MCP to control LEDs
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A person on Reddit created a MCP to control a single LED bulb via natural language – it does look like an overkill, but that's not the point. The person asks it to blink the LED twice, and it does that. Beautiful.
The tech used are:
- Board/SoC: Raspberry Pi CM5 (a beast)
- Model: Qwen-2.5-3B (Qwen-3 l'm working on it)
- Perf: ~5 tokens/s, ~4-5 GB RAM
And the control pipeline is explained as:
MCP-server + LLM + Whisper (All on CM5) → RP2040 over UART → WS2812 LED
And not to mention that everything runs locally on the Raspberry Pi CM5 device, and here's the entire code on GitHub that one can use.
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