array(14) {
  ["version"]=>
  int(2)
  ["device_id"]=>
  int(980)
  ["counter_reading_value"]=>
  int(15350)
  ["measurement_interval_value"]=>
  float(0.99996948242188)
  ["frequency_value"]=>
  float(15350.46845912)
  ["frequency_unit"]=>
  string(2) "Hz"
  ["weight_value"]=>
  float(-47.506689639935)
  ["weight_unit"]=>
  string(1) "g"
  ["elongation_value"]=>
  float(0.69882577993792)
  ["elongation_unit"]=>
  string(3) "µm"
  ["strain_value"]=>
  float(10.588269392999)
  ["strain_unit"]=>
  string(12) "µm⋅m⁻¹"
  ["battery_voltage_value"]=>
  float(3.168)
  ["battery_voltage_unit"]=>
  string(1) "V"
}
array(4) {
  ["version"]=>
  int(2)
  ["device_id"]=>
  int(980)
  ["battery_voltage_value"]=>
  float(3.168)
  ["battery_voltage_unit"]=>
  string(1) "V"
}