docs: def _st_decode(self, msg):
          """ST: Temperature update."""
          group = int(msg[4:5])
          temperature = int(msg[7:10])
          if group == 0:
              temperature -= 60
          elif group == 1:
              temperature -= 40
          return {'group': group, 'device': int(msg[5:7])-1,
                  'temperature': temperature}