MQTT ethernet gateway Works great for 3+ hours then stops

[pit007]

Have you try to init the ENC all ~2 hours or by detecting the connection lost ? (brute force style, but better as powerdown all with a relais)

[GuyP]

Well it's very simple to detect if the network has gone away.

In the processEthernetMessage() function, it checks

if (client) {

if there's a client connection then the network must be working. If not then either the network has stopped or nothing is connected. Well OpenHAB always maintains a connection.

So I've just added the

} else {

part to say the connection has gone. I also setup a timeout by counting the micros() since boot. so it's not constantly firing the reboot.

I then raise digital pin 3 which is linked to my 555 timer circuit, which causes the power cycle.

unsigned long resetCounter = micros();
int rebootAborted = 0;

void processEthernetMessages() {
	char inputString[MQTT_MAX_PACKET_SIZE] = "";
	uint8_t inputSize = 0;
	EthernetClient client = server.available();
	if (client) {
                resetCounter=micros();
                if (rebootAborted) {
                  Serial.println("Rebooting Aborted");
                  rebootAborted = 0;
                }
		while (client.available()) {
			char inChar = client.read();
			inputString[inputSize] = inChar;
			inputSize++;
		}
#ifdef TCPDUMP
		Serial.print("<<");
		char buf[4];
		for (uint8_t a=0; a<inputSize; a++) { sprintf(buf,"%02X ", (uint8_t)inputString[a]); Serial.print(buf); } Serial.println("");
#endif
		gw.processMQTTMessage(inputString, inputSize);
	} else {
          if ((micros() - resetCounter) >= 100000000 && !client.connected() && !rebootAborted) {
              rebootAborted = 1;
              Serial.println("Rebooting");
              pinMode(3,OUTPUT);
              digitalWrite(3,HIGH);
              delay(100);
              digitalWrite(3,LOW);
          }
       }
}

[pit007]

Yes - noooo :-) Right - you are able to detect the connection loss (good to know) but why do you not trigger the NE555, but to re-init the ENC28. Have you try if it response via SPI ?

[GuyP]

It completely locks up.. I tried to talk with at the same point but it doesn't seem to listen to anything