# Homey Energy Dongle ⚡️ - Megathread

**URL:** <https://community.homey.app/t/homey-energy-dongle-megathread/133816>\
**Category:** Energy\
**Created:** [March 31, 2025, 9:09pm UTC](https://community.homey.app/t/homey-energy-dongle-megathread/133816 "2025-03-31T21:09:41Z")\
**Posts on this page:** 1\
**Showing post:** 230

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**Author:** ![Christian\_DS](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/christian_ds/32/128786_2.png) [@Christian\_DS](https://community.homey.app/u/Christian_DS)\
**Post date:** [April 18, 2025, 12:08pm UTC](https://community.homey.app/t/homey-energy-dongle-megathread/133816/230 "2025-04-18T12:08:13Z")

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Hi everyone 👋  
I connected the **Homey Energy Dongle** to a **Landis+Gyr E450 smart meter** in the **Netz Burgenland** region (Austria).  
Although the P1 port is activated and the encryption key is correct, I receive the error: _“The Homey Energy Dongle could not connect to your smart meter.”_  
The same meter works flawlessly with the **HomeWizard P1 Dongle** , which suggests that the E450 sends a **non-standard or modified P1 signal**.  
Can you confirm if the Homey Dongle only supports strict **DSMR 4/5 protocol** , and thus cannot read data from the E450 in this configuration? Is there a way to fix it?  
Thanks for your support 👍

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