added time sync code to lilygo host

host/esp-t-sim7000g/.vscode/extensions.json

+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

host/esp-t-sim7000g/.vscode/launch.json

+// AUTOMATICALLY GENERATED FILE. PLEASE DO NOT MODIFY IT MANUALLY
+//
+// PIO Unified Debugger
+//
+// Documentation: https://docs.platformio.org/page/plus/debugging.html
+// Configuration: https://docs.platformio.org/page/projectconf/section_env_debug.html
+
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "platformio-debug",
+            "request": "launch",
+            "name": "PIO Debug",
+            "executable": "/home/moritz/Documents/TEAM/sensor-system/host/esp-t-sim7000g/.pio/build/esp-wrover-kit/firmware.elf",
+            "projectEnvName": "esp-wrover-kit",
+            "toolchainBinDir": "/home/moritz/.platformio/packages/toolchain-xtensa-esp32/bin",
+            "internalConsoleOptions": "openOnSessionStart",
+            "preLaunchTask": {
+                "type": "PlatformIO",
+                "task": "Pre-Debug"
+            }
+        },
+        {
+            "type": "platformio-debug",
+            "request": "launch",
+            "name": "PIO Debug (skip Pre-Debug)",
+            "executable": "/home/moritz/Documents/TEAM/sensor-system/host/esp-t-sim7000g/.pio/build/esp-wrover-kit/firmware.elf",
+            "projectEnvName": "esp-wrover-kit",
+            "toolchainBinDir": "/home/moritz/.platformio/packages/toolchain-xtensa-esp32/bin",
+            "internalConsoleOptions": "openOnSessionStart"
+        },
+        {
+            "type": "platformio-debug",
+            "request": "launch",
+            "name": "PIO Debug (without uploading)",
+            "executable": "/home/moritz/Documents/TEAM/sensor-system/host/esp-t-sim7000g/.pio/build/esp-wrover-kit/firmware.elf",
+            "projectEnvName": "esp-wrover-kit",
+            "toolchainBinDir": "/home/moritz/.platformio/packages/toolchain-xtensa-esp32/bin",
+            "internalConsoleOptions": "openOnSessionStart",
+            "loadMode": "manual"
+        }
+    ]
+}

host/esp-t-sim7000g/.vscode/settings.json

+{
+    "cmake.configureOnOpen": false
+}
\ No newline at end of file

host/esp-t-sim7000g/platformio.ini

@@ -13,8 +13,8 @@ platform = espressif32
 board = esp-wrover-kit
 framework = arduino
 monitor_speed = 115200
-monitor_port = /dev/ttyACM0
-upload_port = /dev/ttyACM0
+; monitor_port = /dev/ttyACM0
+; upload_port = /dev/ttyACM0
 build_flags =
     -I include
     -DCORE_DEBUG_LEVEL=5

host/esp-t-sim7000g/src/main.cpp

@@ -61,6 +61,18 @@ TinyGsm modem(SerialAT);
 #define SD_CS 13
 #define LED_PIN 12
 
+enum MessageType{
+    dataAck,
+    hostChange
+};
+typedef struct response{
+	MessageType type;
+	uint8_t mac[6];
+	long time;
+}response;
+
+uint8_t BROADCAST_MAC[6] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};
+
 ESP32Time rtc;
 
 SemaphoreHandle_t xMutex;
@@ -123,6 +135,18 @@ void on_data_recv(const uint8_t *mac, const uint8_t *incomingData, int len)
 	memcpy(data, incomingData, len);
 	esp_log_write(ESP_LOG_DEBUG, TAG_ESPNOW.c_str(), "Raw received Data: %s\n", data);
 
+	if(!esp_now_is_peer_exist(mac)){
+		esp_now_peer_info_t client = {};
+		memcpy(client.peer_addr, mac, 6);
+		client.encrypt = false;
+		client.channel = 0;
+
+		esp_err_t status = esp_now_add_peer(&client);
+		if(status != ESP_OK){
+			esp_log_write(ESP_LOG_DEBUG, TAG_ESPNOW.c_str(), "Failed to add new Peer: %d", status);
+		}
+	}
+
 	DynamicJsonDocument doc = parseReceivedJsonData(data);
 
