Внятное логирование. Смотрим на наличие опросов через modbus, если их нет - считаем, что надо ребутнуться

thermo_sensor_v2.ino

@@ -6,6 +6,8 @@
 // After how much time without connection we will 
 // reboot (in millis)
 #define NON_CONNECTED_REBOOT_TIMEOUT 60000 
+// Will log current state with this interval
+#define LOG_INTERVAL 1000
 
 #define DHTPIN D5
 #define DHTTYPE DHT22
@@ -27,6 +29,14 @@ int cur_t = 0;
 int cur_hum = 0;
 
 
+unsigned long last_poll = 0;
+
+Modbus::ResultCode OnModbusRequest(Modbus::FunctionCode fc, const Modbus::RequestData data) 
+{
+  last_poll = millis();
+  return Modbus::EX_SUCCESS;
+}
+
 void setup() 
 {
 	Serial.begin(115200);
@@ -56,6 +66,7 @@ void setup()
 	Serial.printf("Connected, mac address: %s\n", id);
 
 	// Modbus init	
+  mb.onRequest(OnModbusRequest);
 	mb.server(15000);
 	mb.addHreg(REGISTER_CURRENT_TEMP, cur_t);
 	mb.addHreg(REGISTER_CURRENT_HUM, cur_hum);
@@ -71,6 +82,7 @@ void UpdateDHTData()
 
 unsigned long last_read = 0;
 unsigned long last_connected = 0;
+unsigned long last_log = 0;
 
 void loop() 
 {
@@ -79,11 +91,6 @@ void loop()
 	{
     UpdateDHTData();
     last_read = current;
-    Serial.print("cur_t = ");
-    Serial.print(cur_t);
-    Serial.print(" cur_h = ");
-    Serial.print(cur_hum);
-    Serial.println();
 	}
 	mb.task();
 	mb.Hreg(REGISTER_CURRENT_TEMP, cur_t);
@@ -98,6 +105,23 @@ void loop()
 	}
 	if (current < last_connected || current - last_connected > NON_CONNECTED_REBOOT_TIMEOUT)
 	{
+    Serial.println("Detected wifi disconnection, will reboot");
 		ESP.restart();
 	}
+  if (current < last_poll || current - last_poll > NON_CONNECTED_REBOOT_TIMEOUT)
+	{
+    Serial.println("Detected absense of polls, consider it as connection failure");
+		ESP.restart();
+	}
+  if (current < last_log || current - last_log > LOG_INTERVAL)
+  {
+    last_log = current;
+    Serial.print("t: ");
+    Serial.print(cur_t);
+    Serial.print(" h: ");
+    Serial.print(cur_hum);
+    Serial.print(" WiFi: ");
+    Serial.print(WiFi.status());
+    Serial.println();
+  }
 }