Uart1 baudrate issue ec200u

Technical Subjects
1

have changed the uart1 baud rate as
AT+IPR=2100000;&W
OK
but now I am not able to access uart1, I have checked from usb

[2024-02-10 18:42:39:673_R:] AT+IPR?
[2024-02-10 18:42:39:673_R:] +IPR: 2100000

now I tried to change with USB but getting a response as

[2024-02-10 18:55:45:181_R:] AT+IPR=9600
[2024-02-10 18:55:45:181_R:] +CME ERROR: Operation not allowed

I tried resetting it,
[2024-02-10_19:10:06:183]OK
[2024-02-10_19:10:13:089]at+ipr=9600

[2024-02-10_19:10:13:089]+CME ERROR: Operation not allowed
[2024-02-10_19:10:19:589]at+ipr=9600:&w

[2024-02-10_19:10:19:589]+CME ERROR: Operation not allowed
[2024-02-10_19:10:23:480]at+ipr=9600;&w

[2024-02-10_19:10:23:480]+CME ERROR: Operation not allowed
[2024-02-10_19:10:39:092]AT+IPR?

[2024-02-10_19:10:39:092]+IPR: 2100000

[2024-02-10_19:10:39:092]OK
[2024-02-10_19:17:40:892]AT+QCFG=“nvrestore”,2

[2024-02-10_19:17:40:892]+CME ERROR: Operation not allowed
[2024-02-10_19:17:45:684]AT+QCFG=“nvrestore”,3

[2024-02-10_19:17:45:684]+CME ERROR: Operation not allowed

plz guide

2

Hi @mani_kumar ,

I think if you are set baud rate as fixed once we can’t it reset , you can ensured in manual.

If you want to save baud rate , you can use this command “AT&W0” instead “of AT+IPR=115200;&W”

So you can reset this baud rate by flash again modem boot firmware.

Do you have a modem boot firmware, Can you once after flash and check this.

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image907×661 72 KB

Thanks,