# MQTT Hub switching a light On every time Homey Updates

**URL:** <https://community.homey.app/t/mqtt-hub-switching-a-light-on-every-time-homey-updates/90486>\
**Category:** Questions & Help\
**Tags:** homey-pro\
**Created:** [September 29, 2023, 5:07am UTC](https://community.homey.app/t/mqtt-hub-switching-a-light-on-every-time-homey-updates/90486 "2023-09-29T05:07:12Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Benjamin\_Potet](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/benjamin_potet/32/79318_2.png) [@Benjamin\_Potet](https://community.homey.app/u/Benjamin_Potet)\
**Post date:** [September 29, 2023, 5:07am UTC](https://community.homey.app/t/mqtt-hub-switching-a-light-on-every-time-homey-updates/90486/1 "2023-09-29T05:07:12Z")

</div>

Hello,

On my Homey Pro 2023, for the second time, I noticed that when Homey updates and restarts during the night, MQTT Hub automatically starts one of my light Bulbs (Ikea)?!?!?

In the morning find the light “On”, and I can see in History: “Activated by Benjamin via MQTT Hub”.

When I manually restart MQTT Hub, nothing happens; it’s only when Homey updates.  
I’m not sure whether it’s a misleading error message or there is an action MQTT Hub does in that case.

Did you notice something on your side?

Thanks

---

<div class="post-metadata">

**Author:** ![Peter\_Kawa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peter_kawa/32/173848_2.png) [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)\
**Post date:** [September 29, 2023, 1:59pm UTC](https://community.homey.app/t/mqtt-hub-switching-a-light-on-every-time-homey-updates/90486/2 "2023-09-29T13:59:59Z")

</div>

Offtopic: My advice is to turn off all those unannounced updates, no surprises anymore and you decide what and when you update.

Ontopic: with zigbee2mqtt I found some lights turning on when I restart the HA add-on.  
I _ **do want** _ lights to turn on after a power outage, but probably a reset of Homey generates a similar signal, not sure why it happens while the power to the lights is up all the time.

For most zigbee lights (and other devices) there’s a setting _what to do after power outage_  
You can decide to set it to “Off”

 ![Screenshot_20230929-155902_Home Assistant](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/e/7/e7486eeba44e63c021ce2452d100ffca8dca52f3.jpeg)

My main concern to the “Off” setting is, in case of zigbee issues, you **never can turn the light on** by switching the power off-on…

---

<div class="post-metadata">

**Author:** ![Benjamin\_Potet](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/benjamin_potet/32/79318_2.png) [@Benjamin\_Potet](https://community.homey.app/u/Benjamin_Potet)\
**Post date:** [October 1, 2023, 10:14am UTC](https://community.homey.app/t/mqtt-hub-switching-a-light-on-every-time-homey-updates/90486/3 "2023-10-01T10:14:21Z")

</div>

Hi @Peter_Kawa , thanks for your tips, I will give it a try

Kind regards,

Ben