Imported from GitHub: ugokutennp/nrf52840-x3 · commit f7e9695 · license MIT

Description

3 connection DIY watchman dongle

README

nrf52840-x3

DIY Multiple Connection Watchman Dongle for SteamVR

Hardware

It includes data for PCBs made with Kicad7, Gerber data for manufacturing, 3D models of cases, and labels.
USB2.0 Hub chip with four downstream ports (SL2.1s) running three nrf52840 (MS88SF2) and one USB Type A connector.

BOM can be viewed here.Other data are below.

schematic, layout

Bootloader

The hex file in the Bootloader file is a build of Adafruit_nRF52_Bootloader. Using J-Link to write the bootloader via SWD, the uf2 firmware created with Watchman-uf2 can be written via USB.