Relay Controller Module
- class mtf.network_port.relay_controller.RelayController
- USB_CFG_VENDOR_ID
 - USB_CFG_DEVICE_ID
 - USB_RELAY_VENDOR_NAME
 - USB_RELAY_NAME_PREF
 - USB_RELAY_ID_STR_LEN
 - filter
 - hid_device
 - device
 - report
 - last_row_status
 - get_Hid_USBRelay()
 - open_device()
 - close_device()
 - refresh()
 - get_report()
 - read_status_row()
 - write_row_data(buffer: list)
 - on_all()
 - off_all()
 - on_relay(relay_number)
 - off_relay(relay_number)
 - read_relay_status(relay_number)
 - is_relay_on(relay_number)