The Gen 4 devices now also have the Zigbee wireless standard on board and are officially Matter certified. (i.e. Wifi, Bluetooth and Zigbee) A Blu H&T or Motion can simply transmit the temperature and humidity or movement to the Internet via a Gen3 or Gen4 device. The Shelly works as a Bluetooth bridge, so to speak. I would have to test whether you can get a Shelly to switch directly with a Motion without automation