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OpenLog Artemis : Sensor Units

This document summarizes the units used for each sensor measurement.

Index

Built-in Inertial Measurement Unit:

Global Navigation Satellite System (GNSS) navigation data:

Pressure, Altitude, Humidity and Temperature Data:

Differential Pressure:

Air Quality and Environmental Sensors:

Distance:

Precision Temperature Sensors:

Weight:

ADC:

Biometric Sensors:

Inertial Measurement Unit:

Magnetometer:

Accelerometer:

Sensor Units

ICM-20948 IMU
Accelerometer aX,aY,aZ milli g
Gyro gX,gY,gZ Degrees per Second
Magnetometer mX,mY,mZ micro Tesla
Temperature imu_degC Degrees Centigrade

u-blox GNSS boards
Date gps_Date MM/DD/YYYY or DD/MM/YYYY
Time gps_Time HH:MM:SS.SSS
Lat & Lon gps_Lat,gps_Long Degrees-7
Altitude gps_Alt mm
Altitude MSL gps_AltMSL mm
SIV gps_SIV Count
Fix Type gps_FixType 0-5
Carrier Soln. gps_CarrierSolution 0-2
Ground Speed gps_GroundSpeed mm/s
Heading gps_Heading Degrees-5
PDOP gps_pDOP 10-2 (dimensionless)
Time Of Week gps_iTOW ms

Lat = Latitude
Lon = Longitude
MSL = Metres above Sea Level
SIV = Satellites In View
PDOP = Positional Dilution Of Precision

Fix Type:
0: No
1: Dead Reckoning Only
2: 2D
3: 3D
4: GNSS + Dead Reckoning
5: Time Only

Carrier Solution:
0: No
1: Float Solution
2: Fixed Solution

BME280 atmospheric sensor
Pressure pressure_Pa Pascals
Humidity humidity_% Percent
Altitude altitude_m m
Temperature temp_degC Degrees Centigrade

LPS25HB absolute pressure sensor
Pressure pressure_hPa hectoPascals
Temperature pressure_degC Degrees Centigrade

MS8607 PHT sensor
Humidity humidity_% Percent
Pressure hPa hectoPascals
Temperature degC Degrees Centigrade

MPR0025PA MicroPressure sensor
Pressure (PSI) PSI Pounds per Square Inch
Pressure (Pa) Pa Pascals
Pressure (kPa) kPa kiloPascals
Pressure (torr) torr torr
Pressure (inHg) inHg inches of Mercury
Pressure (atm) atm atmospheres
Pressure (bar) bar barometric pressure

MS5637 barometric pressure sensor
Pressure pressure_hPa hectoPascals
Temperature temperature_degC Degrees Centigrade

MS5837 depth pressure sensor
Pressure mbar millibar
Temperature degC Degrees Centigrade
Depth depth_m Metres
Altitude alt_m Metres

SDP3X differential pressure sensor
Pressure Pa Pascals
Temperature degC Degrees Centigrade

AHT20 humidity and temperature sensor
Humidity humidity_% Percent
Temperature degC Degrees Centigrade

SHTC3 humidity and temperature sensor
Humidity humidity_% Percent
Temperature degC Degrees Centigrade

CCS811 air quality sensor
VOC tvoc_ppb Parts Per Billion
CO2 co2_ppm Parts Per Million

VOC = Volatile Organic Compounds

VEML6075 UV light sensor
UVA uva
UVB uvb
UV Index uvIndex

SGP30 air quality and VOC sensor
Total VOC tvoc_ppb Parts Per Billion
CO2 co2_ppm Parts Per Million
H2 H2 none
Ethanol ethanol none

SGP40 air quality sensor
VOC Index VOCindex none

SCD30 CO2 humidity and temperature sensor
CO2 co2_ppm Parts Per Million
Humidity humidity_% Percent
Temperature degC Degrees Centigrade

SN-GCJA5 Particle Sensor
Particle Density (1.0µm) PM1_0 µg/m3
Particle Density (2.5µm) PM2_5 µg/m3
Particle Density (10µm) PM10 µg/m3
Particle Count (0.5µm) PC0_5 Count
Particle Count (1.0µm) PC1_0 Count
Particle Count (2.5µm) PC2_5 Count
Particle Count (5.0µm) PC5_0 Count
Particle Count (7.5µm) PC7_5 Count
Particle Count (10µm) PC10 Count
Sensor Status Sensors
Photodiode Status PD 0-3
Laser Diode Status LD 0-3
Fan Status Fan 0-3

Sensor status:
PD LD Fan
0 0 0 0
1 Any 1, nor 2 & 3
2 Any 2
3 Any 3 nor 2

PD status:
0: Normal status
1: Normal status (within -80% against initial value), with S/W correction
2: Abnormal (below -90% against initial value), loss of function
3: Abnormal (below -80% against initial value), with S/W correction

LD operational status:
0: Normal status
1: Normal status (within -70% against initial LOP), with S/W correction
2: Abnormal (below -90% against initial LOP) or no LOP, loss of function
3: Abnormal (below -70% against initial LOP), with S/W correction

Fan operational status:
0: Normal status
1: Normal status (1,000rpm or more), with S/W correction
2: In initial calibration
3: Abnormal (below 1,000rpm), out of control

VL53L1X laser ToF sensor
Distance distance_mm mm
Range Status distance_rangeStatus(0=good)
Signal Rate distance_signalRate

VCNL4040 proximity sensor
Proximity prox(no unit) none
Ambient Light ambient_lux

MCP9600 thermocouple amplifier
Temperature thermo_degC Degrees Centigrade
Ambient Temperature thermo_ambientDegC Degrees Centigrade

Qwiic PT100 ADS122C04 platinum resistance sensor
Temperature (C) degC Degrees Centigrade
Temperature (F) degF Degrees Fahrenheit
Temperature Internal degC Degrees Centigrade
Raw Voltage V*2.048/2^23 Volts * 2.048 / 223

TMP117 precision temperature sensor
Temperature degC Degrees Centigrade

NAU7802 load cell sensor
Weight weight(no unit) none

Pulse Oximeter
bpm heart rate beats per minute
conf% confidence percent
O2% oxygen level percent
stat sensor status 0 to 3
eStat extended status -6 to 1
O2R oxygen SpO2 R value

Sensor status:
0: No object detected
1: Object detected
2: Object other than finger detected
3: Finger detected

Extended status:
0: Success
+1: Not ready
-1: Object detected
-2: Excessive sensor device motion
-3: No object detected
-4: Pressing too hard
-5: Object other than finger detected
-6: Excessive finger motion

ISM330DHCX IMU
Accelerometer aX,aY,aZ milli g
Gyro gX,gY,gZ milli Degrees per Second

MMC5983MA Magnetometer
Magnetometer mX,mY,mZ Gauss
Temperature degC Degrees Centigrade

KX134 Accelerometer
Accelerometer aX,aY,aZ g

ADS1015 ADC
Voltage A0mV,A1mV,A2mV,A3mV,A0A1mV,A0A3mV,A1A3mV,A2A3mV milliVolts