QtSerialPort, readyRead emitted multiple times

[Gaetano03]

Hello,

I have been reading people dealing with this issue, but still trying to get my head around it.

I am running the Qt example for reader async (no more than that, except for that I am not stopping it once the read is done as this is what I want in my final app). Despite I expect one message to be read from serial port, I get the same message printed out multiple times.

How can you deal with the problem of emitting readyread more than once?

THanks in advance for your help

[Christian Ehrlicher]

Are you sure the sender doesn't send data continuously?

[Gaetano03]

I am using Hercules to double check, and on it I am just receiving a single message as I would expect

[VRonin]

Have a look at void ChatClient::onReadyRead() of this wiki page. It uses QTcpSocket but the explanation is valid for QSerialPort too

[Kent-Dorfman]

readyread can trigger on any number of received characters, including (especially) an incomplete message. you are reading a stream. Just because you send a discrete message doesnt mean its received and parsed as a discrete message.