# \#l868

**URL:** https://forums.digi.com/tag/l868/4033.md

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## [difference between modules](https://forums.digi.com/t/difference-between-modules/20424)

<div class="topic-metadata">

**Author:** [@ananalog](https://forums.digi.com/u/ananalog)\
**Replies:** 0\
**Last updated:** [April 19, 2019, 9:44am UTC](https://forums.digi.com/t/difference-between-modules/20424 "2019-04-19T09:44:25Z")

</div>

I have two modules (XB8-DMRS-002 rev G) on different PCB. pic. 1 - https://ibb.co/HnwvS2F pic. 2 - https://ibb.co/3CYGJkc first, on (pic. 1) is working fine. but one of them, on (pic. 2) did not work with default U. …