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Editorial Team
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Asked: 2026-05-13T07:14:23+00:00

I’m working with a GPS module that is transferring data to my mac over

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I’m working with a GPS module that is transferring data to my mac over a serial RS232-to-USB interface. I’ve written a objC program that takes the raw data and converts it into meaningful information.

Using a program called goSerial, I’m able to log all incoming data into a text file. I have been able to make my program read the text file and process data line by line.

I would like this procedure to happen in real time i.e. as soon as the data is received, it gets logged into the text file and my program reads it. The first part of this happens automatically that is the text file is being constantly appended (when not open). Is it possible to monitor a text file for appended data and only read new lines? Also, will doing this affect the ability of new incoming data to be saved?

Thanks!!!

(Also, if anyone knows how I may send serial data directly to Xcode, please let me know!)

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1 Answer

  1. Editorial Team

    I’m not sure how the serial-to-USB affects things but traditionally, unix accesses serial devices using the Device-File Mechanism which treats the input from the device as a file to be read. You would use NSFileHandle to read the file from Cocoa/Foundation. You probably want to checkout the IORegistryExplorer app to see how your device shows up.

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