Event for disconnecting USB

Hi,
I’m using in my mikrotik hAP AC2 usb hub with 2 devices:

  • microSD card reader with 2GB sdcard for backups and logs
  • Huawei E1752 3G modem for SMS with sim included.

It is working correctly after start/reboot until some time. Suddenly my devices dissapear after some unspecific event, or time. I need to check it manually and then reset USB port. After that everything is working again for unspecified time.

My questions:
1, is there a way how to properly debug it for experts like you and report it to solve this issue ?
2, does RouterOS have events for USB, or something where I can attach command for reset USB when this issue occur ?

So far I have my scheduler to reset USB every 15 minutes.

/port print when this issue occur

[rch@mikrotik] > port print
Flags: I - inactive 
 #   DEVICE NAME 	CHANNELS 	USED-BY		BAUD-RATE
 0          usb2

/port print after USB reset

[rch@mikrotik] > port print
Flags: I - inactive 
 #   DEVICE NAME 	CHANNELS 	USED-BY		BAUD-RATE
 0	usb2		3		sms tool	9600

/system routerboard print

       routerboard: yes
        board-name: hAP ac^2
             model: RBD52G-5HacD2HnD
     serial-number: 9EF709C73784
     firmware-type: ipq4000L
  factory-firmware: 6.42.3
  current-firmware: 6.44.3
  upgrade-firmware: 6.46.4

Thx for any help.