idmeters variable required! Ej: ISKT372M50726783,109162786<br>http://46.51.135.242/coap_server/coap_client_firmwareupdate_ONDEMAND_v13.php?iddevice=109162786&idmeters=ISKT372M50726783,109162786&url=http://192.168.1.144:8000/1.0.1b/flash/firmware.bin&imageActivationTime=2022-01-01T00:00:00