Use USB Serial to communicate but not power ESP

bgondell
Posts: 1
Joined: Fri Jun 26, 2020 7:41 pm

Use USB Serial to communicate but not power ESP

Postby bgondell » Fri Jun 26, 2020 10:24 pm

It's possible to use an USB cable to communicate and program ESP32 but not to power it? Circuit is external powered, but when I connect USB to program and debug, circuit voltaje raises up to 4,4 volts. Components of the circuit can manage this voltaje, but I can not calibrate since power is use as reference for many sensors.
Thanks in advance!!

ESP_Sprite
Posts: 3729
Joined: Thu Nov 26, 2015 4:08 am

Re: Use USB Serial to communicate but not power ESP

Postby ESP_Sprite » Sat Jun 27, 2020 7:27 am

In general, yes, that is possible. You probably want to know if it's possible to do this on your specific devboard, and we can't tell you that without knowing what devboard you use.

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jgustavoam
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Re: Use USB Serial to communicate but not power ESP

Postby jgustavoam » Tue Jul 28, 2020 2:38 am

Hi,
Please identify which ESP32 board you are using. Does it has integrated USB Interface?
Retired IBM Brasil
Electronic hobbyist since 1976.

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