measure USB voltage on Lilygo ESP32 - SIM800L

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diedhert
Posts: 1
Joined: Tue Mar 10, 2020 6:56 pm

measure USB voltage on Lilygo ESP32 - SIM800L

Postby diedhert » Tue Mar 10, 2020 7:04 pm

Dear all

I have a Lilygo ESP32 - SIM800L powered via the USB port.
Is it possible to monitor the voltage, so when this drops below a certain point, it can send an sms message (battery low) ?

Regards
Diederik
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