PicoLock

This project is a lock system for the Raspberry Pi Pico, implemented in MicroPython. It uses a combination of a servo motor, a keypad, a buzzer, and an SSD1306 display to provide a secure and interactive locking mechanism.

Wokwi

Components

• Raspberry Pi Pico: Microcontroller
• Servo Motor: For locking and unlocking
• Keypad: For entering the access code
• Buzzer: For sound notifications
• SSD1306 Display: For showing status and prompts

Overview

The lock system provides a way to control a lock via a servo motor. Users can interact with the system through a keypad to enter a predefined code. The SSD1306 display shows prompts and status messages, while the buzzer provides audio feedback.

The system features:

• Lock and unlock functionality controlled by a servo motor.
• Code entry with up to 3 attempts before locking out for a predefined time.
• Autolock feature that locks the system after a predefined length of inactivity.
• Visual feedback on the SSD1306 display.
• Audio feedback through the buzzer.

Installation

Hardware Setup

1. Connect the Servo Motor:

   • Connect the servo control wire to a PWM-capable pin on the Raspberry Pi Pico.

2. Connect the Keypad:

   • Connect the keypad rows and columns to available GPIO pins.

3. Connect the Buzzer:

   • Connect the buzzer to a GPIO pin.

4. Connect the SSD1306 Display:

   • Connect the display’s SDA and SCL pins to the corresponding I2C pins on the Raspberry Pi Pico.
   • Use a 400kHz I2C frequency for communication.

5. Define Pins in pins.py:

   • Define the pin assignments in the pins.py file. Ensure that your pin definitions match the connections you've made.

Software Setup

1. Install MicroPython:

   • Ensure MicroPython is installed on your Raspberry Pi Pico. Follow the official guide if needed.

2. Upload the Code:

   • Use a tool like Thonny to upload the provided MicroPython scripts to your Pico.

3. Dependencies:

   • Make sure you have the ssd1306 library available in your MicroPython environment. You can typically find this library in the MicroPython package repository or online resources.

Images

pins.py

pins.py contains the pin definitions for connecting the hardware components: Please ensure that the pin assignments match your hardware setup.

Troubleshooting

• Display Issues: Ensure the I2C connections are correct and the ssd1306 library is installed.
• Keypad Not Responding: Verify the keypad wiring and GPIO pin assignments.
• Servo or Buzzer Not Working: Check the connections and ensure the pins are correctly defined in pins.py.

License

This project is licensed under the MIT License.