Problem with QSerialport
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I have build a application with Qt and use QSerialport for communication with an arduino device. When I write a command to the Arduino I get a response back and try to read the data with a Signal-SLOT (readyread()) and in this slot I execute a serial->readall() call. Sometimes I get the whole message of 32 bytes but sometimes I get a part of the message and in the next message I have the other part of the message. That's ok, but.... I get the message again and sometimes 3 times.
example message complete in one call:
"Writefunction not implemented yet\r\n"
example message complete in two calls:
*"Writefunction not implement"
"ed yet\r\nWritefunction not implemented yet\r\n" *Can someone help me what is happening here? When I look with a terminal program I see the message only once.
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I have build a application with Qt and use QSerialport for communication with an arduino device. When I write a command to the Arduino I get a response back and try to read the data with a Signal-SLOT (readyread()) and in this slot I execute a serial->readall() call. Sometimes I get the whole message of 32 bytes but sometimes I get a part of the message and in the next message I have the other part of the message. That's ok, but.... I get the message again and sometimes 3 times.
example message complete in one call:
"Writefunction not implemented yet\r\n"
example message complete in two calls:
*"Writefunction not implement"
"ed yet\r\nWritefunction not implemented yet\r\n" *Can someone help me what is happening here? When I look with a terminal program I see the message only once.
Sometimes I get the whole message of 32 bytes but sometimes I get a part of the message and in the next message I have the other part of the message.
Well, thats how serial ports work. You need to define a protocol to come around this. Most often, line endings are used to indicate the end of a message.
That's ok, but.... I get the message again and sometimes 3 times.
example message complete in one call:
"Writefunction not implemented yet\r\n"
example message complete in two calls:
*"Writefunction not implement"
"ed yet\r\nWritefunction not implemented yet\r\n"That would be an error in your code, which you didnt show us so far.
Regards
