Ailunce HD1 GPS

Hello Ailunce Support,

I have two Ailunce HD1 GPS radios.

Radio 1:

* Firmware: V1.7.8-GPS
* CPS V3.05 works correctly.

Radio 2:

* Firmware: V2.3.4-GPS
* New device, never successfully programmed.
* Windows 11
* CH340 USB driver
* COM4

When I click “Read Radio”, the second radio displays “PC Read Data”, but the CPS immediately reports “Check Connection”. No progress bar appears.

I have tested the same programming cable and USB port with the first radio, and it works correctly.

Could you please confirm whether there is a known communication problem with firmware V2.3.4-GPS and CPS V3.05?

Is there a recommended firmware update or another solution?

Thank you.

Oliver Loibl