_buffer_size);
 
   if (len < 0) {
     ESP_LOGE(TAG,
@@ -259,9 +258,19 @@ void app_main(void) {
   }
   nvs_close(nt);
 
+  QueueHandle_t espnow_message_queue =
+      xQueueCreate(10, sizeof(ESPNOW_MessageInfo));
+  ESP_InitMessageBroker(espnow_message_queue);
+
+  esp_broker_task_params.message_queue = espnow_message_queue;
+  xTaskCreate(ESP_MessageBrokerTask, "espnow_message_broker_task", 4096,
+              (void *)&esp_broker_task_params, 4, NULL);
+
   // Tasks starten basierend auf Master/Client
   if (isMaster) {
     ESP_LOGI(TAG, "Started in Mastermode");
+    ESPNOW_RegisterMasterCallbacks();
+
     add_peer(broadcast_address);
     xTaskCreate(master_broadcast_task, "MasterBroadcast", 4096, NULL, 1, NULL);
     //  xTaskCreate(master_ping_task, "MasterPing", 4096, NULL, 1, NULL);
@@ -297,6 +306,7 @@ void app_main(void) {
     // NULL);
   } else {
     ESP_LOGI(TAG, "Started in Slavemode");
+    ESPNOW_RegisterSlaveCallbacks();
     // xTaskCreate(client_data_sending_task, "ClientDataSending", 4096, NULL, 1,
     //             NULL);
   }

main/message_builder.c

@@ -20,8 +20,8 @@ bool add_byte_with_length_check(uint8_t byte, size_t write_index, uint8_t *data,
 int build_message(uint8_t msgid, const uint8_t *payload, size_t payload_len,
                   uint8_t *msg_buffer, size_t msg_buffer_size) {
 
-  ESP_LOGE("BM", "payload_len %d, msg_buffer_size %d", payload_len + 4,
-           msg_buffer_size);
+  //ESP_LOGE("BM", "payload_len %d, msg_buffer_size %d", payload_len + 4,
+  //         msg_buffer_size);
   if (payload_len + 4 > msg_buffer_size) {
     return PayloadBiggerThenBuffer;
   }
@@ -75,6 +75,5 @@ int build_message(uint8_t msgid, const uint8_t *payload, size_t payload_len,
   msg_buffer[write_index++] = checksum;
   msg_buffer[write_index++] = EndByte;
 
-  ESP_LOGE("BM", "MESSAGE FERTIG GEBAUT");
   return write_index;
 }

main/message_handler.c

@@ -46,8 +46,8 @@ void MessageBrokerTask(void *param) {
 
   while (1) {
     if (xQueueReceive(msg_queue, &received_msg, portMAX_DELAY)) {
-      ESP_LOGI(TAG, "Received message from queue: MSGID=0x%02X, Length=%u",
-               received_msg.msgid, received_msg.payload_len);
+      //ESP_LOGI(TAG, "Received message from queue: MSGID=0x%02X, Length=%u",
+      //         received_msg.msgid, received_msg.payload_len);
 
       for (int i = 0; i < mr.num_direct_callbacks; i++) {
         if (mr.FunctionList[i].MSGID == received_msg.msgid) {

main/ota_update.c

@@ -4,6 +4,7 @@
 #include "esp_log.h"
 #include "esp_ota_ops.h"
 #include "esp_partition.h"
+#include "esp_system.h"
 #include "message_builder.h"
 #include "message_handler.h"
 #include "uart_handler.h"
@@ -17,17 +18,20 @@
 
 static uint8_t update_buffer[UPDATE_BUFFER_SIZE];
 static uint16_t update_buffer_write_index;
+static uint32_t update_size;
 static uint16_t sequenz_counter; // how often the update buffer gets written
 static const char *TAG = "ALOX - OTA";
 static esp_ota_handle_t update_handle;
 
-void prepare_ota_update() {
+int prepare_ota_update() {
   const esp_partition_t *running = esp_ota_get_running_partition();
   ESP_LOGI(TAG, "OTA: Running Partition: %s", running->label);
+  int part = 0;
 
   char partition_to_update[] = "ota_0";
   if (strcmp(running->label, "ota_0") == 0) {
     strcpy(partition_to_update, "ota_1");
+    part = 1;
   }
 
   const esp_partition_t *update_partition = esp_partition_find_first(
@@ -36,7 +40,7 @@ void prepare_ota_update() {
   // Check if the partition was found
   if (update_partition == NULL) {
     ESP_LOGE(TAG, "Failed to find OTA partition: %s", partition_to_update);
-    return; // Or handle the error appropriately
+    return -1; // Or handle the error appropriately
   }
 
