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I will custom microcontroller firmware for esp32 with bluetooth, sensors and iot
Testimony pcb designs: Bringing you to the best electrical network
Embedded Systems Engineer | Custom PCB Designer | Bluetooth & IoT Specialist
I am a passionate and experienced Embedded Systems and Hardware Designer specializing in Bluetooth-enabled PCBs, microcontr...
About this Gig
I will develop clean, reliable, and professional Microcontroller Firmware for ESP32, ESP32-S3, ESP32-C3, STM32, and other ARM-based MCUs.
Whether you need a simple sensor node or a complex IoT device with Bluetooth, I deliver production-ready firmware tailored to your custom PCB or development board.
### What I Offer:
- Full firmware development in C / C++ (ESP-IDF, STM32CubeIDE, Arduino, Zephyr)
- **Bluetooth & BLE 5.x (Connection, GATT services, Beacon, Mesh)
- WiFi + Bluetooth dual-mode applications
- Sensor integration
- Low power optimization & deep sleep modes
- IoT connectivity (MQTT, HTTP, AWS IoT, Firebase, ThingsBoard)
- Data logging (SD card, Flash, LittleFS)
- Over-The-Air (OTA) updates
- FreeRTOS / Task management
- UART, I2C, SPI, ADC, PWM, Timers, Watchdog
- Custom communication protocols
### Deliverables:
- Clean, well-commented source code
- Complete project files (STM32CubeIDE)
- README with flashing instructions and usage
- Testing & debugging support
- Optional: Schematic review / PCB firmware optimization
I have extensive experience building real-world embedded systems and IoT devices. Fast communication, clean code, and reliable perform
