I’m clearly not familiar with alarm management in Zigbee environment. I used DDF proposed by @Swoop related to issue https://forum.phoscon.de/t/heiman-warningdevice-ef-3-0-siren-no-battery-and-tampered-status/2346 opened by @monpelaud. I just added ZHABattery as a suggestion because the specific cluster 0001 has attributes for that purpose.