initial commit 2

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diff --git a/addons/hw_drivers/iot_handlers/interfaces/USBInterface.py b/addons/hw_drivers/iot_handlers/interfaces/USBInterface.py
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+++ b/addons/hw_drivers/iot_handlers/interfaces/USBInterface.py
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+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from usb import core
+
+from odoo.addons.hw_drivers.interface import Interface
+
+
+class USBInterface(Interface):
+    connection_type = 'usb'
+
+    def get_devices(self):
+        """
+        USB devices are identified by a combination of their `idVendor` and
+        `idProduct`. We can't be sure this combination in unique per equipment.
+        To still allow connecting multiple similar equipments, we complete the
+        identifier by a counter. The drawbacks are we can't be sure the equipments
+        will get the same identifiers after a reboot or a disconnect/reconnect.
+        """
+        usb_devices = {}
+        devs = core.find(find_all=True)
+        cpt = 2
+        for dev in devs:
+            identifier = "usb_%04x:%04x" % (dev.idVendor, dev.idProduct)
+            if identifier in usb_devices:
+                identifier += '_%s' % cpt
+                cpt += 1
+            usb_devices[identifier] = dev
+        return usb_devices