Hello.
I have a shelly 1 with temperature addon connected with DHT22 temperature and humidity sensor, but for some reason i cant find, sometimes the readings goes to 999 and i need to reboot to get everything working again.
I already checked all connections, tried another shelly, another DHT22, but the result is always the same.
Any help?
Hi and welcome to the forum. 
How did you connect the wires.
Soldering is the safest option. 
Yes, they are welded. look the pic.
Turn off the voltage on the Shelly. Switch on again after a few minutes.
That had helped me. It has happened once so far.
Is there any recommendation on DHT22 sensor model? There are sensors with resistor and without. Which on we need to use for correct operation with Add-on & Shelly 1PM?
Besides, where I can see the correct connection / wiring scheme?
Thanks!
