code: def extract_notification_payload(process_output):
          
          data = []
          for element in process_output.splitlines()[1:]:
              parts = element.split(": ")
              if len(parts) == 2:
                  data.append(parts[1])
          return data
docs: Processes the raw output from Gatttool stripping the first line and the
              'Notification handle = 0x000e value: ' from each line
          @param: process_output - the raw output from a listen commad of GattTool
          which may look like this:
              Characteristic value was written successfully
              Notification handle = 0x000e value: 54 3d 32 37 2e 33 20 48 3d 32 37 2e 30 00
              Notification handle = 0x000e value: 54 3d 32 37 2e 32 20 48 3d 32 37 2e 32 00
              Notification handle = 0x000e value: 54 3d 32 37 2e 33 20 48 3d 32 37 2e 31 00
              Notification handle = 0x000e value: 54 3d 32 37 2e 32 20 48 3d 32 37 2e 33 00
              Notification handle = 0x000e value: 54 3d 32 37 2e 33 20 48 3d 32 37 2e 31 00
              Notification handle = 0x000e value: 54 3d 32 37 2e 31 20 48 3d 32 37 2e 34 00
  
  
              This method strips the fist line and strips the 'Notification handle = 0x000e value: ' from each line
          @returns a processed string only containing the values.