code: def register_json(self, data):
          
          j = json.loads(data)
          self.last_data_timestamp = \
                  datetime.datetime.utcnow().replace(microsecond=0).isoformat()
          try:
              for v in j:
                  # prepare the sensor entry container
                  self.data[v[self.id_key]] = {}
                  # add the mandatory entries
                  self.data[v[self.id_key]][self.id_key] = \
                                              v[self.id_key]
                  self.data[v[self.id_key]][self.value_key] = \
                                              v[self.value_key]
                  # add the optional well known entries if provided
                  if self.unit_key in v:
                      self.data[v[self.id_key]][self.unit_key] = \
                                              v[self.unit_key]
                  if self.threshold_key in v:
                      self.data[v[self.id_key]][self.threshold_key] = \
                                              v[self.threshold_key]
                  # add any further entries found
                  for k in self.other_keys:
                      if k in v:
                          self.data[v[self.id_key]][k] = v[k]
                  # add the custom sensor time
                  if self.sensor_time_key in v:
                      self.data[v[self.sensor_time_key]][self.sensor_time_key] = \
                                              v[self.sensor_time_key]
                  # last: add the time the data was received (overwriting any
                  # not properly defined timestamp that was already there)
                  self.data[v[self.id_key]][self.time_key] = \
                                              self.last_data_timestamp
          except KeyError as e:
              print("The main key was not found on the serial input line: " + \
                      str(e))
          except ValueError as e:
              print("No valid JSON string received. Waiting for the next turn.")
              print("The error was: " + str(e))
docs: Register the contents as JSON