BLE should draw less power. Wifi is too power hungry to run on batteries. I first bought two Shelly wifi sensors but then switched to Sonoff Zigbee enabled sens

BLE should draw less power. Wifi is too power hungry to run on batteries. I first bought two Shelly wifi sensors but then switched to Sonoff Zigbee enabled sensors because the wifi devices only send a couple of samples a day. BLE a better choice but unfortunately most consumer IoT BLE enabled sensors come with proprietary junk and encrypted protocols (Xiaomi, looking at you) most of them are not worth the hassle.