ESP12S WIFI temperature logger

It is a small PCB with an ESP12S on it and a DS18B20 temperature sensor. Every 1-5 minutes you can select that in the source code it will send the room temperature and the voltage of the 18650 Li-Ion cell to Here is a diagram of temperature and voltage and of course the real time temperature. After it has send the data to it will go into deep sleep mode with around 23uA. So the project should last at least 30 days without battery replacement.

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Aug 12,2020
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