VCC is the power supply pin of the soil moisture sensor that can be connected to 3.3V or 5V of the supply. But do note that the analog output will vary depending on the provided supply voltage. GND is ...

In our previous tutorial learned about SPI communication in Arduino. Today we will learn about another Serial Communication Protocol: I2C (Inter Integrated Circuits). Comparing I2C with SPI, I2C has ...

A comprehensive tutorial on getting started with MQTT protocol using NodeMCU, MQTTBox and Node-RED. This tutorial will get you started on working with the NodeMCU, and using MQTT protocol to publish ...