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So the ADC of the ESP8266 would get 4.2 * 100 / 420 = 1V with a fully charged 18650. 1V is the max input to the ADC and will give a raw reading of 1023. We consider that the battery is 0% when the ...

Despite a wealth of tutorials for setting up and writing code for the ESP8266 WiFi module, there has not been much of anything on programming this cheap wireless module with the Arduino IDE. Finall… ...

One of the great things about the Arduino environment is that it covers a wide variety of hardware with a common interface. Importantly, this isn’t just about language, but also about abstrac… ...