Observed arrival · 2026-09-18

Ferrox-RC: Rust firmware for a $40 radio

ferroxrc.com Visit website

Editorial interest 79/100 Selection signal · not a rating of the site

A bare-metal Rust operating system for the FlySky FS-i6X RC transmitter, with an emphasis on memory headroom, radio timing, and simulator control.

Landing page captured for the 2026-09-18 issue.

For: FlySky FS-i6X owners and embedded Rust developers
Worth noticing: The stated firmware image is 70.4 KB, leaving 57.6 KB free on a 128 KB STM32F072VB.

Field notes

The firmware targets an STM32F072VB running at 48 MHz and avoids dynamic allocation and RTOS overhead. The page reports 70.4 KB of Flash use, 2.7 KB of stated RAM allocation including the LCD buffer, and a 260 Hz radio path. Its flashing links point to a GitHub-based workflow modeled on OpenI6X, while the homepage also documents USB HID, DMA, timer, and A7105 transceiver work.

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Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

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