General TRMNL info

I bought a TRMNL and their docs are pretty bad, so I’ve made a list here of various info I managed to find.

• A guide for making your own TRMNL with an ESP32, it includes pinout info and how to mod the firmware. It’s in Russian, but what even are languages.
• After talking to the TRMNL team, it seems that the developer fee allows you access to the API, which lets you fetch the image that is displayed on your device. If you don’t have a device, you can buy a single virtual device for a $50 fee. This basically buys you an API key, so you can access their API.

Last updated on April 11, 2025. For any questions/feedback, email me at hi@stavros.io.