Alternative to Shelly H&T Gen3 – Looking for Real-Time Temperature Sensor!

Hardware
1

Hey everyone,

I bought the Shelly H&T Gen3 thinking it would be a smart and reliable solution for temperature and humidity monitoring. Unfortunately, it’s completely useless for my needs. It only measures every 5 minutes, even when powered via USB-C, and constantly goes into sleep mode. You can’t even tweak the settings properly without it going back to sleep. :sweat_smile:

I’m looking for an alternative that:
:white_check_mark: Offers fast measurement intervals or real-time readings
:white_check_mark: Has a power supply option (USB C)
:white_check_mark: Integrates with Home Assistant

Does anyone have a recommendation? What do you use for fast temperature/humidity monitoring, e.g., for bathroom fan control?

Appreciate any tips! :raised_hands:

2

If you want to go cheap, a DS18B20 Temperature Sensor connected to an Wifi ESP32 board will do it. The reading interval is programmable within the ESPHome code. I have mine set to 20s

If you want to go more expensive but Zwave, a DS18B20 Temperature Sensor connected to a Fibaro Implant will do same.

I have one of each taking readings to keep a chest freezer at refrigerator temperatures.

EDIT: I think you could also use a DHT11 or DHT22 and then get temperature and humidity. I don’t use either so can’t comment on quality or accuracy.

1 Like
3

KMeterISO attached to an ESP32.

With a k-type probe, it’s mere seconds to hit measured temp.

Battery powered? A disassembled INKBIRD TH2, or a Xiaomi Mijia round thermometer. Steer clear from Qingpings they are not accurate.