Supported Boards

LogScope works with any board that supports SEGGER RTT (J-Link) or Serial UART. The demo firmware has been tested on the following boards.

Tested Boards

Board	Vendor	Zephyr Target	Buttons	J-Link	Price
nRF52840 DK	Nordic	nrf52840dk/nrf52840	4	Built-in	~$49
nRF54L15 DK	Nordic	nrf54l15dk/nrf54l15/cpuapp	4	Built-in	~$49
nRF5340 DK	Nordic	nrf5340dk/nrf5340/cpuapp	4	Built-in	~$49
xG24 Explorer Kit	Silicon Labs	xg24_ek2703a	2	Reflash required	~$40
NUCLEO-H753ZI	STMicro	nucleo_h753zi	1	Reflash required	~$28
NUCLEO-F401RE	STMicro	nucleo_f401re	1	Reflash required	~$14
FRDM-MCXN947	NXP	frdm_mcxn947/mcxn947/cpu0	2	Reflash required	~$26

J-Link Setup by Vendor

Nordic DKs

No setup needed. All Nordic DKs have a built-in J-Link debug probe. RTT works immediately.

STMicro Nucleo Boards

Nucleo boards ship with ST-Link, which needs to be reflashed to J-Link firmware:

1. Download the free STLinkReflash utility from SEGGER
2. Run the utility and select “Upgrade to J-Link”
3. Done. The conversion is reversible if you need ST-Link back.

Silicon Labs xG24

The xG24 debug probe needs J-Link firmware:

1. Open Simplicity Studio
2. Go to the debug probe configuration
3. Flash the J-Link firmware

NXP FRDM Boards

FRDM boards ship with MCU-Link/OpenSDA:

1. Download the J-Link firmware for your board from SEGGER’s OpenSDA page
2. Put the board in bootloader mode (hold reset while plugging in USB)
3. Drag and drop the firmware file to the bootloader drive

Using an External J-Link Probe

If your board doesn’t have a built-in J-Link (or the built-in probe can’t be reflashed), you can use an external J-Link probe connected to the board’s SWD/JTAG header.

Any SEGGER J-Link model works. The J-Link EDU Mini (~$20) is the most affordable option for hobbyists.

Building the Demo

For boards with built-in J-Link (or after reflashing):

west build -b <target> samples/zephyr-generic-demo -p
west flash

Replace <target> with the Zephyr board target from the table above.