Practice the embedded skills your interview actually tests. Write real C firmware in your browser, compile it for ARM Cortex-M4, and run it on a simulated STM32F4 with deterministic scoring.
Challenges span GPIO, UART, timers, SPI, I2C, DMA, watchdog, and RTOS. OhmWork focuses on diagnosis, state inspection, and hardware bring-up realism rather than algorithm puzzles, and also powers embedded-engineer interview assessments for hiring teams.
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