Life & fun · November 19, 2025
F32 – An Extremely Small ESP32 Board
As part of a little research and also some fun I decided to try my hand at seeing how small of an ESP32 board I can make with functioning WiFi.
F32 – An Extremely Small ESP32 Board launched on November 19, 2025 with 302 votes, #75 of 9,796 launches that month and more than 99% of that year's launches.
In plain words
F32 is a minimalist ESP32 development board designed to explore how small a functional WiFi-enabled microcontroller can be. Created as both a research project and experimental exercise, the board maintains full ESP32 capabilities in an extremely compact form factor. It is intended for developers and hobbyists interested in space-constrained IoT applications or those curious about embedded systems miniaturization. The project is available on GitHub.
written from the facts on this page · September 2026
From the sources
Contribute to PegorK/f32 development by creating an account on GitHub.
The f32 is an ultra-compact ESP32 development board designed to mount directly behind a USB-C receptacle. The PCB measures just 9.85 mm x 8.45 mm. It's powered by the ESP32-C3FH4 microcontroller and was created primarily for research and as a bit of a stress test for the ESP32, since it intentionally ignores many standard design guidelines. There's only one exposed GPIO and it is connected to an onboard LED, so most of the development on here would be more catered for wifi/web. To test the f32 an example application was created that users can interact with. The application turns the f32 into a captive portal so when it's powered on it will show up as an open access point that the user can…from github.com
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