Problem in reading port using QextSerialPort

[^NyAw^]

Hi,

Are you executing the write and read sequentially?
You have to wait some time until there is data on the port. You can use a timer that will call a slot where you have to read the data or use a QThread to perfrom read and write with a "msleep" that will wait some time.
The sleep time needed can be calculated with the baud rate.

[kuzulis]

2 cutie.monkey, use QSerialDevice :-)

this library work in asynchronous mode and support method: waitForReadyRead(msecs)

this library is alternative QextSerialPort

in this library is /examples/reader and /examples/writer ... for testing use it.

PS:
in the library may contain errors!
you can fix them myself! :-)

[cutie.monkey]

did you checked what port->open(QIODevice::ReadWrite); is returning?

yes, this returns true.. but what i encountered here is this, i removed the modem so nothing is connected in COM1 then try to run my app, it also returns true.

Are you executing the write and read sequentially?

No, i have a button to write command and a button to read its response. I have tried to wait for some seconds before trying get its response but nothing happens. Still the port->bytesAvailable() returns -1

2 cutie.monkey, use QSerialDevice :-)

ok, i'll try to use QSerialDevice . hope this one will help..

thanks

[^NyAw^]

Hi,

Are you sure that the modem is writing somthing? Try using a Serial sniffer to see what are you writing and what is the modem writing. Search "free serial port monitor" on your favorite web search engine.

[cutie.monkey]

hi, instead of QextSerialPort , im now using QSerialDevice which kuzulis suggessted(tnks to kuzulis), and its working.. cheers!