binary data communication through SerialPort

Sen Li

Do you have the correct baud rate, data and stop bits and otzher flags?

Yes, I am sure those are correct.

The dongle is controlled by command packets. And any wrong command packets should active a error response, which I never received; the serialRead() was never called.

mrjj

well I would try with
http://realterm.sourceforge.net/ then and see if it even works at all.

mrdebug

Have you tried the QThread approach instead of events?
Please, download this
http://kde-apps.org/content/show.php/QtComPort?content=142378
and have a look at the file qthcomport.cpp
I know everybody don't like the QThread approach instead of events but in a difficoult situation I think the QThread approach is better. You can manage timemouts an polling.
Have you got the dongle serial protocol?
Every serial device has a protocol. For example if you send at a modem at&v you will have the current modem configuration.
Often the serial devices have a command to know the firmware version. This is the first command to implement. Normally there are a byte to begin, end and control.
Have you found the serial protocol in the sdk?

SGaist

Hi,

Maybe a silly question but are you sure this dongle can be used like a serial port ? The description says BLE to USB bridge.

mrdebug

I think the same thing. I normally use ble with bluez ( the Debian bluetooth stack) and not the usb dongle directly. Maybe his usb dongle has the bluetooth stack embedded.

Sen Li

Hi @mrjj @mrdebug ,

Thank you guys for helping me.

I finally got a response after sending a command packet to the dongle through a serial port.

So happy about it!

mrjj

@Sen-Li
congratulation!

SGaist

Nice, what was the problem ?

On a side note, you don't need to modify your thread title anymore, just use the "Topic Tool" button to mark the thread as solved :)

Sen Li

That CY5670 BLE dongle discards any commands without a header, which means I need to add a header to my command packet to talk to the dongle, otherwise nothing will happen.

SGaist

Thanks for sharing your findings :)