The table below explains the data your tracking device may transmit. Not every device sends every parameter — the actual set depends on the device model, its configuration, and the connected hardware.
System Parameters
| Parameter |
Meaning |
Units |
ident |
Device identifier (IMEI, serial number, etc.) |
— |
timestamp |
Time when telemetry was collected by the device (UNIX UTC) |
seconds |
server.timestamp |
Time when message was received by flespi channel (UNIX UTC) |
seconds |
channel.id |
ID of the flespi channel that received the message |
— |
protocol.id |
ID of the protocol used by the channel |
— |
peer |
Device IP:port that opened connection to the channel |
— |
device.id |
ID of the registered flespi device (if matched) |
— |
device.name |
Name of the registered flespi device (if matched) |
— |
device.type.id |
ID of the device type for the matched device |
— |
Position & Navigation
| Parameter |
Meaning |
Units |
position.latitude |
Latitude coordinate (WGS-84) |
degrees |
position.longitude |
Longitude coordinate (WGS-84) |
degrees |
position.altitude |
Altitude above sea level |
meters |
position.speed |
Instant speed at position fix |
km/h |
position.direction |
Heading angle (0 = North, clockwise) |
degrees |
position.satellites |
Number of satellites used for fix |
— |
position.valid |
Whether position data is accurate and usable |
boolean |
position.hdop |
Horizontal dilution of precision (lower = better) |
— |
position.pdop |
Position dilution of precision |
— |
position.fix.age |
Time since the last position fix |
seconds |
position.timestamp |
Timestamp when coordinates were calculated |
seconds |
position.source |
Source of coordinates if not GNSS (e.g. lbs, wifi, ble) |
— |
gnss.status |
GNSS receiver on/off status |
boolean |
Movement & Driving
| Parameter |
Meaning |
Units |
movement.status |
Current movement state |
boolean |
movement.event |
Movement detected event |
boolean |
engine.ignition.status |
Engine ignition / ACC status |
boolean |
idle.status |
Vehicle is in idling state |
boolean |
idle.status.duration |
Duration of current idling state |
seconds |
overspeeding.event |
Overspeeding detected |
boolean |
overspeeding.status |
Currently overspeeding |
boolean |
overspeeding.duration |
Duration of overspeeding interval |
seconds |
sleep.mode.status |
Device is in sleep mode |
boolean |
Mileage & Odometer
| Parameter |
Meaning |
Units |
vehicle.mileage |
Total calculated mileage |
km |
can.vehicle.mileage |
Total vehicle mileage read from CAN |
km |
total.mileage |
Total mileage (device-calculated) |
km |
trip.mileage |
Distance driven since engine start |
km |
segment.vehicle.mileage |
Mileage on the last segment between messages |
km |
gnss.vehicle.mileage |
Mileage calculated by GNSS |
km |
Engine & CAN Bus
| Parameter |
Meaning |
Units |
engine.rpm |
Engine RPM |
rpm |
can.engine.rpm |
Engine RPM read from CAN |
rpm |
engine.motorhours |
Total engine motor hours |
hours |
engine.temperature |
Engine temperature |
°C |
can.engine.coolant.temperature |
Engine coolant temperature from CAN |
°C |
can.engine.oil.temperature |
Engine oil temperature from CAN |
°C |
can.vehicle.speed |
Vehicle speed read from CAN |
km/h |
Fuel
| Parameter |
Meaning |
Units |
fuel.level |
Fuel level percentage |
% |
can.fuel.level |
Fuel level from CAN |
% |
fuel.consumed |
Total fuel consumed by vehicle |
liters |
can.fuel.consumed |
Total fuel consumed from CAN |
liters |
can.fuel.consumption |
Engine fuel rate from CAN |
liters/h |
can.fuel.consumption.distance |
Fuel consumption per distance from CAN |
liters/100km |
can.fuel.economy |
Instantaneous fuel economy from CAN |
km/liters |
trip.fuel.consumed |
Fuel consumed in the last trip |
liters |
average.fuel.consumption |
Average fuel consumption |
liters/100km |
Power & Battery
| Parameter |
Meaning |
Units |
external.powersource.voltage |
External power supply voltage |
volts |
battery.voltage |
Internal battery voltage |
volts |
battery.level |
Internal battery level |
% |
battery.charging.status |
Battery is charging |
boolean |
battery.low.status |
Battery is low |
boolean |
battery.low.alarm |
Battery low alarm event |
boolean |
backup.battery.voltage |
Backup battery voltage |
volts |
can.vehicle.battery.level |
EV/HEV battery level from CAN |
% |
can.vehicle.battery.voltage |
Vehicle battery voltage from CAN |
volts |
power.cut.alarm |
External power cut-off alarm |
boolean |
GSM / Cellular Network
| Parameter |
Meaning |
Units |
gsm.signal.level |
Signal strength level |
% |
gsm.signal.dbm |
Signal strength in dBm |
dBm |
gsm.cellid |
Base station cell ID |
— |
gsm.lac |
Location area code |
— |
gsm.mcc |
Mobile country code |
— |
gsm.mnc |
Mobile network code |
— |
gsm.operator.code |
Operator code (MCC+MNC) |
— |
gsm.network.type |
Network type (2G, 3G, 4G, LTE, etc.) |
— |
gsm.network.roaming.status |
Device is in roaming |
