https://mapfumo.github.io/tags/no_std/Recent content in No_std on Antony MapfumoHugo -- gohugo.ioen-usTue, 28 Apr 2026 12:21:14 +1000https://mapfumo.github.io/posts/2026/april/building-a-lorawan-sensor-network-in-rust-stm32wl55-embassy-and-the-bugs-that-taught-the-most/Tue, 28 Apr 2026 12:21:14 +1000https://mapfumo.github.io/posts/2026/april/building-a-lorawan-sensor-network-in-rust-stm32wl55-embassy-and-the-bugs-that-taught-the-most/<h2 id="from-sensor-to-dashboard--without-a-line-of-c">From Sensor to Dashboard — Without a Line of C</h2> <p>My previous projects used the STM32F446RE — a capable workhorse, but one that needs an external LoRa radio module wired up separately. When I decided to go deep on LoRaWAN, I wanted a chip where the radio was part of the silicon itself. The STM32WL55JC1 delivers exactly that: an ARM Cortex-M4 application processor and a sub-GHz radio coexisting on the same die, talking to each other over an internal SPI bus that never leaves the package.</p>