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I will develop esp32 or stm32 ble firmware for your iot device
Embedded C and Linux Firmware Engineer with 20 Years in Automotive
I am an embedded software engineer in Japan with 20 years of experience building firmware for automotive and industrial products, including airbag ECUs, EV interface boxes, construction machinery and ...
About this Gig
Need BLE firmware for your ESP32 or STM32 IoT device?
I build reliable Bluetooth Low Energy firmware that connects your sensors to a phone app or gateway. I am an embedded C engineer from Japan with 20 years of experience shipping automotive and industrial firmware.
What I can build:
- Custom GATT services and characteristics
- Sensor drivers (I2C / SPI / UART) with BLE data streaming
- Low-power operation for battery devices
- OTA firmware updates
- Porting an Arduino prototype to production-quality code (ESP-IDF or STM32 HAL)
What you get:
- Clean, commented C source code
- Build instructions
- Test steps using a BLE app such as nRF Connect
- A design note (Standard and Premium)
How it works:
1. Tell me your board, your sensors and what the phone should see
2. I confirm the scope and price in writing before you order
3. All communication is in written English, so every requirement stays documented
Platform:
ESP32
FAQ
Do you test on real hardware?
Yes, on my own ESP32 / STM32 boards. If your custom board is needed, I send test builds and check your logs.
Can you also build the phone app?
No. I focus on the firmware and give you a clear BLE spec your app developer can use.
Will you sign an NDA?
Yes.
Can you port my Arduino prototype?
Yes. I rewrite it in ESP-IDF or STM32 HAL so it is stable and maintainable, and keep the behavior you already tested.
