Wireless Digital Video:Telemetry OSD

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High Definition Telemetry OSD

Introduction

Figure 1 - WiDV One transmitter port for autopilot

WiDV features two different user configurable telemetry OSD, a set of flight instruments simulating real plane's instruments and a classic FPV HUD. Using the settings menu users can select the OSD they wish to activate.

The telemetry OSD collects all information from the autopilot's plane connected to the WiDV transmitter and it is sent to the WiDV receiver. Then the WiDV receiver shows all that telemetry information on the screen using the selected telemetry OSD.

In order to connect WiDV transmitter to the autopilot, the transmitter includes a serial port (figure 1) with a 4 pin - 2.50mm JST-XH male connector. By simpling connecting the autopilot to WiDV, the telemetry OSD gets activated automatically.

WiDV currently supports any autopilot that uses mavlink or ikarus telemetry. In case of using a WiDV Professional receiver, this telemetry also is sent to the ground station or any other external equipment like a computer or antenna tracker.


OSD

Flight instruments

Flight instruments.png

The flight instruments OSD includes, from left to right:

  • A text box to display gps information, flight mode, distance and battery consumption
  • Ground speed
  • Artificial horizon
  • Altimeter
  • Vertical speed
  • Course over ground ( Green arrow: Heading, Red arrow: Return to home course )
  • Throttle and battery level indicators


Flying with flight instruments:

Classic FPV HUD

The classic FPV HUD is able to show the next telemetry information: Flight mode, Engine status: armed/disarmed, GPS location, Number of satellites, Climb rate, Throttle, Boot time, Flight time, Voltage battery, current battery, Battery remaining, Temperature, Distance from home, Course to home, Autopilot load and RSSI level.


Configuring and flying with classic FPV HUD:

Example of connecting WiDV to Ardupilot

Example using Ardupilot firmware 3.1: This firmware uses a default baudrate of 57600 for the telemetry port:

Figure 2 - Ardupilot Telemetry pinout

The serial's port baudrate of your autopilot and WiDV needs to be the same. Check your autopilot's manual to find out the baudrate that it is using. You can change WiDV serial's port baudrate using the configuration file.

The telemetry OSD will appear automatically as soon as the first telemetry message arrives to WiDV transmitter by the serial port.

Step 1: Edit the configuration file of your transmitter and set the baudrate to 57600:

...
[serial]
baudrate = 57600
...

Step 2: Connect one side of your WiDV telemetry cable to your WiDV transmitter and the other side to the telemetry port of your Ardupilot (figure 2).

  • If you are buying a WiDV kit and you specify which autopilot you are planning to use, we will include the cable for your autopilot free of charge.
  • If you need to buy a second cable for your autopilot please visit the online store.
  • If you want to build the cable yourself, you only need to connect 3 cables, TX, RX and GND. You will need to cross RX and TX:
            GND ========= GND 
WiDV         TX ========= RX    Ardupilot
             RX ========= TX

Important: Do not connect the Vcc pins.


Any questions, do not hesitate to contact us: support@wirelessdv.com

Example of connecting WiDV to Pixhawk

Figure 3 - Pixhawk Telemetry pinout

Step 1: Edit the configuration file of your transmitter and set the baudrate to match de baudrate of pixhawk, for example 57600:

...
[serial]
baudrate = 57600
...

In your pixhawk set explicitly the Parameter "BRD_SER1_RTSCTS" to 0

Step 2: Connect one side of your WiDV telemetry cable to your WiDV transmitter and the other side to the telemetry port of your Pixhawk.

  • If you are buying a WiDV kit and you specify which autopilot you are planning to use, we will include the cable for your autopilot free of charge.
  • If you need to buy a second cable for your autopilot please visit the online store.
  • If you want to build the cable yourself, you only need to connect 3 cables, TX, RX and GND. You will need to cross RX and TX:
            GND ========= GND 
WiDV         TX ========= RX    Pixhawk
             RX ========= TX

Important: Do not connect the Vcc pins.


Any questions, do not hesitate to contact us: support@wirelessdv.com

Integration with other autopilots

If you are an autopilot manufacturer that uses any other protocol and you would like WiDV to display your telemetry, please send us an email to support@wirelessdv.com