Вот так?
root@wirenboard-AYVDYJBZ:~# mosquitto_sub -t '/devices/0x54ef441000ee5ba5/controls/action' -v
/devices/0x54ef441000ee5ba5/controls/action single_right
/devices/0x54ef441000ee5ba5/controls/action single_left
/devices/0x54ef441000ee5ba5/controls/action (null)
/devices/0x54ef441000ee5ba5/controls/action single_left
/devices/0x54ef441000ee5ba5/controls/action single_left
/devices/0x54ef441000ee5ba5/controls/action single_right
/devices/0x54ef441000ee5ba5/controls/action (null)
/devices/0x54ef441000ee5ba5/controls/action single_right
/devices/0x54ef441000ee5ba5/controls/action single_right
/devices/0x54ef441000ee5ba5/controls/action single_right
/devices/0x54ef441000ee5ba5/controls/action single_left
/devices/0x54ef441000ee5ba5/controls/action (null)
/devices/0x54ef441000ee5ba5/controls/action single_left
/devices/0x54ef441000ee5ba5/controls/action single_left
/devices/0x54ef441000ee5ba5/controls/action single_left
/devices/0x54ef441000ee5ba5/controls/action single_right
/devices/0x54ef441000ee5ba5/controls/action (null)
/devices/0x54ef441000ee5ba5/controls/action single_right
/devices/0x54ef441000ee5ba5/controls/action single_right
/devices/0x54ef441000ee5ba5/controls/action single_right
/devices/0x54ef441000ee5ba5/controls/action single_left
/devices/0x54ef441000ee5ba5/controls/action (null)
/devices/0x54ef441000ee5ba5/controls/action single_left
/devices/0x54ef441000ee5ba5/controls/action single_left
/devices/0x54ef441000ee5ba5/controls/action single_left