docs: def current_room_temp(self):
          """Return current room temperature for in-progress session."""
          try:
              rmtemps = self.intervals[0]['timeseries']['tempRoomC']
              num_temps = len(rmtemps)
  
              if num_temps == 0:
                  return None
  
              rmtemp = rmtemps[num_temps-1][1]
          except KeyError:
              rmtemp = None
          return rmtemp