Raspberry Pi Debug Probe

The Raspberry Pi Debug Probe is an inexpensive, all-in-one USB to
serial debug and UART bridge. It provides the necessary hardware and
cabling to support “plug and play” debugging of Raspberry Pi Pico and
other microcontroller- and microprocessor-
based platforms.

The Raspberry Pi Debug Probe provides both a processor serial debug
interface (by default this is the ARM Serial Wire Debug interface) and
an industry-standard UART interface. Both interfaces use a 3-pin
debug connector, as specified in the Raspberry Pi 3-pin debug
connector specification.

The Raspberry Pi Debug Probe is provided as a kit, containing the
probe hardware in a plastic case, and a set of cables: a USB cable, and
three different types of debug cable to cover the vast majority of use
cases.
While it has been designed primarily for use with Raspberry Pi debug
targets, the Debug Probe provides standard CMSIS-DAP debug and
UART interfaces over USB; it can therefore be used to debug other
targets, or simply as a cost-effective USB-to-
UART cable.
The Raspberry Pi Debug Probe is based on the Raspberry Pi Pico
hardware design and runs the open-source Raspberry Pi Picoprobe
software.

Updating the
firmware is accomplished in the same way as on a Raspberry Pi Pico,
so it is straightforward to keep the unit up to date with the latest
Picoprobe firmware, or to use a custom firmware.