**Linux**: a USB device under `lsusb`. The device will have a VID of `0x1915` and a PID of `0x521f` -- the `0x` prefix will be omitted in the output of `lsusb`:
**macOS**: a usb device when executing `ioreg -p IOUSB -b -n "Open DFU Bootloader"`. The device will have a vendor ID (`"idVendor"`) of `6421` and a product ID (`"idProduct"`) of `21023`:
``` console
$ ioreg -p IOUSB -b -n "Open DFU Bootloader"
(...)
| +-o Open DFU Bootloader@14300000 <classAppleUSBDevice,id0x100005d5b,registered,matched,ac$
| {
| (...)
| "idProduct" = 21023
| (...)
| "USB Product Name" = "Open DFU Bootloader"
| (...)
| "USB Vendor Name" = "Nordic Semiconductor"
| "idVendor" = 6421
| (...)
| USB Serial Number" = "CA1781C8A1EE"
| (...)
| }
|
```
The device will show up in the `/dev` directory as `tty.usbmodem<USB Serial Number>`:
💬 These directions assume you are holding the board "horizontally" with components (switches, buttons and pins) facing up. In this position, rotate the board, so that its convex shaped short side faces right. You'll find one USB connector (J2) on the left edge, another USB connector (J3) on the bottom edge and 4 buttons on the bottom right corner.
**Linux**: a USB device under `lsusb`. The device will have a VID of `0x1366` and a PID of `0x10??` or `0x01??` (`?` is a hex digit) -- the `0x` prefix will be omitted in the output of `lsusb`:
The board has several switches to configure its behavior. The out of the box configuration is the one we want. If the above instructions didn't work for you, check the position of the following switches: