The Pogoplug doesn't automatically make dev entires - this is a pain in the ass. Google around how to "mknod" manually for a serial device. Warning: it will suck trying to find an answer.

Dontcha just love the streamlined firmware on the plugs? Full of win.

I am almost getting the USB device recognised.
I have compiled up various usb modules and loaded them into the kernel with insmod.

I can see my arduino board under /sys/bus/usb/devices/1-1.3 and if I "cat manufacturer" and product I can see that it is recognised. The dev in that directory says that it is on device 189:16 and not the 188:16 which would be usb serial.

I can now read messages from my Arduino. I had to compile the cdc_acm module and install that.

dmesg then said:-

[630116.930000] usb 1-1.3: new full speed USB device using ehci_marvell and address 18
[630117.030000] usb 1-1.3: configuration #1 chosen from 1 choice
[630117.030000] cdc_acm 1-1.3:1.0: ttyACM0: USB ACM device

I can see in /proc/devices that ACM is 166

so I ran:-
mknod /dev/test c 166 0

and then

cat < /dev/test

and it displayed the temperature readings coming from my arduino.

Ditto on the instructions, pretty please.

I picked up a pogoplug pro to serve as a data repo for stuff coming out of an arduino project. I can see the arduino on usb 189.# so the story is hanging together. Please forgive the ignorant question -- I haven't hacked around inside the kernel much since 2.2 days -- shouldn't I be able to configure adding cdc_acm and build the kernel from downloaded straight from pogo? Then can I just drop the module into the right spot under /sys and do an insmod cdc_acm followed by a mknod? I'm trying to avoid major surgery on the pogo unless I really have to. After a couple hours of having the pogo, it seems to be a cute little device.

Hi USBHacker,
I have a device with FTDI chip and I tried to copy and compile ftdi_sio.tar with make cmd but it failed and I found ftdi_sio.o and try to insmod but the system says the ftdi_sio.o file invalid. Can you share your story about cdc_acm module compilation? and how did you install it?

If I install Plugapps with the external usb stick I got linux above 2.6.31 so the FTDI driver is already there and it does work. But Pogoplug is 2.6.22 so the driver must be installed first.
Thanks!
zhaozh