I will develop esp32, stm32 or nrf52 ble firmware with freertos or zephyr

Your device crashes, resets, drains its battery, or needs a feature you don't have time to write. I work in C/C++ on ESP32 (ESP-IDF, Arduino), nRF52 (BLE with Zephyr / nRF Connect SDK) and STM32, with FreeRTOS.

What I can do:

• Fix crashes, watchdog resets, hard faults and memory issues
• Add BLE (GATT services, advertising), Wi-Fi, LoRa, Modbus RTU over RS-485 or a sensor driver (I2C/SPI/UART)
• Cut power consumption: deep sleep, peripheral shutdown, wake sources
• Structure FreeRTOS tasks, queues and timers so the code stays maintainable

How I work: I reproduce the problem first and fix the root cause, not the symptom. Every change is explained so you can maintain it.

From my own projects:

• LoRa node (ESP32-S3 + SX1262): radio driver written from scratch, CRC16 packet protocol, FreeRTOS, deep sleep
• ESP32-S3 low-power node with a per-component sleep budget
• Custom nRF52840 BLE board, designed, fabricated and assembled

I also design PCBs, so I can tell a firmware bug from a hardware problem.

Message me before ordering with your MCU, toolchain and a short description of the problem.