Cannot connect serial on port: /dev/ttyACM0

[magdesign]

I am trying since hours to upgrade my LasersaurApp v.14.11b to DriveboardApp 17.04 beta. After flashing the new firmware to my Arduino Mega 2560 (tried with: firmware.driveboard1403.hex and firmware.driveboardusb.hex and also with the original on the board). I start the driveboardapp with: sudo python driveboardapp/backend/app.py

Setting the right serial port with: http://127.0.0.1:4444/config/serial_port//dev/ttyACM0

But I always get following error message:

ERROR: Cannot get 'hello' from controller
ERROR: Cannot connect serial on port: /dev/ttyACM0
WARN: Cannot connect to configured serial port.
INFO: Trying to find port.
ERROR: No controller found.

Also checked: /home/<myuser>/.driveboardapp/config.json It looks like this:

{
    "network_port": 4444, 
    "feedrate": 2000, 
    "raster_leadin": 20, 
    "users": {
        "laser": "laser"
    }, 
    "seekrate": 6000, 
    "grid_mm": 100, 
    "firmware": "driveboardusb", 
    "serial_port": "/dev/ttyACM0", 
    "intensity": 0, 
    "max_jobs_in_list": 20, 
    "fill_leadin": 10, 
    "kerf": 0.3, 
    "workspace": [
        1220, 
        610, 
        0
    ], 
    "network_host": "", 
    "pxsize": 0.4
}

Is there something to change, e.g. "firmware": "driveboardusb" ? I tried on OSX, Ubuntu, and Windows. Any help very appreciated.

[stefanix]

Try an Arduino Uno. I doubt the firmware is compatible with the Mega.

[stefanix]

Happy to help when running on the correct hardware.