Hi everyone,
I’m trying to control a BlinkyTape plugged into the USB-A connector of the Arduino Yún. The problem is there is no USB port port listed in /dev (it should be ttyACM0):
bsg loop3 mtd3 mtdblock2 sda1 ttyS2
bus loop4 mtd3ro mtdblock3 shm ttyS3
console loop5 mtd4 mtdblock4 tty ttyS4
full loop6 mtd4ro mtdblock5 ttyATH0 ttyS5
fuse loop7 mtd5 mtdblock6 ttyS0 ttyS6
input mem mtd5ro mtdblock7 ttyS1 ttyS7
kmsg mtd0 mtd6 null ttyS10 ttyS8
log mtd0ro mtd6ro ppp ttyS11 ttyS9
loop-control mtd1 mtd7 ptmx ttyS12 urandom
loop0 mtd1ro mtd7ro pts ttyS13 watchdog
loop1 mtd2 mtdblock0 random ttyS14 zero
loop2 mtd2ro mtdblock1 sda ttyS15
After a bit of research, I found the solution in this forum thread so I thought I’d share it for anyone who might be stuck with a similar issue. This should apply to any other device that needs to be controlled via serial over USB.
1. Activate the ttyACM0 port:
Connect via ssh to the Yún then run the following:
$ opkg update
$ opkg install kmod-usb-acm
There should now be a /dev/ttyACM0 port.
Use picocom to check that the port is working:
$ opkg install picocom
$ picocom -b 9600 /dev/ttyACM0
To exit picocom: <ctrl>a <ctrl>x
2. Install pyserial:
$ opkg update
$ opkg install pyserial
3. Install the scripts:
Copy the BlinkyTape python scripts on the µSD card (in directory /mnt/sda1/BlinkyTape_Python for example).
4. Run the scripts:
$ cd /mnt/sda1/BlinkyTape_Python
$ python binary_clock.py -p /dev/ttyACM0
Enjoy your blinking lights!
Raphaël
Edit: Clarified the steps and added explanation for Picocom (thanks ShapeShifter).
