Embedded IoT Firmware Development

I will provide complete hardware schematics and expect production-ready C/C++ firmware that brings the board to life. The microcontroller must talk cleanly to all attached sensors and peripherals over I2C, SPI, and UART, expose both Wi-Fi and Bluetooth Low Energy, and push data to the cloud... (Budget: $250 - $750 USD, Jobs: C Programming, C++ Programming, Electronics, Embedded Systems, Firmware Development, I2C, Microcontroller, Wireless)