One GW with 2 controllers?

[skywatch]

Is it possible to have one arduino gw connected serially to a pi running 2 different controllers.
I have problems with crashes and would like to isolate where the problem lies, so having 2 different controllers would help eliminate 'something' from the fault finding process....

[dbemowsk]

@skywatch No because only one controller would be able to read from the serial port at a time. Even if you possibly did 2 RS485 serial modules on the same board connected in parallel. You would have to set each controller to act as a master device and each one using a different RS485 interface. If a node would expect a response from the master controller, which one should respond? Both cannot respond as master.

[mfalkvidd]

@skywatch yes it can be done but there are some caveats. See https://forum.mysensors.org/topic/3150/use-node-red-to-allow-multiple-connections-to-ethernet-gateway for some ideas on how to do it.

Other threads that might be interesting:
https://forum.mysensors.org/topic/1853/production-setup-how-do-you-guys-do-it
https://forum.mysensors.org/topic/2815/flow-to-turn-serialgateway-with-mqtt-flow-to-ethernetgateway
https://forum.mysensors.org/topic/2681/mycontroller-domoticz-at-same-time/

[tbowmo]

The trick is to have one program listening on the serial port, and have that program act as a sort of proxy for the controllers...

This can be done with node-red, as @mfalkvidd mentions, and is how I do it. I have both domoticz, and a test instance of openhab running. One benefit of using node-red, is that it can be used to manipulate data to/from the mysensors network (For example, domoticz has "locked state" for doors etc reversed, compared to all other controllers, so I have node-red invert the command to / from domoticz, if it's a door lock, so now domoticz is "compliant" with the other controllers that I mock around with.

[skywatch]

Thank you all for taking the time to reply.

I will take a look at the documentation, but then realised I could just have one controller at a time running to test at first (doh!)... ;) -

Still, this really is all about an end product that works for my needs with learning new stuff into the bargain. :)

I'll let you know if I do need to try it - nice to know it's an option!