Multiple slaves (BMD 350 -custom board ) should be connected with one central module( NRF52832 - Holy IoT). Self test should be incorporated. eg. slave 1 , slave 2 , slave 3 ... slave 12 will be coded to the custom boards. Send command will find all slaves.
14 freelancers are bidding on average ₹39448 for this job
I have working experience with Nordic devices(nrf51, nrf52) and BLE. I have previously worked on a wearable (nrf52832), BLE Lamp(nrf52832), GPS tracker with BLE (nrf52810) and ESB Sniffer(nrf51822).