   ESP_LOGI(TAG, "Gonna write OTA Update in Partition: %s",
@@ -47,11 +51,11 @@ void prepare_ota_update() {
   if (err != ESP_OK) {
     ESP_LOGE(TAG, "esp_ota_begin failed (%s)", esp_err_to_name(err));
     esp_ota_abort(update_handle);
-    return;
+    return -2;
   }
 
   ESP_LOGI(TAG, "OTA update started successfully.");
-  // Proceed with writing the new firmware to the partition...
+  return part;
 }
 
 void start_uart_update(uint8_t msgid, const uint8_t *payload,
@@ -60,10 +64,23 @@ void start_uart_update(uint8_t msgid, const uint8_t *payload,
                        size_t send_buffer_size) {
   ESP_LOGI(TAG, "OTA Update Start Uart Command");
 
-  prepare_ota_update();
+  vTaskPrioritySet(NULL, 2);
+
+  update_size = 0;
+
+  int part = prepare_ota_update();
+
+  // Message:
+  // byte partition
+  // byte error
+
+  if (part < 0) {
+    send_payload_buffer[1] = (part * -1) & 0xff;
+  } else {
+    send_payload_buffer[0] = part & 0xff;
+  }
 
   int send_payload_len = 2;
-  send_payload_buffer[0] = 0xff;
   int len = build_message(UART_OTA_START, send_payload_buffer, send_payload_len,
                           send_buffer, send_buffer_size);
   if (len < 0) {
@@ -77,35 +94,47 @@ void start_uart_update(uint8_t msgid, const uint8_t *payload,
   uart_write_bytes(MASTER_UART, send_buffer, len);
 }
 
-void payload_uart_update(uint8_t msgid, const uint8_t *payload,
-                         size_t payload_len, uint8_t *send_payload_buffer,
-                         size_t send_payload_buffer_size, uint8_t *send_buffer,
-                         size_t send_buffer_size) {
-  ESP_LOGI(TAG, "OTA Update Payload Uart Command");
-
-  if (update_buffer_write_index < UPDATE_BUFFER_SIZE - UPDATE_PAYLOAD_SIZE) {
-    uint32_t write_len = MIN(UPDATE_PAYLOAD_SIZE, payload_len);
-    ESP_LOGI(TAG, "Writing Data to Update BUffer Sequence %d, writing Data %d",
-             sequenz_counter, write_len);
-    memcpy(&update_buffer[update_buffer_write_index], payload, write_len);
-    update_buffer_write_index += write_len;
-  } else {
-    ESP_LOGI(TAG, "Update Buffer full, writing it to OTA Update");
-
+esp_err_t write_ota_update(uint32_t write_len, const uint8_t *payload) {
+  if (update_buffer_write_index > UPDATE_BUFFER_SIZE - write_len) {
+    // ESP_LOGI(TAG, "Writing Data to Update BUffer Sequence %d, writing Data
+    // %d",
+    //          sequenz_counter, write_len);
     // write to ota
     esp_err_t err =
         esp_ota_write(update_handle, update_buffer, update_buffer_write_index);
     if (err != ESP_OK) {
-      ESP_LOGE(TAG, "GOT ESP ERROR WRITE OTA %d", err);
+      return err;
     }
 
     update_buffer_write_index = 0;
     sequenz_counter++;
+    return err;
+  }
+
+  memcpy(&update_buffer[update_buffer_write_index], payload, write_len);
+  update_buffer_write_index += write_len;
+  return ESP_OK;
+}
+
+void payload_uart_update(uint8_t msgid, const uint8_t *payload,
+                         size_t payload_len, uint8_t *send_payload_buffer,
+                         size_t send_payload_buffer_size, uint8_t *send_buffer,
+                         size_t send_buffer_size) {
+  // ESP_LOGI(TAG, "OTA Update Payload Uart Command");
+
+  uint32_t write_len = MIN(UPDATE_PAYLOAD_SIZE, payload_len);
+  update_size += write_len;
+
+  esp_err_t err = write_ota_update(write_len, payload);
+
+  if (err != ESP_OK) {
+    ESP_LOGE(TAG, "GOT ESP ERROR WRITE OTA %d", err);
   }
 
   size_t send_payload_len = 4;
   memcpy(send_payload_buffer, &sequenz_counter, 2);
   memcpy(&send_payload_buffer[2], &update_buffer_write_index, 2);
+  send_payload_buffer[4] = 0x00; // error
 
   int len = build_message(UART_OTA_PAYLOAD, send_payload_buffer,
                           send_payload_len, send_buffer, send_buffer_size);
@@ -120,17 +149,48 @@ void payload_uart_update(uint8_t msgid, const uint8_t *payload,
   uart_write_bytes(MASTER_UART, send_buffer, len);
 }
 
