It took some time to get them working. I found that the modules sent were an old version of the ESP-01 at 512k vs 1m in the newer versions. I've also had issues with random module crashes due to older ESP-01 modules. I decided it wasn't worth the time and replaced them with new ESP-01 modules as they happened to go from 5 to 90 minutes. The module didn't register until I unplugged it, turned it on, and then plugged the ESP back into the outlet. Standard wrong temperature issue due to receiving heat signals from the module and voltage regulator, but nothing that couldn't be fixed.
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