Dear, Sir.
I am a senior Microcontroller developer and electronic engineer.
After reading your description, I am very interested in your project.
As you can see in my profile, I have developed the IoT and website , mobile app.
I can develop the PIC, Atmega, STM32, WiFi and BLE Arduino like ESP32, ESP8266, MKR1400 , SIM800/900/7100A, nRF51/52, many kinds of sensors.
Also as I am hardware developer, I can design the circuit and PCB using Altium Designer and EAGLE.
As I am a smart device manufacturer, I hope we can discuss the project in detail via a private chatting.
I am ready to start working immediately.
I will wait patiently for your response.
Best regards