# EmonTX4 with extension board over USB?

**URL:** <https://community.openenergymonitor.org/t/emontx4-with-extension-board-over-usb/24495>\
**Category:** emonTx\
**Created:** [1 October 2023 08:45 UTC](https://community.openenergymonitor.org/t/emontx4-with-extension-board-over-usb/24495 "2023-10-01T08:45:40Z")\
**Posts on this page:** 1\
**Showing post:** 4

<div class="post-metadata">

**Author:** ![psykok](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/psykok/32/26198_2.png) [@psykok](https://community.openenergymonitor.org/u/psykok)\
**Post date:** [2 October 2023 05:54 UTC](https://community.openenergymonitor.org/t/emontx4-with-extension-board-over-usb/24495/4 "2023-10-02T05:54:42Z")

</div>

I managed to fixe the issue by following the solution describt in this topic:

> [@EmonTx4 not showing in Emoncms](https://community.openenergymonitor.org/t/emontx4-not-showing-in-emoncms/24236/16):
>
> Hello @lamixer replying here in reference to your support ticket, as I think the resolution of this might be useful for anyone else troubleshooting as well. Here’s my understanding of your setup so far: You have an emonTx4 with the 6CT extender running the EmonTx4 + EmonLibDB Continuous Monitoring Minimal Demo with rf firmware. You are trying to connect this directly via USB to a local VM running emoncms. The standard data format of this firmware is not compatible with data over seria…

---

_[View the full topic](https://community.openenergymonitor.org/t/emontx4-with-extension-board-over-usb/24495)._