# Cannot get Heartbeat app to work

**URL:** <https://mangoh.discourse.group/t/cannot-get-heartbeat-app-to-work/874>\
**Category:** mangOH Red\
**Created:** [November 6, 2017, 7:24pm UTC](https://mangoh.discourse.group/t/cannot-get-heartbeat-app-to-work/874 "2017-11-06T19:24:49Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![dfrey](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/dfrey/32/303_2.png) [@dfrey](https://mangoh.discourse.group/u/dfrey)\
**Post date:** [November 7, 2017, 10:21pm UTC](https://mangoh.discourse.group/t/cannot-get-heartbeat-app-to-work/874/2 "2017-11-07T22:21:12Z")

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Please take a look at this post and make sure that the relevant GPIOs are owned by Linux.

> [@Problem controlling Pin 15 on Raspberry Pi Connector](http://mangoh.discourse.group/t/problem-controlling-pin-15-on-raspberry-pi-connector/861/2):
>
> On the target: root@swi-mdm9x14~# microcom -E /dev/ttyAT at+wiocfg? +WIOCFG: 2,16,0,0,1,0,0 +WIOCFG: 6,16,0,0,1,0,0 +WIOCFG: 7,16,0,0,1,0,0 +WIOCFG: 8,16,0,0,1,0,0 +WIOCFG: 13,16,0,0,1,0,0 +WIOCFG: 21,16,0,0,1,0,0 +WIOCFG: 22,16,0,0,1,0,0 +WIOCFG: 23,16,0,0,1,0,0 +WIOCFG: 24,16,0,0,1,0,0 +WIOCFG: 25,16,0,0,1,0,0 +WIOCFG: 28,0,0,0,1,0,0 +WIOCFG: 29,0,0,0,1,0,0 +WIOCFG: 30,0,0,0,1,0,0 +WIOCFG: 31,0,0,0,1,0,0 +WIOCFG: 32,16,0,0,1,0,0 +WIOCFG: 33,16,0,0,1,0,0 +WIOCFG: 34,0,0,0,1,0,0 +WIOCFG: 35,0,0…

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_[View the full topic](https://mangoh.discourse.group/t/cannot-get-heartbeat-app-to-work/874)._