boolean |
gsm.jamming.event |
GSM signal jamming detected |
boolean |
gsm.sim.iccid |
SIM card ICCID |
— |
Digital & Analog I/O
| Parameter |
Meaning |
Units |
din |
Digital inputs bitmask |
— |
din.1 .. din.N |
Individual digital input status (boolean) |
boolean |
dout |
Digital outputs bitmask |
— |
dout.1 .. dout.N |
Individual digital output status (boolean) |
boolean |
ain |
Analog input voltage (indexed) |
volts |
ain.1 .. ain.N |
Individual analog input voltage |
volts |
Sensors & Environment
| Parameter |
Meaning |
Units |
device.temperature |
Device internal temperature |
°C |
sensor.temperature |
External temperature sensor value (indexed) |
°C |
ibutton.code |
Hexadecimal code of connected iButton |
— |
driver.id |
Driver identification card ID |
— |
Accelerometer
| Parameter |
Meaning |
Units |
x.acceleration |
Accelerometer X-axis value |
g |
y.acceleration |
Accelerometer Y-axis value |
g |
z.acceleration |
Accelerometer Z-axis value |
g |
absolute.acceleration |
Module of accelerometer vector |
g |
Harsh Driving Events
| Parameter |
Meaning |
Units |
harsh.acceleration.event |
Harsh acceleration detected |
boolean |
harsh.braking.event |
Harsh braking detected |
boolean |
harsh.cornering.event |
Harsh cornering detected |
boolean |
crash.event |
Crash event detected |
boolean |
Alarms & Events
| Parameter |
Meaning |
Units |
alarm.event |
Generic alarm triggered |
boolean |
sos.alarm |
SOS alarm triggered |
boolean |
towing.event |
Towing detected |
boolean |
tamper.alarm |
Tamper alarm event |
boolean |
unplug.alarm |
Device unplugged alarm |
boolean |
vibration.alarm |
Vibration alarm event |
boolean |
geofence.alarm |
Geofence alarm event |
boolean |
door.alarm |
Door alarm event |
boolean |
temperature.alarm |
Temperature out of range |
boolean |
fuel.loss.alarm.event |
Fuel loss alarm |
boolean |
Doors & Body (CAN)
| Parameter |
Meaning |
Units |
door.open.status |
Door open status |
boolean |
can.doors.status |
Any CAN door is opened |
boolean |
can.front.left.door.status |
CAN front left door opened |
boolean |
can.front.right.door.status |
CAN front right door opened |
boolean |
can.rear.left.door.status |
CAN rear left door opened |
boolean |
can.rear.right.door.status |
CAN rear right door opened |
boolean |
can.trunk.status |
CAN trunk is opened |
boolean |
can.hood.status |
CAN hood is opened |
boolean |
ADAS & DSM (Driver Monitoring)
| Parameter |
Meaning |
Units |
adas.collision.warning.event |
Forward collision warning (ADAS) |
boolean |
adas.pedestrian.event |
Pedestrian detected (ADAS) |
boolean |
dsm.distraction.event |
Driver distraction detected (DSM) |
boolean |
dsm.driver.phone.event |
Driver using phone (DSM) |
boolean |
dsm.seatbelt.event |
Driver seatbelt not fastened (DSM) |
boolean |
dsm.smoking.event |
Driver smoking (DSM) |
boolean |
dsm.yawning.event |
Driver yawning (DSM) |
boolean |
dsm.fatigue.event |
Driver fatigue detected (DSM) |
boolean |
BLE Beacons
| Parameter |
Meaning |
Units |
ble.beacons |
Array of detected BLE beacons (id, rssi, temperature, humidity, battery, etc.) |
array |
Diagnostic Trouble Codes
| Parameter |
Meaning |
Units |
can.dtc |
Array of DTC codes from CAN (spn, fmi, sa, status, etc.) |
array |
can.dtc.number |
Number of active DTCs |
— |
obd.connected.status |
OBD-II device is connected to vehicle |
boolean |
Message Metadata
| Parameter |
Meaning |
Units |
message.buffered.status |
Message was stored in device buffer (black box) before sending |
boolean |
report.code |
Protocol-specific report/event code |
— |
event.enum |
Protocol-specific event type code |
— |
Trip Statistics
| Parameter |
Meaning |
Units |
trip.average.speed |
Average speed of the trip |
km/h |
trip.max.speed |
Maximum speed of the trip |
km/h |
trip.harsh.acceleration.number |
Harsh acceleration count in trip |
— |
trip.harsh.braking.number |
Harsh braking count in trip |
— |
trip.harsh.cornering.number |
Harsh cornering count in trip |
— |
trip.overspeed.events |
Overspeed events count in trip |
— |
Notes:
- Indexed parameters like
din.1, ain.2, sensor.temperature.3 use a numeric suffix to distinguish multiple inputs/sensors of the same type.
- CAN parameters (
can.*) require the vehicle's CAN bus to be connected and the tracker to support CAN reading.
- ADAS/DSM parameters require devices with camera-based driver monitoring systems.
- BLE beacons (
ble.beacons) is a JSON array — each element contains fields like id, rssi, temperature, humidity, battery.voltage, etc.
- DTC codes (
can.dtc) is a JSON array — each element may contain spn, fmi, sa, status, standard, etc.
Note: Not every device sends every parameter — the actual set depends on your device's model, protocol, and configuration. For the complete, protocol-specific parameter reference with descriptions, data types, and units, see flespi.com/protocols → select your protocol → open the Parameters tab.
