mknod /dev/ttyACM0 c 166 0
mknod /dev/ttyACM1 c 166 1 for ttyACM1, and so on...
Instead use:
mknod /dev/ttyUSB0 c 188 0
mknod /dev/ttyUSB1 c 188 1
for non-acm usb devices.
For bluetooth device first make sure to bind them (man rfcomm).
Then look the list of binded devices just typing rfcomm, it will show an output similar to this:
rfcomm0: 00:11:22:33:44:55 channel 8 clean
If you still can't see /dev/rfcomm0, then do
mknod /dev/rfcomm0 c 216 0