Data packet structures

Field description

Data type

Data presentation

LEN

U8

X (count of bytes except LEN)

Data type

U4

DT=7

TIME

U28

UnixTime = TIME*2+0x47798280

If integration is done after January 5th 2025, 0x47798280 shall be replaced with 0x6779827E

Mask1

U16

Bit

Name of data or
dataset

Size of
dataset

Sensor names

0

Coord. group

17

Sensor name

Byte offset

Size of byte

Longitude

+0

4

Latitude

+4

4

Speed

+8

1

Satellites

+9

b[0,1,2,3]

Hdop

+9

b[4,5,6,7]

Course

+10

1

Altitude

+11

2

odo

+13

4

1

Digital inputs status

2

in1 to in16

2

ADC1

2

adc1

3

ADC2

2

adc2

4

ADC3

2

adc3

5

ADC4

2

adc4

6

ADC5

2

adc5

7

ADC6

2

adc6

8

ADC7

2

adc7

9

ADC8

2

adc8

10

Counter Frequency  Group1

4

Sensor name

Byte offset

Size of byte

c1

+0

2

c2

+2

2

11

Counter Frequency Group2

4

Sensor name

Byte offset

Size of byte

c3

+0

2

c4

+2

2

12

Filtered adc 1

2

lvl1

13

Filtered adc 2

2

lvl2

14

GSM info group

9

Sensor name

Byte offset

Size of byte

mcc

+0

2

mnc

+2

1

lac

+3

2

cell_id

+5

2

ta

+7

1

gsm_lvl 

+8

1

15

Mask2 present

bit

bit

Mask2

U16

Bit

Name of data or
dataset

Size of
dataset

Sensor names

0

Wheel speed

2

wheel_speed

1

J1939 Acceleration pedal position

1

acc_pedal

2

J1939 Total fuel used

4

total_fuel

3

J1939 Fuel level

1

can_fls

4

J1939 Engine Speed

2

can_taho

5

J1939 Total engine hours

4

can_engine_hrs

6

J1939 Total vehicle distance

4

can_mileage

7

1939 Engine Coolant temperature

1

engine_temp

8

J1939 Fuel level2

1

j1939_fuel_lvl2

9

J1939 Engine load

1

j1939_eng_load

10

J1939 Service distance

2

j1939_srv_dist

11

J1939 TCO1(8 bytes structure of few sensors)

8

Sensor name

Byte offset

Size of byte

tco1_drv1_work

+0

b[0,1,2]

tco1_drv2_work

+0

b[3,4,5]

j1939_motion

+0

b[6,7]

tco1_drv1_time

+1

b[0,1,2,3]

tco1_drv1_crd

+1

b[4,5]

tco1_overspeed

+1

b[6,7]

tco1_drv2_time

+2

b[0,1,2,3]

tco1_drv2_crd

+2

b[4,5]

tco1_event

+3

b[0,1]

tco1_handl

+3

b[2,3]

tco1_perf

+3

b[4.5]

tco1_dir

3

b[6,7]

reserved

+4

2

tco1_speed

+6

2

12

J1939 Ambient Air Temperature 

2

j1939_air_temp

13

Squarell

Trailer-ID

8

Sensor name

Byte offset

Size of byte

trailer1_id

0

3

trailer1_status

3

1

trailer2_id

4

3

trailer2_status

7

1

14

J1939 Fuel Rate

2

j1939_fuel_rate

15

Mask3 present

bit

bit

Mask3

Bit

Name of data or
dataset

Size of
dataset

Sensor names

0

J1939 Instantaneous Fuel Economy

2

j1939_flfmseco

1

J1939 High Resolution Fuel Consumption

4

j1939_fl_con

2

J1939 Axle weight

3

j1939_axle_wgt
(need special parsing)
 (Recommended to use new type Mask4)

3

J1939 MIL Status

1