KAVAN Smart PRO GPS2 Logger - Instruction manual
Introduction
The GPS LOGGER is a telemetry device that offers fast and accurate real-time position detection and feedback. It uses multiple satellite navigation systems to achieve maximum precision and resolution. Logging of all the data is possible due to its large integrated Flash memory. The logged data can be downloaded and analyzed on a computer using the free MAV Manager software.
Features
- Small dimensions, high measurement accuracy
- Large industrial memory for data logging
- Latest generation GPS chipset supporting multiple satellite systems
- 3-axis magnetometer/compass for external navigation purpose
- Backup supercapacitor for fast position fix after powering off
- Voltage measurement and logging
- Automatic telemetry detection: Duplex EX, Hott, MSB, S.Bus2, P2Bus. Automatic timezone detection
- Configuration through the transmitter
- Firmware updates.
| GPS logger | |
|---|---|
| Dimensions | 28×30×9 mm |
| Weight | 14 g |
| Memory | 256 MB |
| Supported positioning systems | GPS, GALILEO, GLONASS |
| Recording time (5 samples/s) | 66 hours |
| Sampling | 10Hz, 5Hz, 2Hz, 1Hz |
| Flash endurance | 100.000 erase cycles |
| Operating current | 50mA |
| Operating temperature | -20–85°C |
| Supply Voltage | 3.5–8.4V |
| Telemetry | Duplex EX, Multiplex MSB, Graupner Hott, Futaba S.Bus2, PowerBox P²Bus |
| Status LED | YES |
| GNSS receiver sensitivity | -167dBm |
| GNSS max. acceleration | 4G |
Available telemetry
The telemetry options depend on the used radio control system. The complete data are automatically logged in the internal Flash memory.
| Parameter | Description |
|---|---|
| Timestamp | Current precise GPS time. |
| Latitude | Coordinate North/South. |
| Longitude | Coordinate East/West. |
| Status | Indication of activity (1=got fix) or fault condition. |
| Sattelites | Number of detected satellites. |
| Abs. altitude | Altitude above the mean sea level. |
| Distance | Distance from the “Home position”. |
| Speed | 2D/3D speed referenced to the ground. The speed type can be set in the configuration. |
| Rel. altitude | Altitude relative to the “Home position”. |
| Course | Direction of the flight (heading). Values in range 0°–359°: 0° = North, 90°=East, 180°=South, 270°=West. Compass heading is used if the speed is zero. |
| Azimuth | Position of the model with respect to the “Home position”. Values in range 0°–359°: 0° = North, 90°=East, 180°=South, 270°=West. |
| Temperature | Internal temperature. |
| Magnetometer X/Y/Z | 3-axis magnetometer value. It can be used for further calculations. |
| Voltage | Receiver voltage. (logged only) |
| Trip | Distance travelled during the flight. (logged only) |
Installation
Connect the GPS LOGGER to the receiver telemetry port. Place the device on top of the plane, so that the internal patch antenna is not shielded in any direction. Shielding materials, such as metal, carbon or anything conducting, can reduce the performance of position detection. Additionally, make sure that the 2.4GHz antennas are located at least 20cm or more from the GPS LOGGER. Try to avoid any mechanical stress on the sensor and avoid any close contact with components producing heat (such as engines or speed controllers). Use a soft double-sided adhesive tape, or Velcro as an alternative.
For good performance of the integrated magnetometer it is necessary to install the device at least 20cm away from magnetized objects and cables powering servos/motors. In addition, please keep the device orientation with respect to the flight direction as shown in the picture below.
Power up the receiver with GPS LOGGER attached. The red LED flashes once to indicate correct initialization. After a few seconds (or minutes if the device has been unpowered for more than a day), the device reports “3D position fix”. From this moment on, the device can start logging depending on the condition set in the configuration. The logging is indicated by a flashing LED synchronously with the sampling rate.
