This guide refers to the temperature on the screen of the Shelly. The temperature in the Havenwise app might be slightly different to what is on the scren for the Shelly - this is normal and nothing to worry about.
If the temperature from your Shelly H&T Gen 3 sensor hasn't updated in a few hours in the Havenwise app, it usually means the sensor is not powered or has lost internet connection.
Step 1: Check power
If the device isn't powered, then there will be no time on the device, or the time will be wrong. This is because it uses an e-ink screen that remains on even with no power. If the current time is correctly displayed, go to Step 2.
If using batteries
Remove the current batteries
Reinsert the batteries, ensuring they are seated correctly
Check a time is now displayed on the device
If the time still isn't displayed, try a brand new set of batteries
If there still isn't a correct time, then please try using a USB-C cable, described below
If using a USB-C cable
Unplug the cable from the Shelly
Check there are no batteries in the device
After waiting 5 seconds, plug it back in
Check a time is now displayed on the device
If the time still isn't displayed, try another USB-C cable. You can check if the original cable is working with a phone or another device
Step 2: Check Wi-Fi connection
Ensure you have completed checked the power first in Step 1.
Make sure your Wi-Fi is working normally, checking your other devices are connected and can use the internet fine
Ensure the sensor is within range of your Wi-Fi, by checking the signal bars on the Shelly. If it is weak, move it closer to your router or use a Wi-Fi repeater
If issues continue, please contact Havenwise support for further help.