About NodeMCU NodeMCU is a very popular Micro controller with wifi access. It is based on ESP8266 – a cheap but powerful chip  and fully support Arduino IDE. If you familiar with Arduino IDE, you can program NodeMCU in no time. Objective In this project, we will connect NodeMCU to get light strength from Photoresistor and … Continue reading Use NodeMCU to publish light sensor value to internet through MQTT