SB_0000010 Mandatory Here4 bootloader update before further flight

Mandatory Safety Bulletins
22

Update. Finally resolved the pinout and loading the bootloader for Here4 from the STM32CubeProgrammer using ST-Link V3. Here are the pinouts that worked. (and these are consistent with Interface Specification but for (Digikey PN for housing SM06B-SURS-TF(LF)(SN)-ND).
Here is the pin ordering that worked for me from the 6pin JST-SUR header inside the Here4 to the ST-LINK v3 20pin header.
On the Here4 6pin-JST-SUR

  1. VTref (≈3.3 V)
  2. NRST
  3. SWO (not used for flashing)
  4. SWDIO
  5. SWCLK
  6. Ground
    On the ST-LINK v3 20pin block:
    VTref → Pin 1 (VTref)
    NRST → Pin 15 (nSET)
    SWDIO → Pin 7 (TMS/SWDIO)
    SWCLK → Pin 9 (TCK/SWCLK)
    GND → any even GND (4/6/8/10/12/14/16/18)
    SWO → Pin 13 (TDO/SWO)(optional) - Did not use.

(A similar setup probably will also work with ST-LINK v2 but without connecting the vref voltage pin. As best as I was able to understand from going through testing.)

With this I was finally able to erase and reload bootloader. After that there was blinking Blue LED heartbeat, and no problem being recognized in SLCAN in Missionplanner. Updated firmware there.
thanks

23

Hello Phillip. I have looked through the interface specs and only see the pinout for a SWD 6 pin connector, which the specs say is standard for all cube interfaces. It was not specify to the Here4. Here is a pic of the nearest connector pinout from that specification link you sent. Are the SWDIO and SWDCLK shown at pins 4 and 5 the same for the Here4. I am trying to connect to this with a 6 wire JST-SUR at one end and guessing at other end at the ST-LINK. Any resource to guide this would be much appreciated.

Screenshot_20251023_090045_Chrome
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Thank you.