I have now a heartbeat response form the gateway.

For my test stetup I did not define any transport layer and this is probably the reason why the gateway did not respond to the heatbeatrequest from domoticz.

@grumpazoid You will indeed see that a changed value in Domoticz on one of your MySensor nodes will be published on the domoticz/out topic. This is because the node was presented to Domoticz at start up.
You are not able to access a non presented node directly by Domoticz through the gateway.

You can walk around that by creating a virtual sensor in Domoticz and a 'bridge' in Node red that translates MQTT to the MySensor.
Check https://www.mysensors.org/controller/nodered.

All works fine.
I can update Text sensor or send a switch command.
But when it comes to the heartbeat request there is no response form the gateway.
I

Hi,
I would like to capture the heartbeat request send by a controller (in my case Domoticz).
However this does not work within the receive funtction.
What did I overlook?

void receive(const MyMessage &message)
{
    if (message.type == I_HEARTBEAT_REQUEST) { 
      Serial.println("heartbeat request");
    }   
}```

I got a similar issue. Installed 2.2.0 beta and the gateway worked fine for some hours and then it stopped.
When I check the gateway function with :
sudo ./bin/mysgw -d
I only get these messages :

pi@raspberrypi:~/MySensors $ sudo ./bin/mysgw -d
mysgw: Starting gateway...
mysgw: Protocol version - 2.2.0-rc.1
mysgw: MCO:BGN:INIT GW,CP=RNNGL-Q-,VER=2.2.0-rc.1
mysgw: TSF:LRT:OK
mysgw: TSM:INIT
mysgw: TSF:WUR:MS=0

When i limit the lenght with

send(nikoBusMessage.setSensor(SIMULATIE_LCD_ADRES).set(payload,8));

I get this as output (ascci values of char) :
0;54;1;0;47;3132333435363738
Maybe a bug in library?

But indeed the solution with the nul character works fine.

Than

Hi,

I have :

// define my payload
char payload[8] = "12345678";
// define my myssage
MyMessage nikoBusMessage(0, V_TEXT);
// and sending the message in the program
send(nikoBusMessage.setSensor(SIMULATIE_LCD_ADRES).set(payload));

But when the message is send, a complete payload of 26 char is send.
How do I control the lenght of the payload that I want to send?

I tried :

send(nikoBusMessage.setSensor(SIMULATIE_LCD_ADRES).set(payload,8));

but then the asci value for each character of "12345678" is send in the payload.

@Reza

This is how you build your network.

I assume that you use these :

Node 1 is the MAX485 RS-485 Module connected to your gateway.
Node N is the MAX485 RS-485 Module connected to your last sensor of your network.

Between node 1 and N you can add addtional nodes but you need to keep the bus structure.

Important are the terminating resistors (1) and (2). They are R7 on the RS-485 module.
If you add modules between node 1 and node N and you have a failure in transmitting, check then with removal of R7 on that added node.

@Reza No. You need to have your gateway inbetween. Your controller can't "talk" directly with you MySensors network. Wee the picture from kimot.

@hek I was wondering if it could be useful to have an extra sensor that a bridge between the wireless and wire network.
This bridge is made between the SPI dealing with the wireless network and the hardware serial that is dealing with the wire network.
It would allow you to connect a remote wired network.

IF the CE pin for the radio (9) could be user defined, a 2nd thought (based on the bridge idea).
Can’t something similar be done for the serial gateway and make that one suitable for wired and wireless network in the same gateway?