Hello, on OSX, the tty USB port are not /dev/ttyUSBx For the AEON stick it is : /dev/tty.SLAB_USBtoUART and /dev/cu.SLAB_USBtoUART In order to use it with domoticz, you have to create a symbolic link with /dev/cu.SLAB_USBtoUART. sudo ln -s /dev/cu.SLAB_USBtoUART /dev/ttyUSB0 unfortunately, you have ...