Hello,

I am using SerialCom in raspberry pi.
Working of serialcom is OK.
Open port is OK.
Writing port is OK.
Reading port is OK.

I can get data from my sensor, I can send data to my sensor.

But,
When i try to close port,
I get xBussy warning always.

I have if state with start variable.

IF start TRUE THEN
com.open execute is OK ( port is opening )
com.write execute is OK ( i can send data to sensor )
com.read execute is OK ( i can get data from sensor )
ELSE
com.close execute is not OK ( i always get close bussy warning )

Could you please help me.

Some one can help me please.
When i unplug USB while raspberry pi is working.

USB port cannot close.

When i plug USB device again, ttyUSB0 can change ttyUSB1.
So, i have to restart raspberry pi.

I need help about it

Hi,

hm.. would recommend to close the com port before removing the USB Serial...
and /etc/udev/rules.d/serial-symlinks.rules you need to google for udev to prevent
USB is getting differnt Interface numbers.

BR
Edwin

Edwin Schwellinger hat geschrieben:
Hi,
hm.. would recommend to close the com port before removing the USB Serial...
and /etc/udev/rules.d/serial-symlinks.rules you need to google for udev to prevent
USB is getting differnt Interface numbers.
BR
Edwin

Dear Edwin,

I am trying to close the com port before removing the USB Serial.
But as i said, i am getting xBusy error.

I have already linked my usb devices.

I dont understand why comport is not close when i say "close" to the port.

you can see my serial links in attached files
What i need to do

I think no one have idea about it.