@Bipman I can hopefully tell you my experience with the ENV PRO soon. I am trying to connect it with the M5 Dial but had problems so far. Do you know if the M5 sensors they sell are all compatible with their devices Atom, Stack, Stick, Dial, etc. or just some of them ?

@usYmat Yes. I am using it to connect to an Android app over BLE. You can look up sampel code for ESP32 for Bluetooth pairing to a device. Seems to work ok.