Hi @phc606 Powermax can only deal with one serial connected device at a time, hence you would have to remove the Powerlink in order to do any kind of integration with another platform. That said, the replacement can easily support all of the same features (along with tons more - and you can always switch back if you dont like it). I thought that Domoticz already had a Visonic integration, though I think it might need a serial connection to the alarm directly (hence the NAS would need to have serial on board). This integration actually supports MQTT, which I am positive that Domoticz supports, hence you wouldnt even need to go via a SmartThings Hub, or IFTTT. You would just need to configure Domoticz to set up a MQTT server, and then the Wemos will post messages to relevant topics in Domoticz which can be interpreted to give all kinds of other triggers. Unfortunately I dont think I can help you much with that side of things as I dont have Domoticz, but I am pretty confident it would be trivial once you understand MQTT on Domoticz, and the Domoticz forums are also bound to help you. If you wanted to give it a go I can provide some support, but only in so far as getting the MQTT messages to be received by the NAS which should actually be super easy anyway! What model of Powermax do you have? Just make sure if you have the Powermax+ you also get an Arduino.
@passy I remember now that I had an action to go through the PMAX library and tidy up the changes I have made in order to be able to publish to Github. What is it you are trying to do for now? The firmware a few posts up on this thread has a number of improvements including MQTT integration, better serial initialisation (which helps on some Powermax models), and some WiFi fixes which add a bit of security to the Wemos (due to a more recent build of the ESP8266WiFi library). If you dont need those, then get started with what you have, and you can always comment out the Pmax_ALARM line, I dont think any other changes will stop the compilation.