Hello,
My name is Andrei, i am a Romanian IOT Developer with a lot of experience in IOT projects and automatics .
I have read your requeirments, is a nice project , i can help you with the development platform but we need to disuse a little , because i have several solutions for you .
the project is duable in 1-2 days .
I can work with all types of Microcontroles programming in C , C++ , Mikro C , CCS C , Atmel Studio , Arduino , gcc .
Creating Schematics and PCB in Kicad , Eagle , EasyEDA and Proteus (+simulation).
I have an workshop full of parts and the infrastructure to build PCB and test the solution end to end using special tools (Spectrum analyzers , oscilloscope , logic analyzers )
Derivable on the project :
Schematic design
PCB Design
Gerber files for manufacturing
As an additional service i can make you a full working prototype and ship to you.
Regards,
Andrei