qserialport data missing while reading from port but returns 9 bytes available

Question

While reading from the port using the function readdata of qextserialport class data loss happens

For example serialobj->bytesavailable returns 9 bytes but while serialobj->readData returns only two characters from pic microcontroller

Answer 1

Judging by the comments, you're trying to print out the received bytes to the console. Obviously, some of the bytes you attempt to print out are not printable and produce no visual output.

Perhaps you want to see the values of the bytes in hexadecimal base:

qDebug() << serialObj->readData().toHex();