Hello, Dear,
Nice to meet you.
I've seriously read your post and I have understood what you need.
I am sure that I can be the best developer who can perfectly complete your project.
I am a senior Firmware development & PCB Designer with 4 years of experience.
I have rich experience in firmware development with MSP430,ESP32 ,STM,ARDUINO,RSPBERRY and PIC, PLC, FPGA, etc.
I also have rich experience MQTT,AWS, GPRS, GPS,GSM, SMS, IoT ,Zigbee,Wifi,Bluetooth,UART,SPI,I2C,ETH ,CAN....
This is my experience.
I can start work immediately and work full time.
I will do my best.