code: def do_IAmRequest(self, apdu):
          
          if _debug: WhoIsIAmServices._debug("do_IAmRequest %r", apdu)
  
          # check for required parameters
          if apdu.iAmDeviceIdentifier is None:
              raise MissingRequiredParameter("iAmDeviceIdentifier required")
          if apdu.maxAPDULengthAccepted is None:
              raise MissingRequiredParameter("maxAPDULengthAccepted required")
          if apdu.segmentationSupported is None:
              raise MissingRequiredParameter("segmentationSupported required")
          if apdu.vendorID is None:
              raise MissingRequiredParameter("vendorID required")
  
          # extract the device instance number
          device_instance = apdu.iAmDeviceIdentifier[1]
          if _debug: WhoIsIAmServices._debug("    - device_instance: %r", device_instance)
  
          # extract the source address
          device_address = apdu.pduSource
          if _debug: WhoIsIAmServices._debug("    - device_address: %r", device_address)
docs: Respond to an I-Am request.