+esp_err_t end_ota_update() {
+  esp_err_t err =
+      esp_ota_write(update_handle, update_buffer, update_buffer_write_index);
+  if (err != ESP_OK) {
+    ESP_LOGE(TAG, "GOT ESP ERROR WRITE OTA %d", err);
+  }
+
+  err = esp_ota_end(update_handle);
+  if (err != ESP_OK) {
+    ESP_LOGE(TAG, "GOT ESP ERROR WRITE OTA %d", err);
+  }
+
+  ESP_LOGE(TAG, "UPDATE ENDE UPDATGE SIZE SIND %d BYTES", update_size);
+
+  // Hol dir die zuletzt geschriebene Partition
+  const esp_partition_t *partition = esp_ota_get_next_update_partition(NULL);
+  if (partition == NULL) {
+    ESP_LOGE(TAG, "Failed to get updated partition");
+    err = ESP_FAIL;
+  }
+
+  // Setze sie als Boot-Partition
+  ESP_LOGE(TAG, "Setzte nächste Partition auf %s", partition->label);
+  err = esp_ota_set_boot_partition(partition);
+  if (err != ESP_OK) {
+    ESP_LOGE(TAG, "esp_ota_set_boot_partition failed: %s",
+             esp_err_to_name(err));
+  }
+  return err;
+}
+
 void end_uart_update(uint8_t msgid, const uint8_t *payload, size_t payload_len,
                      uint8_t *send_payload_buffer,
                      size_t send_payload_buffer_size, uint8_t *send_buffer,
                      size_t send_buffer_size) {
   ESP_LOGI(TAG, "OTA Update End Uart Command");
-  esp_err_t err = esp_ota_end(update_handle);
-  if (err != ESP_OK) {
-    ESP_LOGE(TAG, "GOT ESP ERROR WRITE OTA %d", err);
-  }
 
-  int send_payload_len = 0;
+  esp_err_t err = end_ota_update();
+
+  // message ret esp_err_t
+  int send_payload_len = 1;
+  send_payload_buffer[0] = err & 0xff;
   int len = build_message(UART_OTA_END, send_payload_buffer, send_payload_len,
                           send_buffer, send_buffer_size);
   if (len < 0) {
@@ -142,6 +202,8 @@ void end_uart_update(uint8_t msgid, const uint8_t *payload, size_t payload_len,
   }
 
   uart_write_bytes(MASTER_UART, send_buffer, len);
+
+  vTaskPrioritySet(NULL, 1);
 }
 
 void write_ota_update_from_uart_task(void *param) {}

main/ota_update.h

@@ -1,9 +1,12 @@
 #ifndef OTA_UPDATE_H
 #define OTA_UPDATE_H
 
+#include "esp_err.h"
+#include <stdint.h>
+#include <sys/types.h>
 #define UPDATE_BUFFER_SIZE 4000
 #define UPDATE_PAYLOAD_SIZE 200
-#define UPDATE_MAX_SEQUENZES (UPDATE_BUFFER_SIZE/UPDATE_PAYLOAD_SIZE)
+#define UPDATE_MAX_SEQUENZES (UPDATE_BUFFER_SIZE / UPDATE_PAYLOAD_SIZE)
 
 void init_ota();
 
@@ -13,8 +16,10 @@ enum OTA_UPDATE_STATES {
   WAITING_FOR_PAYLOAD,
   WRITING_OTA_TO_PARTITION,
 
-	
-	
 };
 
