# Controlling DCD, DTR, DSR lines by legato application

**URL:** <https://forum.legato.io/t/controlling-dcd-dtr-dsr-lines-by-legato-application/3944>\
**Category:** Uncategorized\
**Created:** [December 13, 2018, 1:12pm UTC](https://forum.legato.io/t/controlling-dcd-dtr-dsr-lines-by-legato-application/3944 "2018-12-13T13:12:40Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![cchenry](https://avatars.discourse-cdn.com/v4/letter/c/a183cd/32.png) [@cchenry](https://forum.legato.io/u/cchenry)\
**Post date:** [April 3, 2019, 12:11am UTC](https://forum.legato.io/t/controlling-dcd-dtr-dsr-lines-by-legato-application/3944/13 "2019-04-03T00:11:08Z")

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Hi AE\_1,  
Try:  
DCD = GPIO24  
DTR = GPIO17  
DSR = GPIO36

BR,  
Chris

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