# Transpant Mode Tutorial XBee S2C only does loopback

**URL:** <https://forums.digi.com/t/transpant-mode-tutorial-xbee-s2c-only-does-loopback/18312>\
**Category:** XBee - DigiMesh\
**Tags:** grove-development-bo, transparent, digimesh\
**Created:** [May 1, 2017, 10:53am UTC](https://forums.digi.com/t/transpant-mode-tutorial-xbee-s2c-only-does-loopback/18312 "2017-05-01T10:53:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Steve\_Mayze](https://avatars.discourse-cdn.com/v4/letter/s/c77e96/32.png) [@Steve\_Mayze](https://forums.digi.com/u/Steve_Mayze)\
**Post date:** [May 1, 2017, 10:53am UTC](https://forums.digi.com/t/transpant-mode-tutorial-xbee-s2c-only-does-loopback/18312/1 "2017-05-01T10:53:18Z")

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Hi,

I am new to the XBee product and to wireless communication. To make a start, I obtained the Digi XBee S2C DigiMesh 2.4 Kit.

Working though the tutorial, I can not get the Transparent Mode to work as described in the tutorial. When I type a message in the console on XBEE\_A, the characters are echoed straight back. Nothing is received by XBEE\_B and there is no activity on the Rx/Tx LEDs on XBEE\_B.

The same occurs when attempting to send a message from XBEE\_B to XBEE\_A. I have verified that the jumper is NOT in the loopback position and verified many times that the ID and CH settings are the same.

Moving to API mode, a message frame can be successfully sent from XBEE\_A to XBEE\_B under API Mode 1.

I have also updated the firmware on both devices and the behaviour is the same. It seems there is a missing configuration for Transparent Mode that is not revealed in the tutorial instructions.

Any tips or hints would be greatly appreciated.

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<div class="post-metadata">

**Author:** ![mvut](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/mvut/32/31_2.png) [@mvut](https://forums.digi.com/u/mvut)\
**Post date:** [May 1, 2017, 11:16am UTC](https://forums.digi.com/t/transpant-mode-tutorial-xbee-s2c-only-does-loopback/18312/2 "2017-05-01T11:16:49Z")

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What are the DL/DH and SL/SH values for each radio?

It should be as follows:

Radio A  
DL - SL of Radio B  
DH - SH of radio B

Radio B  
DL - SL of radio A  
DH - SH of radio A

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<div class="post-metadata">

**Author:** ![Steve\_Mayze](https://avatars.discourse-cdn.com/v4/letter/s/c77e96/32.png) [@Steve\_Mayze](https://forums.digi.com/u/Steve_Mayze)\
**Post date:** [May 1, 2017, 12:32pm UTC](https://forums.digi.com/t/transpant-mode-tutorial-xbee-s2c-only-does-loopback/18312/3 "2017-05-01T12:32:21Z")

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Thanks. I realised my error not long after submitting the question! But then could not find the question to answer it myself.

I totally misread the instruction and had the Destination address for Radio A as Radio A! … Thereby forcing a local loopback.

Once I set these values correctly as you indicate above, it all worked as expected.

Thanks again.