QuickJS with durable execution: suspend running JS, snapshot the whole heap, resume it in another process. Native TypeScript, a REPL that survives restarts, Rust bindings.
This firmware turns a cheap ESP32 board into a wireless AirPlay 2 speaker. Plug it into an amplifier or powered speakers and it shows up on your iPhone, iPad or Mac just like a HomePod or an AirPlay TV.
PlatformIO library LVGL Drivers for Sunton Smart display boards (CYD Cheap Yellow Display). This library supports these boards without any effort. ESP32-2432S024N/R/C, ESP32-2432S028R/C, ESP32-3248S035R/C, ESP32_8048S070N/C
CH32V003 is an ultra-cheap RISC-V MCU with 2KB SRAM, 16KB flash, and up to 18 GPIOs that sells for under $0.10
C99 firmware core for a 16-series LFP pack. Independent charge and discharge FETs, cell protection, coulomb SOC, and the current and voltage limits an inverter follows. Passive balance runs for 1.0 s, then 200 ms off, so the fault wait finishes on an unloaded sample. No RTOS, no heap. The AFE driver and fieldbus stay on your board.
Desk device that mirrors live Claude Code session state onto a Cheap Yellow Display over BLE
4th generation Mimalloc: fixes large alloc peak memory, same speed class. Cut large-buffer peak RSS > 50%. Memory purging, pprof heap profiling. Drop-in for C and Rust