array(8) {
  ["version"]=>
  int(2)
  ["device_id"]=>
  int(402)
  ["water_potential_value"]=>
  float(-11.7)
  ["water_potential_unit"]=>
  string(3) "kPa"
  ["soil_temperature_value"]=>
  float(16.1)
  ["soil_temperature_unit"]=>
  string(3) "°C"
  ["battery_voltage_value"]=>
  float(3.109)
  ["battery_voltage_unit"]=>
  string(1) "V"
}
array(4) {
  ["version"]=>
  int(2)
  ["device_id"]=>
  int(402)
  ["battery_voltage_value"]=>
  float(3.109)
  ["battery_voltage_unit"]=>
  string(1) "V"
}