Shelly H&T is the worst H& T out there. I’ve got 4 of them in my house and they are just atrocious. I was looking up for a way to flash them with ESPHome but apparently Alterco refuses to share the GPIO pinouts.

　　

　　My gripe:

　　– The physical design is bad, I’ve got 2 running on battery & 2 on USB cable. With the USB hat connection you need to glue the H& T against something because the moment it gently twists the positive and negatives untwist from the cap and therefore loses power. Every 3-5 days or so I have to go and physically twist the caps on properly that it makes a connection again and comes back to life. The two miniature plastic “clips” to keep the two separate pieces in place are useless.

　　– The existing Shelly app is horrible

　　– The only real way to keep them “stable” to some degree is to:

　　1) configure a static IP on the device itself (like with all other shelly models)

　　2) DHCP reserve the IP on your router.

　　After I’ve bought them I started to build my own H&T sensors making use of ESP32 Dev Kit V4.1 and integrating it into ESPHOME with HASS. It works out more than 50% cheaper and stable from the bat off.