array(8) {
  ["version"]=>
  int(2)
  ["device_id"]=>
  int(735)
  ["raw_sensor_reading_value"]=>
  float(455.65795898438)
  ["raw_sensor_reading_unit"]=>
  string(2) "mV"
  ["volumetric_water_content_value"]=>
  float(-0.12085977245469)
  ["volumetric_water_content_unit"]=>
  string(12) "m³⋅m⁻³"
  ["battery_voltage_value"]=>
  float(3.168)
  ["battery_voltage_unit"]=>
  string(1) "V"
}
array(4) {
  ["version"]=>
  int(2)
  ["device_id"]=>
  int(735)
  ["battery_voltage_value"]=>
  float(3.168)
  ["battery_voltage_unit"]=>
  string(1) "V"
}