Project Description:

The NodeMCU 4 Channel Relay Home Automation with Blynk App is a project that allows you to control electrical appliances in your home remotely using a Blynk mobile app. The project uses a NodeMCU microcontroller board and a 4 channel relay module to switch ON/OFF up to 4 electrical appliances. The Blynk mobile app is used to send control commands to the NodeMCU board via the internet.

Working Method:

The NodeMCU board is connected to the internet via Wi-Fi. The Blynk app is used to create a custom interface with buttons to control each of the 4 relays. The user can access the interface from anywhere in the world, as long as they have an internet connection.

When the user presses a button on the Blynk app, a command is sent to the NodeMCU board through the internet. The NodeMCU board receives the command and uses the 4 channel relay module to switch ON/OFF the corresponding electrical appliance. The user can receive feedback on the status of the appliances through the Blynk app.

To set up the project, you will need to connect the NodeMCU board to the 4 channel relay module and the electrical appliances that you want to control. You will also need to program the NodeMCU board to receive commands from the Blynk app and use the relay module to switch ON/OFF the appliances. Finally, you will need to create a custom interface on the Blynk app to control the relays.

Overall, this project provides a simple and effective way to control electrical appliances in your home remotely using a NodeMCU board, a 4 channel relay module, and a Blynk mobile app. It can be used to control lights, fans, air conditioners, and other electrical appliances in your home or office.