ESP8266 - Reading the Vcc

This is a quick summary of how to read the Vcc of ESP8266.

Arduino Sketch

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// Source: https://github.com/esp8266/Arduino/issues/3800 ADC_MODE(ADC_VCC); void setup() { Serial.begin(115200); } void loop() { int vcc = ESP.getVcc(); Serial.println(vcc); delay(1000); }