I will write embedded c firmware for stm32 esp32 rp2040 and arduino

• Firmware that works on real hardware, written by someone who designs the boards too. Tell me the microcontroller, the peripherals, and what it needs to do. You get clean, documented, working code.

WHAT I BUILD

Peripheral drivers (I2C, SPI, UART, USB, ADC, DMA, timers, PWM), sensor integration, wireless (WiFi, Bluetooth/BLE, GSM), power and sleep management, state machines, bootloaders and OTA update paths.

PLATFORMS

STM32, ESP32, ESP8266, RP2040, AVR/Arduino, 8051

WHAT YOU GET

Complete source code that is yours outright, clear comments and a README, hardware test notes so you can verify it yourself, and revisions until it behaves correctly.

I ALSO FIX BROKEN FIRMWARE

Code that compiles but misbehaves, an I2C bus that hangs, a sensor returning garbage, a device that will not wake from sleep. Send it over.

WHY ME

I am an embedded hardware engineer with 5+ years across medical devices, IoT and industrial products. I read your schematic before writing code, because most firmware bugs are actually hardware misunderstandings.

Message me with your MCU and requirements for an honest scope and price.