Pico Power Monitor

MicroPython-based power monitoring system using a Raspberry Pi Pico and BH1750 light sensor for pulse detection.

Features

• Light pulse detection and counting for energy monitoring
• MQTT integration with Home Assistant
• Async/await architecture for concurrent sensor reading and MQTT publishing
• Syslog support for remote logging
• WiFi connectivity

Hardware Requirements

• Raspberry Pi Pico W
• BH1750 light sensor (I2C)
• LED indicator (built-in Pico LED)

Configuration

Copy cfgsecrets_template.py to cfgsecrets.py and configure:

• WiFi SSID and password
• MQTT broker hostname

Testing

This project uses UV for Python dependency management:

# Install test dependencies
uv sync --extra test

# Run tests
uv run pytest

# Run tests with coverage
uv run pytest --cov

Deployment

Use the deploy script to upload code to the Pico.

Architecture

• async_mqtt_client.py: Async MQTT client implementation
• lib.py: Syslog logging functionality
• main.py: Main application with sensor and MQTT tasks
• unittests/: Comprehensive test suite