Unable to connect Holybro mosaic-H to PX4 after firmware upgrade (v4.15.0 -> v4.15.1) / Seeking v4.15.0 firmware

Hello PX4 community,

I am seeking urgent assistance regarding a connectivity issue with my Holybro H-RTK mosaic-H (Septentrio mosaic-H receiver) integrated with a PX4 autopilot system.

I recently upgraded the mosaic-H firmware from v4.15.0 to v4.15.1. Immediately after the upgrade, the mosaic-H module and PX4 stopped establishing a connection. I suspect a compatibility issue between this new firmware version and my current PX4 setup.

I have attempted to resolve this through the following steps, but have hit a dead end:

  • Contacted Holybro Support: They advised me to contact Septentrio directly for firmware-related inquiries.

  • Contacted Septentrio Support: I have sent multiple emails to their support channels to request the v4.15.0 firmware file for a downgrade, but I have received no response so far.

As this is currently blocking my operations, I am urgently looking for the v4.15.0 firmware file (.suf) to restore functionality.

I would appreciate it if anyone could provide:

  1. A copy of the mosaic-H v4.15.0 firmware, or information on where I can access specific legacy firmware versions.

  2. Any advice on how to get a responsive reply from Septentrio support, or alternative channels to escalate this issue.

  3. Any known configuration adjustments required for v4.15.1 to work with PX4 if a downgrade is not possible.

Any guidance or help would be greatly appreciated. Thank you!