 	String macAddress = getMacAddressAsString(mac);
@@ -144,6 +168,14 @@ void on_data_recv(const uint8_t *mac, const uint8_t *incomingData, int len)
 	xSemaphoreTake(xMutex, portMAX_DELAY);
 	queue.push(lineData);
 	xSemaphoreGive(xMutex);
+
+	response response;
+	response.type = dataAck;
+	esp_read_mac(response.mac, ESP_MAC_WIFI_STA);
+	response.time = rtc.getEpoch();
+	esp_err_t success = esp_now_send(mac, (uint8_t*) &response, sizeof(response));
+	esp_log_write(ESP_LOG_DEBUG, TAG_ESPNOW.c_str(), 
+		(success == ESP_OK) ? "Response sent." : "Failed to respond");
 }
 
 String documentToLineProtocolString(const DynamicJsonDocument &doc)
@@ -283,6 +315,12 @@ void setup()
 	}
 
 	syncUTCTimeToRTC();
+
+	response announce = {};
+	announce.type = hostChange;
+	esp_read_mac(announce.mac, ESP_MAC_WIFI_STA);
+	announce.time = rtc.getEpoch();
+	esp_now_send(BROADCAST_MAC, (uint8_t *) &announce, sizeof(announce));
 }
 void syncUTCTimeToRTC()
 {

host/esp32-espnow-recv/.vscode/extensions.json

+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

host/esp32-espnow-recv/.vscode/launch.json

+// AUTOMATICALLY GENERATED FILE. PLEASE DO NOT MODIFY IT MANUALLY
+//
+// PIO Unified Debugger
+//
+// Documentation: https://docs.platformio.org/page/plus/debugging.html
+// Configuration: https://docs.platformio.org/page/projectconf/section_env_debug.html
+
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "platformio-debug",
+            "request": "launch",
+            "name": "PIO Debug",
+            "executable": "/home/moritz/Documents/TEAM/sensor-system/host/esp32-espnow-recv/.pio/build/esp32-c3-devkitm-1/firmware.elf",
+            "projectEnvName": "esp32-c3-devkitm-1",
+            "toolchainBinDir": "/home/moritz/.platformio/packages/toolchain-riscv32-esp/bin",
+            "internalConsoleOptions": "openOnSessionStart",
+            "preLaunchTask": {
+                "type": "PlatformIO",
+                "task": "Pre-Debug"
+            }
+        },
+        {
+            "type": "platformio-debug",
+            "request": "launch",
+            "name": "PIO Debug (skip Pre-Debug)",
+            "executable": "/home/moritz/Documents/TEAM/sensor-system/host/esp32-espnow-recv/.pio/build/esp32-c3-devkitm-1/firmware.elf",
+            "projectEnvName": "esp32-c3-devkitm-1",
+            "toolchainBinDir": "/home/moritz/.platformio/packages/toolchain-riscv32-esp/bin",
+            "internalConsoleOptions": "openOnSessionStart"
+        },
+        {
+            "type": "platformio-debug",
+            "request": "launch",
+            "name": "PIO Debug (without uploading)",
+            "executable": "/home/moritz/Documents/TEAM/sensor-system/host/esp32-espnow-recv/.pio/build/esp32-c3-devkitm-1/firmware.elf",
+            "projectEnvName": "esp32-c3-devkitm-1",
+            "toolchainBinDir": "/home/moritz/.platformio/packages/toolchain-riscv32-esp/bin",
+            "internalConsoleOptions": "openOnSessionStart",
+            "loadMode": "manual"
+        }
+    ]
+}

host/esp32-espnow-recv/.vscode/settings.json

+{
+    "cmake.configureOnOpen": false
+}
\ No newline at end of file

[Moritz Perschke]

Still needs to be tested, I was not able to connect the lilygo device to my machine.