Connection closed. Please open Connection first

[MarkResting]

Hi all and thanks a lot for this nice node to connect the comfoair system!!

Since a while i'm getting this error while usinge it in Node Red:

"comfoair [/dev/serial/by-id/usb-Prolific_Technology_Inc._USB-Serial_Controller_D-if00-port0] runCommand(getTemperatures): Connection closed. Please open Connection first."

I have no idea why this happen and how i can fix it.
Hope someone can help me on this.

If you need something else, please let me know!

[VincentSC]

This sounds like a Linux or hardware problem, not related to this library. Check dmesg after you plugged in the USB-device

[coolchip]

I've had a similar problem. Linux sets the USB-Serial Converter to standby.
https://unix.stackexchange.com/questions/91027/how-to-disable-usb-autosuspend-on-kernel-3-7-10-or-above

adding "usbcore.autosuspend=-1" to grub cmdline solves this for me.