array(6) {
  ["version"]=>
  int(2)
  ["device_id"]=>
  int(2226)
  ["current_value"]=>
  float(13.73291015625)
  ["current_unit"]=>
  string(2) "mA"
  ["battery_voltage_value"]=>
  float(3.168)
  ["battery_voltage_unit"]=>
  string(1) "V"
}
array(4) {
  ["version"]=>
  int(2)
  ["device_id"]=>
  int(2226)
  ["battery_voltage_value"]=>
  float(3.168)
  ["battery_voltage_unit"]=>
  string(1) "V"
}