Introduction

Home automation is the process of making your home more timely, comfortable, and energy-efficient by installing and connecting devices that automate tasks and systems around your home. A Raspberry Pi Pico home automation system can do all of this and more, by connecting devices like lights, appliances, sensors, and thermostats to the Internet and controlling them remotely using a smartphone or computer.

All you need is a Raspberry Pi Pico Board, Bluetooth module, relays, wires and an android phone for control. There is a large scope of home automation applications that we can build easily by using the Raspberry Pi Pico board.

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Supplies for Raspberry Pi Pico Home Automation System

Components Required

1. Raspberry Pi Pico –  https://amzn.to/3LgHC1s
2. Bluetooth Module HC-05 – https://amzn.to/3MJOGnF
3. 4 Channel Relay Module –  https://amzn.to/3Mr9UWZ
4. Jumper Wires –  https://amzn.to/38fpnuy
5. Breadboard – https://amzn.to/3OBy8jm

What is HC05 Module?

The HC-05 and HC-06 modules are Bluetooth modules that we can use to communicate with Raspberry Pi Pico via Bluetooth. HC-05 Bluetooth Module is one of the best ways to communicate wirelessly with the Raspberry Pi Pico.  For example, we can use it to control a LED Or Relay from a mobile or tablet.

HC-05 Pinout 

1. Enable / Key: This pin is used to toggle between Data Mode (set low) and AT command mode (set high). By default, it is in Data mode
2. VCC: To give power or current to the module, Connect to +5V Supply voltage or 3.3V pin.
3. GND: Connect to system ground(-).
4. TXD: Transmit Serial data. It is used to wirelessly receive data by the Bluetooth module.
5. RDX: Receive Serial data. When the Bluetooth module transmits data, the RDX pin is used to receive that data.
6. State: The state pin is connected to the onboard LED, It tells whether the module is connected or not Bluetooth and is used as feedback to check if Bluetooth is working properly.

What is Raspberry Pi Pico?

In February of this year, the Raspberry Pi Foundation released its latest microcontroller board, the Raspberry Pi Pico. At just US $4.00, the Pico is the cheapest board yet from the Raspberry Pi Foundation.

But don’t let the low price fool you, the Pico is a powerful little board. It features a Cortex M0+ CPU, 266MHz clock speed, 512KB of on-board flash storage, and 20 GPIO pins.

Raspberry Pi Pico Pinout

Schematics Diagram – Raspberry Pi Pico Home Automation System

The Circuit diagram is very straightforward. You have to connect the HC-05 Bluetooth module and Relay pins with Raspberry Pi Pico pins as per the schematic diagram. The schematic diagram is shown above. You may also follow the following pin mapping

Hc-05->Raspberry Pi Pico

• VCC -> 3.3V
• GND -> GND
• RX -> GP0
• TX -> GP1

Relay -> Raspberry Pi Pico

• GND -> GND
• IN1 -> GP2
• IN2 -> GP3
• IN3 -> GP4
• IN4 -> GP5
• VCC -> 5V

Prepare the Thonny IDE for Raspberry Pi Pico Board

Thonny is now prepared to program your Raspberry Pi Pico board.

• Getting Started Raspberry Pi Pico – Pinout, Specs – Beginner Guide

Source Code

Download app and full code from Github

main.py

Download Android App.

Now, Let’s make a mobile application, To make a mobile app I used kodular.

Final Working