Review of cardputer-ai
The M5Stack Cardputer is a wonderfully weird piece of hardware: a credit-card-sized device with a tiny screen, a small keyboard, an ESP32 microcontroller, and a battery. It costs about $30. It's the kind of device that hackers love because it begs to be put to novel uses.
cardputer-ai is firmware and example projects that bring AI capabilities to the Cardputer. Think: pocket voice assistants, portable AI note-takers, AI walkie-talkies, dedicated AI devices for specific tasks. The AI runs on the cloud (the ESP32 isn't powerful enough for local LLMs) but the device handles input/output, networking, and UI.
Voice assistant that listens and responds through the Cardputer's mic and speaker. AI notepad that takes typed notes and summarizes them. AI walkie-talkie that transcribes and translates speech. Custom AI keyboard shortcuts that send prompts to Claude and display the response.
ESP32 has limited RAM (320KB) and modest CPU. The AI lives in the cloud, so you need WiFi. Battery life is 1-2 hours of active use. The tiny screen and keyboard are charming but slow for serious work.
If you have a Cardputer (or are thinking of getting one), cardputer-ai is the starting point for any AI project. If you don't have one, this won't convince you to buy one - it's a hobbyist tool, not a productivity tool. But for the price ($30) and the form factor (fits in your wallet), it's a uniquely fun platform for AI experiments.
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