Specifications

NRF52840 on Tundra Firmware

• Data Transfer 1mbit
• Radio Bandwidth 1Mhz
• Using Nordic Proprietary Radio Protocol.
• Channels 0-80 (2400-2480mhz)
• Transmit Power +4dbm ~ -4dbm (varies on activity)
• USB Current draw 5v 0.012A +/- (active) (PCA10059 dongle)
• USB Full Speed
• USB HID 64bytes / 500 pps
• USB PID VID 28de 2102
• Datasheet https://infocenter.nordicsemi.com/pdf/nRF52840_PS_v1.8.pdf

Serial Number meaning

The numbers you see often for example 86CB101CCF-1YX are based on Device Address from the FICR register 0x10000000 0x0A4/0x0A8 (Factory information configuration) These numbers are unique per chip and burned inside the chip and cannot be changed. However these numbers are not exactly the same numbers (FICR vs steamvr). Afaik, these were replicated to match the older Watchman dongles with NRF24 inside. We break out the serial numbers into parts how it is generated..

[86] [CB 10] [1C CF]-[1][YX]

So first we have our device Address from the FICR register follows as a unsigned 32 bit int.

uint32_t DEVICEADDR[0] = 0xcb101e05;

uint32_t DEVICEADDR[1] = 0x81c29cb6;

to create [86] we have this formula.

uVar1 = (DEVICEADDR[0] >> 0x10 | (DEVICEADDR[1] & 0xffff | 0xc000) << 0x10) & 0x00CFFFFF;