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By obenavidez
#63789 Hello i have an ESP8266 with NodeMCU 0.9.6 build 20150704, is connected to a li-po 3.7V and 500mAh, in the VCC and the GND, i want to know if there is a way to read the battery level from LUA and turn on a led if is low the battery, or i need some special hardware configuration, thanks for your help.
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By marcelstoer
#63809 The first thing really with such ancient firmware is to build a recent and supported version:

Then you flash the binary:

Then you use the ADC module to retrieve the information you need:
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By trackerj