Hello,
I'm a new freelancer.
I have designed hardware and firmware of audio video doorbell, video recording and home automation systems with GUI and embedded circuit, on linux and RTOS (like Keil RTX, ti-rtos, freertos).
I have used many interfaces Spi, uart, ethernet, usb, i2S, i2C, and many protocols like TCP/IP, UDP, MQTT, modebus, lin, can, ...etc..
If 20 years of experience on hardware firmware and software design is something valuable for you, I'm here to accomplish your project.