+int prepare_ota_update();
+esp_err_t write_ota_update(uint32_t write_len, const uint8_t *payload);
+esp_err_t end_ota_update();
+
 #endif

main/uart_handler.c

@@ -18,7 +18,7 @@ static const char *TAG = "ALOX - UART";
 static QueueHandle_t parsed_message_queue;
 
 void init_uart(QueueHandle_t msg_queue_handle) {
-  uart_config_t uart_config = {.baud_rate = 115200,
+  uart_config_t uart_config = {.baud_rate = 921600, // 921600, 115200
                                .data_bits = UART_DATA_8_BITS,
                                .parity = UART_PARITY_DISABLE,
                                .stop_bits = UART_STOP_BITS_1,
@@ -61,9 +61,9 @@ void send_message_hook(const uint8_t *buffer, size_t length) {
 
 void HandleMessageReceivedCallback(uint8_t msgid, const uint8_t *payload,
                                    size_t payload_len) {
-  ESP_LOGI(TAG, "GOT UART MESSAGE MSGID: %02X, Len: %u bytes \nMSG: ", msgid,
+  /*ESP_LOGI(TAG, "GOT UART MESSAGE MSGID: %02X, Len: %u bytes \nMSG: ", msgid,
            payload_len, payload);
-  ESP_LOG_BUFFER_HEX(TAG, payload, payload_len);
+  ESP_LOG_BUFFER_HEX(TAG, payload, payload_len);*/
 
   ParsedMessage_t msg_to_send;
   msg_to_send.msgid = msgid;

readme.md

@@ -2,54 +2,123 @@
 
 ## Struktur einer Nachricht
 
-    0xAA = Startbyte  
-    checksum = XOR über alle Bytes (ohne Startbyte und Checksum-Byte)
+- Control Bytes:
+    - 0xAA = Startbyte  
+    - 0xBB = EscapeByte
+    - 0xCC = EndByte
     
-## Nachrichtenaufbau (Message Frame)
+checksum = XOR über alle Bytes (ohne Control Bytes und Checksum-Byte)
 
-[ Startbyte ] [ Length ] [ CommandPage ] [ Payload (variabel) ] [ Checksum ]
+Command, Payload und Checksum werden Escaped sollten sie einem Control Byte ensteprechend
+| Startbyte | Command | Payload (variable) | Checksum | Endbyte |
+|-----------|---------|--------------------|----------|---------|
 
 ### Felder im Detail:
 
-- **Length** (`uint8_t`):  
-  Gibt die Gesamtlänge der Nachricht **ab `CommandPage` bis einschließlich `Payload`** an.  
-
-- **CommandPage** (`uint8_t`):  
-  Gibt an, welcher Nachrichtentyp oder Befehl gesendet wird.
+- **Command** (`uint8_t`):  
+  Gibt an, welcher Nachrichtentyp gesendet wird.
 
 - **Payload** (`variabel`):  
-  Datenfeld mit variabler Länge, abhängig vom `CommandPage`.
+  Datenfeld mit variabler Länge, abhängig vom `Command`.
 
 - **Checksum** (`uint8_t`):  
-  XOR über alle Bytes ab `Length` bis einschließlich `Payload`.  
-
-### Nachrichten von PC zu ESP:
-
-clientid: 0x00 für master, 0xFF für broadcast, ansonsten 0xA0-0xB3 // 19 Clients
-
-### RequestPing 0xE1
-Payload: byte: clientid
-### RequestInfo 0xE2
-Payload: byte: clientid
-### RequestRestart 0xE3
-Payload: byte: clientid
-### PrepareFirmwareUpdate 0xF1
-Payload: none 
-### FirmwareUpdateLine 0xF2
-Payload: firmware line 240Bytes MAX 
-### ExecuteFirmwareUpdate 0xF3
-Payload: none 
-
-### Nachrichten von ESP zu PC:
+  XOR über aller Bytes von `Command` und `Payload`.  
 
 
+### Messages
 
----
+Command: 
+- UART_ECHO        = 0x01
+- UART_VERSION     = 0x02
+- UART_CLIENT_INFO = 0x03
 
