Get Sensor Value and Send to MQTT

Why is ESP3266?

ESP3266 is a low-cost WIFI microchip with the use of TCP/IP capability. It is produced by Espressif System in Shanghai, China.

For environment development, we will use Arduino IDE which is available on Mac, Windows, and Linux. https://www.arduino.cc/en/main/software

For this part, we will divide into 2 sections which are "Connect ESP3266 with temperature sensor" and "Connect ESP3266 to MQTT".