I have already designed such devices for vehicle tracking system and is size of a wrist watch if you wanna check my ability to design this i can attach the images of the device , wait for your resp
Relevant Skills and Experience
leading a team of professional , PCB designer, embedded developer, IOT professionals,
Proposed Milestones
$1250 AUD - Complete PCB design and firmware, 2 finished working products, and all design files
I will need web point from your side that,s it , i hope this will best bid for you.