array(8) {
  ["version"]=>
  int(2)
  ["device_id"]=>
  int(729)
  ["temperature_target_value"]=>
  float(27.3)
  ["temperature_target_unit"]=>
  string(3) "°C"
  ["temperature_head_value"]=>
  int(22)
  ["temperature_head_unit"]=>
  string(3) "°C"
  ["battery_voltage_value"]=>
  float(3.156)
  ["battery_voltage_unit"]=>
  string(1) "V"
}
array(4) {
  ["version"]=>
  int(2)
  ["device_id"]=>
  int(729)
  ["battery_voltage_value"]=>
  float(3.156)
  ["battery_voltage_unit"]=>
  string(1) "V"
}