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Senior III
August 13, 2026
Question

NUCLEO-WB55.USBDongle not advertizing

  • August 13, 2026
  • 1 reply
  • 21 views

I’m trying to migrate a project from the P NUCLEOWB55 MB1355 board to the P NUCLEOWB55 MB-1293 USB dongle.

I retargeted the board in MX & check the pinouts etc, all fine. Opened up the project in CubeIDE & built the project.

I then switched the board to BOOT0=0 (SW2) & plug it in & open CubePrg

First issue, its really hit & miss if Prg detects the board. Most often I get Port: No DFU detected but then sometimes I actually get Port: Port 1 and the board can be connected to. It really appears to be pot luck if Prg decides it can connect.

If I do manage to get it to connect, I update the FUS & stack, press the Start Stack button as outlined in a previous question, and continue to upload my *.elf file.

Second issue, I get nothing from the BLE, no advertising at all. This project works fine on the MB-1355 board by the way.

1 reply

Senior III
August 13, 2026

Update (as there doesn’t seem to be an option to edit the OP) Figured out the Prg USB issue switch BOOT0=1 (SW2 to the right) prior to insert then start Prg.

Still nothing from the dongle though. I added some code to turn on the blue LED but that doesn’t light up either. Prg assures me that the firmware was uploaded though…. puzzling…

The board is seen as “DFU in FS Mode” by Windows when BOOT0=1 but is completely ignored when BOOT0=0

 

/* Blue LED on inside main() */
RCC->AHB1ENR |= (1U<<0);
GPIOA->MODER |= (1U<<8);
GPIOA->MODER &=~(1U<<9);
GPIOA-ODR |= (1U<<4);