# XCTU Cannot Connect to Xbee PRo S3B

**URL:** <https://forums.digi.com/t/xctu-cannot-connect-to-xbee-pro-s3b/3049>\
**Category:** XCTU\
**Created:** [December 12, 2012, 11:21pm UTC](https://forums.digi.com/t/xctu-cannot-connect-to-xbee-pro-s3b/3049 "2012-12-12T23:21:04Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![jsteele](https://avatars.discourse-cdn.com/v4/letter/j/bc8723/32.png) [@jsteele](https://forums.digi.com/u/jsteele)\
**Post date:** [December 12, 2012, 11:21pm UTC](https://forums.digi.com/t/xctu-cannot-connect-to-xbee-pro-s3b/3049/1 "2012-12-12T23:21:04Z")

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Hello Digi Members,

I just purcahsed a XBee Pro S3B and a Parallax USB Adapter, everything is nice and soldered into place 🙂

However my XCTU is unable to test/query the XBee Pro. I have use my breadboard wires to connect the VCC to the Reset Pin, which causes the slight flicker in lights (as XCTU suggests in the popup) however it still does not connect.

When I attempt to Read the X3B:

```auto
Failed to enter command mode 
Check connections and try again. 
Read parameters..Failed.

```

Current Settings are:

Baud: 9600  
Flow: None  
Data: 8  
Parity: None  
Stop Bits: 1

I have tried API on and API Off, to no change in messages.

* * *

Computer Settings:

Windows 8 Pro  
Default Found and Install Virtual Com Port Drivers  
XCTU - 5.2.7.5  
USB 2.0  
Parallax USB Drivers  
CDM 2.08.24 WHQL Certified Fidichip drivers

(I have run XCTU in windows 7 compatibility mode, and I always run as Admin.)

* * *

Any suggestions as to my next step in overcoming this initial hurdle?

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<div class="post-metadata">

**Author:** ![spastor](https://avatars.discourse-cdn.com/v4/letter/s/35a633/32.png) [@spastor](https://forums.digi.com/u/spastor)\
**Post date:** [December 13, 2012, 9:28am UTC](https://forums.digi.com/t/xctu-cannot-connect-to-xbee-pro-s3b/3049/2 "2012-12-13T09:28:35Z")

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Hello Jacob,

Try with 115200 bps (or other baudrates…) and let us know. Have you been able to access the device from other PC? Also, you can read the serial configuration remotely from other device in the same NetworkID. Best regards,

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<div class="post-metadata">

**Author:** ![jsteele](https://avatars.discourse-cdn.com/v4/letter/j/bc8723/32.png) [@jsteele](https://forums.digi.com/u/jsteele)\
**Post date:** [February 1, 2013, 11:34pm UTC](https://forums.digi.com/t/xctu-cannot-connect-to-xbee-pro-s3b/3049/3 "2013-02-01T23:34:23Z")

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I have tried other baud rates, I can get the +++ to return OK. The network works and devices will communicate, however they refuse to enter ATAP2 mode.

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<div class="post-metadata">

**Author:** ![spastor](https://avatars.discourse-cdn.com/v4/letter/s/35a633/32.png) [@spastor](https://forums.digi.com/u/spastor)\
**Post date:** [February 6, 2013, 9:16pm UTC](https://forums.digi.com/t/xctu-cannot-connect-to-xbee-pro-s3b/3049/4 "2013-02-06T21:16:37Z")

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Hello again Jacob,

Try to change the setting with X-CTU but from Modem Configuration tab. Were you able to set any other settings? Are you using the latest firmware version for your module?

Best regards,

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<div class="post-metadata">

**Author:** ![Rick\_Eis](https://avatars.discourse-cdn.com/v4/letter/r/3be4f8/32.png) [@Rick\_Eis](https://forums.digi.com/u/Rick_Eis)\
**Post date:** [May 9, 2013, 3:57am UTC](https://forums.digi.com/t/xctu-cannot-connect-to-xbee-pro-s3b/3049/5 "2013-05-09T03:57:00Z")

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Hi

Just wondering if you ever got your XBee Pro S3B and a Parallax USB Adapter to work with XCTU?

I have the same problem?

Thanks,

Rick