# Instrument Interface, readUntil() only single Char delimiters?

**URL:** <https://forum.inductiveautomation.com/t/instrument-interface-readuntil-only-single-char-delimiters/16936>\
**Category:** Ignition\
**Created:** [February 9, 2018, 2:20pm UTC](https://forum.inductiveautomation.com/t/instrument-interface-readuntil-only-single-char-delimiters/16936 "2018-02-09T14:20:45Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![dano38291](https://avatars.discourse-cdn.com/v4/letter/d/9d8465/32.png) [@dano38291](https://forum.inductiveautomation.com/u/dano38291)\
**Post date:** [February 9, 2018, 2:20pm UTC](https://forum.inductiveautomation.com/t/instrument-interface-readuntil-only-single-char-delimiters/16936/1 "2018-02-09T14:20:45Z")

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Hello,  
So I have installed the Instrument Interface and the Serial Modules. I watched all the SepaSoft videos and browsed through a good number of posts. What I am looking for is a confirmation that the readUntil() of the Serial Controller only takes single Char. Like I can’t use ‘/r/n’ as my delimiter?  
[https://help.sepasoft.com/docs/display/MHD/Serial+Controller](https://help.sepasoft.com/docs/display/MHD/Serial+Controller)  
My work around is to just use ‘/r’ as my delimiter and then clear the buffer to kick out the /n cause if I don’t I get the /n on the next read.

Also I have attached my sample project for any other new people getting into the Instrument Interface. [SerialTest (2018-02-09).proj](https://us1.discourse-cdn.com/inductiveautomation/original/2X/d/d2883fb3a9953de52cf307d7376d5e0a4aba08bf.proj) (27.7 KB)