# Spark Core didn't go to sleep

**URL:** https://community.particle.io/t/spark-core-didnt-go-to-sleep/14641
**Category:** Troubleshooting
**Created:** [August 23, 2015, 4:03am UTC](https://community.particle.io/t/spark-core-didnt-go-to-sleep/14641 "2015-08-23T04:03:33Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![ScruffR](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/scruffr/32/6952_2.png) [@ScruffR](https://community.particle.io/u/ScruffR)
#### Post date: [August 23, 2015, 7:57am UTC](https://community.particle.io/t/spark-core-didnt-go-to-sleep/14641/2 "2015-08-23T07:57:26Z")

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Have you looked at these?  
[Pin pullup not waking cores from sleep (Waking by itself)](http://community.particle.io/t/pin-pullup-not-waking-cores-from-sleep-waking-by-itself/9547)  
[Having trouble using Sleep() with wakeUpPin](http://community.particle.io/t/having-trouble-using-sleep-with-wakeuppin/10691)  
[[SOLVED] Not able to put my core in stop mode (it just wakes up)](http://community.particle.io/t/solved-not-able-to-put-my-core-in-stop-mode-it-just-wakes-up/9417)

Can you show your code and give some info about the hardware setup?

With your rather _minimalistic_ error description I’d guess on a floating wake pin.

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