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Why does QML SerialPort readAll() return multiple lines of data?

↗ Original Qt Forum discussion
QM • Qt Forum member • September 11, 2026 • 1 answers

A Qt Forum user was receiving several lines of serial data together and wanted to understand how to read a smaller amount or a single line.

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Dheerendra V Purohit
September 11, 2026 • Independent answer
✓ Accepted
Dheerendra pointed out that readAll() reads all currently available data. He suggested trying read() or readLine() with an appropriate maximum size when the application needs more controlled reads.
cpp
device->read(maxSize);device->readLine(maxSize);
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