Dear Sir,
We are a small R & D company, based in Bulgaria, Europe.
We specialize in developing Embed systems based ST(STM32), Microchip (Atmel )(PICs,AVR,Atmel ARM) and TI (MSP430) MCPUs and peripheries.
For our mobile devices use ESP32 and nRF51/52xxx BLEs.
We realize projects with requirements similar to yours.
If we receive more information about your project, we will give you a real cost and time to implement your project.
We based in Europe, not customs problems for delivery models and samples for testing
Best
Valeri T