Add MMM-SenseHat third-party module for Raspberry Pi Sense HAT

[GEmanuel2558]

Summary

This PR adds MMM-SenseHat, a third-party MagicMirror² module that integrates the official Raspberry Pi Sense HAT. It displays sensor readings (temperature, humidity, pressure, optional orientation) and can control the Sense HAT 8×8 LED matrix for status colouring or scrolling text.

The module lives entirely under modules/MMM-SenseHat and does not modify core functionality.

---

What’s included

• New module folder: modules/MMM-SenseHat
  • MMM-SenseHat.js
    • Frontend module that renders:
      • Temperature (°C/°F)
      • Humidity (%)
      • Pressure (hPa)
      • Optional orientation (pitch/roll/yaw)
    • Handles loading / error / data states
    • Supports LED “status” mode with threshold-based colouring
    • Supports LED “text” mode with configurable text and RGB color
    • Multi-instance safe using identifier so multiple MMM-SenseHat instances can coexist
  • node_helper.js
    • Manages one polling loop per module instance
    • Spawns the Python helper on an interval to read sensors
    • Forwards sensor JSON and errors back to the correct instance via identifier
    • Accepts LED commands per instance
    • Supports config.pythonPath and config.pythonName (alias, for familiarity with MMM-PythonPrint)
  • python/reader.py
    • Uses from sense_hat import SenseHat
    • --read mode: reads temperature, humidity, pressure, orientation, accelerometer, gyroscope, magnetometer
    • Prints JSON to stdout in a stable schema
    • LED control (status colour, text, clear) via CLI arguments
    • Gracefully handles partial sensor failures (e.g. humidity init issues) by returning null values instead of crashing
  • README.md
    • Overview, features, installation and configuration
    • Links to official Sense HAT product page & documentation
    • Troubleshooting steps (i2c detection, kernel messages, Python tests, LED tests)
    • Multi-instance usage example
    • Screenshot and hardware image references
  • Images:
    • images/mmm-sensehat-dashboard.png
    • images/mmm-sensehat-hardware_1.jpg
    • images/mmm-sensehat-hardware_2.jpg

---

Usage (short example)

Add to config/config.js:

{
  module: "MMM-SenseHat",
  position: "top_right",
  config: {
    updateInterval: 5000,
    showTemperature: true,
    showHumidity: true,
    showPressure: true,
    showOrientation: false,
    temperatureUnit: "C",
    roundValues: 1,
    ledMatrixEnabled: true,
    ledMode: "status", // "off" | "status" | "text"
    ledText: "Hello from Sense HAT",
    ledColor: [0, 255, 0],
    criticalThresholds: {
      temperatureHigh: 30,
      temperatureLow: 10,
      humidityHigh: 80,
      humidityLow: 20
    },
    debug: false
    // optional:
    // pythonPath: "/usr/bin/python3",
    // pythonName: "/usr/bin/python3"
  }
}

[sdetweil]

You need to put this on your own GitHub repo , and add it to the 3party module list, by editing the wiki here
https://github.com/MagicMirrorOrg/MagicMirror/wiki

[GEmanuel2558]

You need to put this on your own GitHub repo , and add it to the 3party module list, by editing the wiki here https://github.com/MagicMirrorOrg/MagicMirror/wiki

Thanks for the feedback! I moved this into a standalone third-party module:
https://github.com/GEmanuel2558/MMM-SenseHat

I’ll add it to the 3rd-party modules wiki as suggested, so this PR can be closed.

[GEmanuel2558]

Thanks for the review and guidance.
Based on your feedback, I’ll move this Sense HAT integration into its own third-party module repository and add it to the 3rd Party Modules list in the MagicMirror wiki.

Because of that, this PR is no longer needed, so I’m closing it now.