WiFi Temperature Sensor with NodeMCU/ESP8266

With all the buzz around ESP8266 chips, I decided it was time to give it a go. If you are not familiar with ESP8266 chips, they are basically damn cheap (~ 3 €) WiFi chips that can also run your Arduino code. I bought on eBay a NodeMCU and had it up and running in Arduino IDE in no time. The project I’m talking about below is a DS18B20 sensor sending temperature data to a MQTT topic so that my home automation system (Jeedom with the MQTT plugin) can display it. »