I managed to associate the Merten 507502 (which is pretty the same one but with two channels). Before including them you have to exclude it from the previous inclusion or to reset it. Just press three time in a row in less than 1,5s the small black button and then keep it pushed for more than 5s ...

Good evening to all, I have a small question about Z-Wave I want to use to interface my old Merten switches (Schneider Electric Group) before the Z-Wave was abandoned by Merten. I have installed a RAZBerry2 module (ZWave.me) on my RaspberryPi4 and I have installed it correctly under Domoticz 2020.2 ...