In this IoT project, I have made the Alexa Smart Home Automation system using NodeMCU ESP8266 & Relay Module. You can control lights, fans, and other home appliances with the voice command. I have used only the Amazon Alexa app to connect the Echo Dot smart speaker with the NodeMCU.

JLCPCB Prototype for $2(Any Color): https://jlcpcb.com

Download PCB Garber file for this NodeMCU project
https://drive.google.com/uc?export=do...

Required Components for this Alexa smart home project
1. NodeMCU or ESP32 board https://amzn.to/3fJA4EG
2. Relay Module https://amzn.to/2BQ5Y3o
3. Alexa Echo Dot https://amzn.to/2PkTOTe

Required Components for Relay Module:
1. Relays 5v (SPDT)
2. BC547 Transistors
3. LED 5mm
4. 220-ohm Resistors
5. Connectors

Download Code for this Alexa Home Automation projects
https://drive.google.com/uc?export=do...

During the video, I have shared the circuit diagram for this Alexa control home automation and also explained the code for this IoT project. This is a very simple home automation project, so you can easily make this smart home device with NodeMCU and Relay module. I have also shown how to set up the Amazon Alexa app for this smart house project. You can control up to 10 home appliances with Alexa.

There is a limitation, the NodeMCU, and the echo dot smart speaker should be connected with the same wifi network.

If you face any issue please let me know in the comment section.

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