# \[FX100\]Problem: AT+IPR=0

**URL:** <https://forum.sierrawireless.com/t/fx100-problem-at-ipr-0/7578>\
**Category:** Legacy FX/FXT series\
**Created:** [November 20, 2014, 4:35pm UTC](https://forum.sierrawireless.com/t/fx100-problem-at-ipr-0/7578 "2014-11-20T16:35:54Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![francois44](https://avatars.discourse-cdn.com/v4/letter/f/34f0e0/32.png) [@francois44](https://forum.sierrawireless.com/u/francois44)\
**Post date:** [November 20, 2014, 4:35pm UTC](https://forum.sierrawireless.com/t/fx100-problem-at-ipr-0/7578/1 "2014-11-20T16:35:54Z")

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Hello,

I’m trying to send AT command from a microcontroller to the FX100 trought the uart 1, but i can’t manage to set well the uart parameter.

The reponse to AT&V is :

```auto
AT&V
Q:0 V:1 S0:000 S2:043 S3:013 S4:010 S5:008
+CR:0 +CRC:0 +CMEE:0 +CBST:0,0,1
+SPEAKER:2 &C:1 &D:2 %C:0
+IPR:0 +ICF:7,5 +IFC:2,2
```

When i send AT+IPR=115200 from the usb, here the result.

```auto
AT+IPR=115200
OK

AT&V
Q:0 V:1 S0:000 S2:043 S3:013 S4:010 S5:008
+CR:0 +CRC:0 +CMEE:0 +CBST:0,0,1
+SPEAKER:2 &C:1 &D:2 %C:0
+IPR:0 +ICF:7,5 +IFC:2,2

OK
```

It the same for +ICF and +IFC, i cannot manage to change the value.

Here is the result of AT+WMFM?

```auto
AT+WMFM?
+WMFM: 0,2,1,1
+WMFM: 0,2,2,0
+WMFM: 0,2,3,1
+WMFM: 1,2,4,0
+WMFM: 1,2,4,1

OK
```

Thanks for your answer,

Best regards

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<div class="post-metadata">

**Author:** ![MichaG](https://avatars.discourse-cdn.com/v4/letter/m/eada6e/32.png) [@MichaG](https://forum.sierrawireless.com/u/MichaG)\
**Post date:** [November 21, 2014, 12:36pm UTC](https://forum.sierrawireless.com/t/fx100-problem-at-ipr-0/7578/2 "2014-11-21T12:36:02Z")

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Hello

> [@francois44](#):
>
> When i send AT+IPR=115200 from the usb, here the result.

Do you mean you send the AT+IPR=xxx on USB uart and expect that UART1 data rate will be updated ?

Marc

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**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\
**Post date:** [November 21, 2014, 1:00pm UTC](https://forum.sierrawireless.com/t/fx100-problem-at-ipr-0/7578/3 "2014-11-21T13:00:56Z")

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I don’t have it to hand at the moment, but doesn’t the AT Commands Manual specifically state that these are ignored on the USB interface… ❓

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**Author:** ![sushil](https://avatars.discourse-cdn.com/v4/letter/s/e19adc/32.png) [@sushil](https://forum.sierrawireless.com/u/sushil)\
**Post date:** [November 24, 2014, 4:02am UTC](https://forum.sierrawireless.com/t/fx100-problem-at-ipr-0/7578/4 "2014-11-24T04:02:42Z")

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FX100/Q2698 doesn’t support UART1 autobaud.

AT+IPR=? on UART1 (with Firmware 7.53 beta release) returns  
+IPR: (),(300,600,1200,2400,4800,9600,19200,38400,57600,115200,230400,460800,921600). Note the absence of 0 in “(list of supported s)” parameter

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<div class="post-metadata">

**Author:** ![francois44](https://avatars.discourse-cdn.com/v4/letter/f/34f0e0/32.png) [@francois44](https://forum.sierrawireless.com/u/francois44)\
**Post date:** [November 24, 2014, 9:35am UTC](https://forum.sierrawireless.com/t/fx100-problem-at-ipr-0/7578/5 "2014-11-24T09:35:36Z")

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Thanks for all the reply.

I was making a mistake, but now it’s ok.

I’m able to receive and send data trought uart, and yes is very useful to well read the documentation…