Data Formats
The following file types can be recorded by trackers:
- Data Formats
.POS– Position data-
.IMU– Inertial measurement data -
Log Files
.LOG
Data Files (.POS file)
The .POS file contains the data about the GPS position of the device, with the following columns:
E6305F324C67969A
TIME RTC,TIME GPS,FIX TYPE,LAT,LONG,ALT,HDOP,VDOP,SATELLITES,TTF,UPTIME,TEMP MCU,AX MEAN,AX VAR,AY MEAN,AY VAR,AZ MEAN,AZ VAR,V BAT
UTC,UTC,ENUM,deg,deg,m,,,,s,s,deg C,G,G2,G,G2,G,G2,V
ISO8601,ISO8601,int,float,float,float,float,float,int,int,float,float,float,float,float,float,float,float,float
20000101T000052Z,00000000T000000Z,0,0.000000,0.000000,0.000000,0.000000,0.000000,0,0,0.000000,0.000000,-0.150332,0.030555,-0.742760,0.003693,0.651593,0.023955,3.663000
This file can be imported into the Wonderland platform, as illustrated in the screenshot below:
![[image]](../../wonderland/media/AddFileWonderland.png)
Time Information
- TIME RTC (real-time clock timestamp in ISO8601 format)
- TIME GPS (GPS timestamp in ISO8601 format)
Positioning Data
- FIX TYPE (GPS fix status as an integer enum)
- LAT and LON (degrees)
- ALT (meters)
- HDOP / VDOP (horizontal and vertical dilution of precision)
- SATELLITES number of satellites
Number of Satellites
- TTF (Time To Fix, in seconds)
System Metrics
- UPTIME (seconds)
- TEMP MCU Temperature (°C)
- V BAT (battery supply voltage)
Accelerometer Statistics
Mean and variance values for X, Y, and Z axes (in G and G²)
- AX MEAN
- AX VAR
- AY MEAN
- AY VAR
- AZ MEAN
- AZ VAR
Realtime Data File(.IMU)
This file records inertial measurement unit (IMU) sampling data and includes the following fields:
- TIME RTC (EPOCH) – Timestamp in Unix epoch format
- FIFO TIME (µs) – High-resolution timestamp in microseconds
- TEMP IMU (°C) – Temperature of the inertial measurement unit
- ACC X, ACC Y, ACC Z (m/s²) – Acceleration along the three spatial axes
- GYR X, GYR Y, GYR Z (deg/s) – Angular velocity (gyroscope readings) along the three axes.
E6305F324C67969A
TIME RTC,FIFO TIME,TEMP IMU,ACC X,ACC Y,ACC Z,GYR X,GYR Y,GYR Z
EPOCH,us,deg C,m/s2,m/s2,m/s2,deg/s,deg/s,deg/s
int,int,int,float,float,float,float,float,float
946684836,10915,2644,-0.361572,-0.725952,0.602905,-2.647400,-2.014160,-0.190735
946684836,21010,2644,-0.363159,-0.722168,0.615967,-0.144958,1.449585,0.396729
946684837,31105,2644,-0.359131,-0.724365,0.607544,-0.091553,0.190735,-0.419617
946684837,41200,2644,-0.355957,-0.726807,0.606079,-1.960754,-4.531860,0.358582
946684837,51294,2644,-0.356934,-0.724487,0.615356,-1.281738,-2.593994,-0.373840
946684837,61389,2644,-0.354248,-0.726318,0.617188,1.068115,4.600525,-1.510620
LOG Files (.LOG file)
The .LOG file is a file that is used on the startup and contains the configuration log from SD card and EEPROM (Electrically Erasable Programmable Read-Only Memory), the file captures a complete device boot cycle: configuration loading, LoRaWAN network joining, IMU initialization, and SD card data logging.
Example of the .LOG file:
AT Command : Configuration Property : Value
----------------------------------------------------------------------------------------------------------------------
AT+TX_INTERVAL_SEC : normalTxInterval_seconds : 60
AT+TX_STANDBY_MIN : standbyTxInterval_minutes : 15
AT+PERIOD : measureInterval_minutes : 15
- : sendLastItemFirst : 1
AT+OP_MODE : measurementEnabled : 1
+ : syncMesurementIntervalToHour : 0
- : ledDisabled : 0
- : enable_imu : 1
- : enable_sdcard : 1
- : enable_imu_log : 1
AT+SD_PERIOD_SEC : samplingInterval_seconds : 15
- : firmware_version : 0.1.0.ffff-devel
AT+TPERIOD : terminatedMeasureInterval_minutes : 0, 0, 0