Hello,
the task looks interesting and good manageable, I would like to do it for you, currently working on a similar project. To design the hardware part I would need additional information crucial to optimal fulfill your requirements, please contact me to discuss following:
1) Cost factors pro location and pro sensor,
2) Size factors pro location and pro sensor,
3) Maximal and minimal distances between individual sensors by location, also lighting distances between LEDs and photosensors.
The offer implies:
- development of schematics, pcb layout,
- order a number of prototypes by a Chinese manufacturer,
- development of the software using an opensource embedded operating system,
- test the prototypes.
Not included are material costs and manufacturing costs by the extern vendor.
Best regards,
Viktor Gotwig,
Cologne, Germany.