-# Roadmap 
-- [ ] SEND STATUS OF DEVICE OVER UART
-- [ ] CONFIGURE PEERS OVER MASTER
-- [ ] SAVE PIN CONFIG ON PEERS
+Grundlegend sind alle Zahlenwerte im LittleEndian format!
+
+#### UART_ECHO:
+
+- Send Message: AA 01 01 CC
+- Message Received: AA 01 01 CC
+
+Sendet zurück was geschickt wird.
+
+#### UART_VERSION:
+
+| Offset | Länge (Bytes) | Bezeichnung | Beschreibung     |
+|--------|---------------|-------------|------------------|
+| 0      | 2             | Version     | Software Version |
+| 2      | 7             | BuildHash   | Git Hash         |
+
+
+- Send Message: AA 02 02 CC
+- Message Received: AA 02 01 00 33 62 35 36 30 37 39 6F CC
+
+| Version | Buildhash |
+|---------|-----------|
+| 1       | 3b56078   |
+
+
+Sendet die Version und den Buildhash vom Master zurück.
+
+#### UART_CLIENT_INFO:
+
+Das erste Datenbyte nach dem Commando gibt an wie viele Client Infos in dieser Nachricht vorhanden sind.
+
+Danach teilt sich ein Eintrag wie Folgt auf:
+| Offset | Länge (Bytes) | Bezeichnung                | Beschreibung                                                  |
+|--------|---------------|----------------------------|---------------------------------------------------------------|
+| 0      | 1             | Client ID                  | Eindeutige ID des Clients.                                    |
+| 1      | 1             | Ist verfügbar              | Boolean-Wert (0 = nein, 1 = ja), ob der Client verfügbar ist. |
+| 2      | 1             | Slot genutzt               | Boolean-Wert (0 = nein, 1 = ja), ob der Slot belegt ist.      |
+| 3      | 6             | MAC-Adresse                | Die Hardware-Adresse des Clients.                             |
+| 9      | 4             | Letzter Ping               | Zeit in Millisekunden seit dem letzten Ping.                  |
+| 13     | 4             | Letzter erfolgreicher Ping | Zeit in Millisekunden seit dem letzten erfolgreichen Ping.    |
+| 17     | 2             | Version                    | Versionsnummer des Clients.                                   |
+
+##### Ein Client
+
+- Send Message: AA 03 03 CC
+- Message Received: AA 03 01 00 01 01 50 78 7D 18 89 F8 34 00 00 00 61 1F 00 00 02 00 76 CC
+
+| Client ID | Verfügbar | Genutzt | MAC-Adresse       | Last Ping | Last Successful Ping | Version |
+|-----------|-----------|---------|-------------------|-----------|----------------------|---------|
+| 0         | 1         | 1       | 50:78:7D:18:89:F8 | 52        | 8033                 | 2       |
+
+##### Zwei Clients
+
+- Send Message: AA 03 03 CC
+- Message Received: AA 03 02 00 01 01 50 78 7D 18 89 F8 22 00 00 00 F4 2A 01 00 02 00 01 01 01 50 78 7D 18 0C B4 10 00 00 00 F1 2A 01 00 02 00 FE CC
+
+| Client ID | Verfügbar | Genutzt | MAC-Adresse       | Last Ping | Last Successful Ping | Version |
+|-----------|-----------|---------|-------------------|-----------|----------------------|---------|
+| 0         | 1         | 1       | 50:78:7D:18:89:F8 | 34        | 76532                | 2       |
+| 1         | 1         | 1       | 50:78:7D:18:C:B4  | 16        | 76529                | 2       |
+
+#### UART_CLIENT_INPUT:
+
+Die Identifizierung wird hier anhand der vorher gesendeten ClientID gemacht also muss einmal vorher `UART_CLIENT_INFO` aufgerufen werden.
+
+Das erste Datenbyte nach dem Commando gibt an wie viele Client Infos in dieser Nachricht vorhanden sind.
+
+Danach teilt sich ein Eintrag wie Folgt auf:
+| Offset | Länge (Bytes) | Bezeichnung | Beschreibung                                                                     |
+|--------|---------------|-------------|----------------------------------------------------------------------------------|
+| 0      | 1             | Client ID   | Eindeutige ID des Clients.                                                       |
+| 1      | 4             | LageX       | Float Wert von der X Lage.                                                       |
+| 5      | 4             | LageY       | Float Wert von der Y Lage.                                                       |
+| 9      | 4             | InputMaske  | Int32 Wert der als Bitmaske genutzt wird um bis zu 32 Boolische Werte anzugeben. |
+
+Inputmaske:
+Taster1, Taster2, IOError1, IOErro2, AkkuStand1, AkkuStand2 (2 Bit kodiert für 25%,50%,75%,100%), rest unbelegt, default 0
+
+| Bit1 | Bit2 | Akkustand |
+|------|------|-----------|
+| 0    | 0    | 25%       |
+| 0    | 1    | 50%       |
+| 1    | 0    | 75%       |
+| 1    | 1    | 100%      |
+
+
+<div style="page-break-after: always;"></div>
 
 # Machbarkeits-Studie