EC25 - Changed bitrate with AT+IPR , now can't revert it back to standard

IoT Modules LTE Standard Module
1

Hi.
I have a EC25-E module here as mini-PCIe module, access via

  • either a Sixfab LTE miniPCIe converter (Serial and USB)
  • or a USB-miniPCIe adapter on a Windows PC

Working fine:

  • Windows with Qnavigator and installed drivers (USB adapter) → 4x USB-COMports
  • Linux with minicom also to Serial and USB via Sixfab module → 1x Serial normal and 4x USB-COMports

My question:
I have modified the Serial speed via AT+IPR=… to test speeds up to 4000000.
Command run and setting was stored with AT&W.
I can access the module via USB connection and check the settings : AT+IPR? → returns 4000000
→ I now lost under Linux the serial ttyS0 connection due to this modification ←
BUT: I can not revert it back to 115200 speed :frowning: AT+IPR=115200 via USB COMport returns OK but it is NOT saved…

Any ideas to change it back to 115200?

Thanks.

Kind regards,

Martin

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3

Hi.
Thanks for your reply. As I wrote above, I already tested this approach, still no way of changing the settings back. Please note, that I can only can connect to the device by using a USB connector (and a ‘base’ board holding the mini-PCIe BG module).
One thing I do not understand: what does the Note 3. in the chapter 3.5 AT+IPR mean?
3. In multiplex mode, the baud rate cannot be changed by the Write Command AT+IPR=; and the setting is invalid and cannot be stored even if AT&W is executed after the Write Command
Kind regards,

Martin