# 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:** 9

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**Author:** ![Gilles](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/gilles/32/360_2.png) [@Gilles](https://mangoh.discourse.group/u/Gilles)\
**Post date:** [January 12, 2018, 8:02pm UTC](https://mangoh.discourse.group/t/cannot-get-heartbeat-app-to-work/874/9 "2018-01-12T20:02:24Z")

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> [@Kas.Lewis](#):
>
> echo 34 \> export

yes I’m receiving the same error  
root@swi-mdm9x15:/sys/class/gpio# echo 34 \> export  
sh: write error: Operation not permitted

and under Dev Studio I get a missing biding “gpioCf3Demo.gpioCf3PinComponent.le\_gpioPin34 → gpioService.le\_gpioPin34” which I had declared in adef. Must be related to the same error.

@dfrey I used your fix [Controlling WP\_GPIO\_1 / GPIO22 problem - #7 by nilsarve](http://mangoh.discourse.group/t/controlling-wp-gpio-1-gpio22-problem/984/7) , It didn’t t help. I am using legato 17.6 framework and also on target (mangoh red WP85).  
If it can help you can TeamViewer on my environment.

Cheers. Gilles

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