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Build an e-ink shopping list for the fridge

A developer built a fridge magnet shopping list on an M5Stack PaperMono with an e-ink touchscreen. It syncs with a phone web app over Wi-Fi and also works offline. The firmware is about 2,400 lines of C++, and all of it was written by Claude Code. He says the family already uses it every day, but this is the first thing he has built on the device, and only Wi-Fi is used so far.

Done with Claude CodeModerate

What was done

A developer built a fridge magnet shopping list on an M5Stack PaperMono with an e-ink touchscreen. It syncs with a phone web app over Wi-Fi and also works offline. The firmware is about 2,400 lines of C++, and all of it was written by Claude Code. He says the family already uses it every day, but this is the first thing he has built on the device, and only Wi-Fi is used so far.

How to do it

  1. Paste the prompt into the tool, and replace the text in brackets with your own.
  2. Read the answer through. Do not send, delete or publish anything until you have seen it yourself.
  3. Check the original before you trust a figure, a name or a date.

Try it with Claude Code

Write firmware for [device] that shows a shopping list on the screen and lets us tick off items by touch. The list must sync over Wi-Fi with a simple web app on the phone and work offline. Use [language and framework]. Show me the architecture and how syncing resolves conflicts before you write the code. You are done when an item added on the phone shows up on the screen and can be ticked off there.

Replace text in brackets with your own.

Read the original

Hacker News ·

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