array(8) {
  ["version"]=>
  int(2)
  ["device_id"]=>
  int(4369)
  ["dendrometer_a_position_value"]=>
  float(976.92966461182)
  ["dendrometer_a_position_unit"]=>
  string(3) "µm"
  ["dendrometer_b_position_value"]=>
  float(11259.996891022)
  ["dendrometer_b_position_unit"]=>
  string(3) "µm"
  ["battery_voltage_value"]=>
  float(3.156)
  ["battery_voltage_unit"]=>
  string(1) "V"
}