Troubleshooting Connection Issues with SZ-SRN12N Siren on Zigbee2MQTT

Hi Pepe RUBIANES,

I’m guessing the siren is outdoors. You may have a signal problem out there.
My suggestion would be to put a routing Zigbee device closer to the siren and see if the mesh will pick it up better.
Here are some Zigbee info and tips: