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LogScope Docs

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. For build instructions, see the generic Zephyr demo or the BLE HCI demo.

Tested Boards

Section titled “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
Section titled “J-Link Setup by Vendor”

Nordic DKs

Section titled “Nordic DKs”

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

STMicro Nucleo Boards

Section titled “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

Section titled “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

Section titled “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
Section titled “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. You may need to configure logscope.jlink.device to match your target chip.

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

Building the Demo

Section titled “Building the Demo”

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

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

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