“In this IoT project, I have shown how to make IoT-based Smart Home Automation using Multiple NodeMCU ESP8266 network to control all the home appliances from the pushbuttons & Blynk App. If the internet is not available, then you can control the home appliances from manual switches. During the article, I have shown all the steps to make this smart home system.
This ESP8266 NodeMCU control smart relay has the following features:
Connect multiple NodeMCUs with the same Blynk account.
Control home appliances with WiFi (Blynk App)
Control home appliances with manual switches.
Monitor real-time feedback in the Blynk App.
Control home appliances manually without internet.
For each room, you just need a relay module & NodeMCU to make this smart home project.
- Relays 5v (SPDT) (4 no)
- BC547 Transistors (4 no)
- PC817 Optocuplors (4 no)
- 510-ohm 0.25-watt Resistor (4 no) (R1 - R4)
- 1k 0.25-watt Resistors (5 no) (R5 - R9)
- LED 5-mm (5 no)
- 1N4007 Diodes (5 no) (D1 - D5)
- Push Buttons (4 no) or Switches
- Terminal Connectors
- 5V DC supply”