Powering ESP8266 from Adafruit PowerBoost 500 Charger without USB

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H3inz3lmann
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Joined: Sun Mar 05, 2017 2:37 pm

Powering ESP8266 from Adafruit PowerBoost 500 Charger without USB

Post by H3inz3lmann » Wed Mar 08, 2017 9:17 am

Hi again,

it looks like there is a 5v input Pin on the ESP-Board so I want to Power it without USB to save space.
I managed to tap 5v from the chargers pins, but the ESP doesn't do anything.
Does anyone has an idea why I'm not able to power the ESP like this.

Best
Matthias

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Roberthh
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Location: Rhineland, Europe

Re: Powering ESP8266 from Adafruit PowerBoost 500 Charger without USB

Post by Roberthh » Wed Mar 08, 2017 1:23 pm

If you connect 5V and GND, I expect the ESP board to run. B.T.W: which ESP board are you using? And how do connect the Charger & the ESP board?

H3inz3lmann
Posts: 8
Joined: Sun Mar 05, 2017 2:37 pm

Re: Powering ESP8266 from Adafruit PowerBoost 500 Charger without USB

Post by H3inz3lmann » Wed Mar 08, 2017 1:44 pm

I'm using the NodeMCU v2 board.
I've connected the Pins GND and 5v from PowerBoost 500 to the vin and GND pin on esp8266(next to the resetbutton).
So I also expect the ESP board to run, but it is not doing anything

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Roberthh
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Location: Rhineland, Europe

Re: Powering ESP8266 from Adafruit PowerBoost 500 Charger without USB

Post by Roberthh » Wed Mar 08, 2017 2:14 pm

Looking at the schematics, the problem may arise from the USB/Serial chip not being powered, and then GPIO0 is at low level. Try to pull up GPIO0 e.g. with an 10k resistor, or use an USB cable to connect the PowerBoost with the ESP.

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