บริการเขียนเฟิร์มแวร์ Embedded / IoT

Embedded / IoT Firmware Development Service

I build firmware for ESP32, STM32, RP2040/RP2350 and other MCUs, handling sensors, communication protocols, and cloud/backend integration.

If your hardware is ready but the firmware isn’t stable yet – or you’re moving from quick Arduino sketches to production-grade code – this service is designed for you.

I focus on long-running embedded systems that talk to multiple devices and integrate with PCs, servers, or the cloud using standard protocols such as MQTT, HTTP, Modbus, RS485, CAN, or LIN.

Platforms and languages I work with

  • ESP32 / ESP32-S3 (ESP-IDF or Arduino-based)
  • STM32 (HAL/LL, CubeIDE or CMake flows)
  • RP2040 / RP2350 (Pico SDK, plus MicroPython for some cases)
  • Other MCUs on request (AVR, PIC, NXP, etc.)
  • C / C++ as the main languages for production use
  • Layered code structure (driver / HAL / application) where appropriate
  • Optional documentation such as README, diagrams, and usage notes

Example features I can implement

Connectivity and communication

  • MQTT (v3/v5), HTTP/REST, WebSocket
  • Modbus RTU/TCP, RS485, RS232
  • LIN and CAN (MCU & transceiver dependent)
  • BLE / Wi-Fi connectivity for IoT devices

Control and data processing

  • Multi-sensor acquisition and processing
  • Basic PID / control loops for motors or temperature
  • Data logging to SD card (FAT/exFAT) or internal flash
  • Real-time handling with RTC and proper timestamps

Reliability and maintainability

  • Watchdogs, error handling, and fail-safe logic
  • OTA updates (over Wi-Fi/MQTT/HTTP depending on the design)
  • Remote logging and diagnostics via serial, TCP, or MQTT

Firmware development workflow

  1. Collect requirements: what the system must do and talk to.
  2. Sketch a software architecture (tasks, modules, protocols).
  3. Implement core features and test on the real hardware.
  4. Add logging/debug hooks so your team can maintain it later.
  5. Deliver source code plus build/flash instructions and examples.

FAQ about this firmware-development service

Do I need to have the hardware ready first?

Having the board ready helps, but if you don’t, we can also design the circuit and PCB via the Circuit Design and PCB Design services.

Can my team continue development on the delivered code?

Yes. The codebase is structured with maintainability in mind, and comes with a README explaining the layout and build/flash steps.

If you need an embedded firmware engineer to bring your hardware to life, feel free to share your requirements and we can discuss the best approach.

📧 Email me your firmware project needs ← Back to all Services