Each time the logging is started, a new file is created at the internal Flash storage. The log files are named according to current date and time in the following format:
“GYYYYMMDD HHhNN.log” (where YYYY = year, MM = month, DD = day, HH = hour and NN = minute). Example: G20210605 20h47.log
It is not necessary to delete old log files manually. As soon as there is not enough free space, the oldest log files are deleted automatically. The internal file system is robust an immune against power failures, so battery may be disconnected at any time.
Telemetry and settings
The device is compatible with JETIBOX and HOTT SMART-BOX for programming. The JETIBOX menu is divided into three sections:
Actual values
Displays the latest telemetry values (altitude, distance, position, temperature) together with minimums and maximums.
Settings
Basic settings of the sensor.
Language
You can choose the language of the JETIBOX screen.
Timezone
Press LEFT+RIGHT to switch between automatic timezone detection and manual configuration. If the “Auto” mode is used, the detected timezone is displayed as soon as the sensor has a position fix. If the timezone is detected incorrectly, switch to “Manual” mode and type the zone using LEFT or RIGHT keys. For example, Central Europe uses GMT+1, while US Eastern Time uses GMT-5.
Apply DST
Set “Yes” if you want to use the Daylight Saving Time (or Sommer Time) – this function will add or subtract one hour depending on your current location.
Speed measure
Set “2D” option in case you need to use just groundspeed measurement (walking, boat, and car). In case of a flying model, use “3D” measurement type to include also vertical component. This parameter influences the speed, distance and trip (route) measurements.
GPS profile
Set the GPS profile according to supposed usage. This parameter influences accuracy and speed/latency of position detection.
- Air 1G - flying objects that do not change direction very fast (large scale models, gliders, cinematic drones...).
- Air 2G - faster flying objects that perform basic maneuvers (trainers, EPP...).
- Air 4G - fast flying objects that are capable of aerobatics (3D aerobatic models, F3A, jets). Default option.
- Walk/2D - slow motion on the ground.
- Car/2D - a mode suitable for a car.
Log period
Set the logging period according to your preferences. The maximum value (10Hz) stores data 10 times per second and can cover all details of the flight. Please note that with higher logging rate also the size of log files grows faster.
Logging
Set the condition that must be fulfilled to start logging:
- Auto/Fix - the logging starts automatically as soon as the position is determined (the logger gets 3D fix).
- Auto/10kmh - the logging starts automatically as soon as the logger gets 3D fix and the speed exceeds 10km/h.
- Start/Stop - the logging starts after the 3D fix and speed exceeds 10km/h. It stops after 10 seconds below 5km/h.
Home location
If “Automatic” mode is used, the home location is determined after each startup – it is the position where the GPS LOGGER gets its first position fix. The following telemetry is calculated with respect to the home location: Relative altitude, distance and azimuth. In “Manual” mode the last known home location is used.
Set home location
By pressing LEFT+RIGHT arrows you can set the current GPS coordinates as a reference point. The home location is updated independently on the Auto/Manual settings. The home location is updated also if you press LEFT+RIGHT arrows on the JETIBOX main telemetry screen.
Minimum satellites
Set the minimum number of detected satellites before confirming the 3D position fix.
Startup HDOP
Set the initial required “horizontal delusion of precision” before confirming the 3D position fix. The HDOP parameter says how much we can trust the position measurement where lower value is better. For example, value 2.0 states that the typical deviance of current measurement from ideal position is up to 2 meters.
Service
In this menu you can view the device version and reset it to the default factory configuration.
Memory/Free
Shows the available space at the internal Flash memory.
Format
In case of a file system error you may format the Flash memory. Please note that this procedure erases all the data – even configuration.
Clear logs
Deletes all log files.
Compass, Compass (Home)
Displays current magnetometer measurement compared to an ideal measurement, which is calculated on the basis of the GPS location.
Graupner Hott Menu Structure
The GPS LOGGER offers telemetry as a standard GPS telemetry module.
Futaba and Multiplex connection
Futaba and Multiplex systems do not offer wireless device configuration. The telemetry transmission is possible with the following fixed sensor slots: