I can’t say definitively what is going on. When it restarts it is timing out doing a query, which could be the Graph+ that you say you leave running, or possibly Home Assistant if you are using that.
If I had to guess, and I suppose I do, I would suspect the SDcard is bad. Replacing it would be the next diagnostic step.
Sometimes it becomes necessary to remove the microSD card. You may need to replace it or look at the message log if the device isn’t working, or maybe you want to back up the datalogs. For whatever reason, it’s best to be careful as the type of holder and position makes it easy to damage during removal.
Power down the IoTaWatt by removing the USB power plug and AC reference plug.
If mounted to a wall, remove the mounting screws.
Remove the four Philips head screws in the back.
Remo…
It can become necessary to build a new SDcard. This post describes how to do that. IoTaWatt uses a microSD card, formatted to FAT32. New units use a 8GB level 10 card. Any card 4GB-32GB level 4 or 10 will work fine.
Obtain a new microSD card or reformat an old card to FAT32.
Download the SD files from github SD directory
If using windows, this link will downlod the files into a .zip file.
Copy the files to the root of the SDcard.
If you were able to salvage the config.txt file from the ol…