Firmware update process for APM MavLink to FrSky SmartPort Converter

HOWTO : Firmware update process for APM MavLink to FrSky SmartPort Converter AIRBORNE PROJECTS to be compliant OpenTX 2.1.7.

The converter must be disconnected from the Smartports before starting.

You must connect the USB interface converter to the PC with Windows 7, 8 or 10 and install the driver.

  • Installing drivers for the Seeeduino with window7

Download : arduino-1.6.8-windows.exe

Plug in your board and wait for Windows to begin its driver installation process. After a few moments, the process will fail.

Open the Device Manager by right clicking “My computer” and selecting control panel.

Look under Ports (COM & LPT). You should see an open port named « USB Serial Port » Right click on the « USB Serial Port » and choose the « Update Driver Software » option.

Sample driver input directory : C:\Program Files (x86)\Arduino\drivers\FTDI USB Drivers\amd64

  • Installing drivers for the Seeeduino with window8 or windows10

HOWTO here : Installing_drivers_for_the_Seeeduino_with_window8

You should save these files which you are editing before installing driver with window8,because there will several power off during operating.

  1. Press “Windows Key” +”R”
  2. Enter shutdown.exe /r /o /f /t 00
  3. Click the « OK » button.
  4. System will restart to a « Choose an option » screen
  5. Select « Troubleshoot » from « Choose an option » screen
  6. Select « Advanced options » from « Troubleshoot » screen
  7. Select « Windows Startup Settings » from « Advanced options » screen
  8. Click « Restart » button
  9. System will restart to « Advanced Boot Options » screen
  10. Select « Disable Driver Signature Enforcement » (1)
  11. Once the system starts, you can install the Arduino drivers as same as Windows

(1) Screen capture (sorry but in French : option 7) :


 Executing the firmware update:

Once your converter is recognized by Windows on a port COM,  you need to run the chapter of procedure :

Appendix A How to update the firmware’s Converter

using the Quick-Start-Guide Guide.pdf

For this you must download the archive

Xloader.exe is in the archive here: \frsky_telemetry\Firmware\XLoader

Select Device : Duemilanove/Nano(ATmega328) and frsky_telemetry.hex here: \frsky_telemetry\Firmware

Update your telemetry screen1 and screen2  in  SCRIPTS/TELEMETRY directory with files  telem1.lua and telem2.lua from \frsky_telemetry\Lua\2.1.X

Finaly rediscover your telemetry sensors on Taranis Radio.

Wifibroadcast 2.3ghz and video streaming with Wifi AP

pre-requisites : you must configure your access point on the Ground Control Station (GCS) here : Ground Station Wifi Access Point Configuration

First solution: Broadcast over wifi network at 2.3GHz & 30dBm (1) from the drone « MyPiDrone » using the AP on the ground station (WiFi Access Point on Ubuntu)

This method allow to transmit video to devices connected to the AP of the ground control station (PC with Ubuntu). Also it’s possible to address several other OS such as:

(1) Configuration of wireless network 2.3GHz under Android is not yet finalized for the moment. However  you can validate this solution at 2.4Ghz with Android Beta Tower or QtGStreamerHUD.apk

Here we use a TP-LINK (wlan0) on the drone and a TP-LINK (wlan0) on the ground control station.

Please note however that solution is less efficient than the Wifibroadcast (lower range and more latency): We have validated this implementation without testing effectiveness.

For Android application you  must select : udp broadcast network ( ou ip (

raspivid -ih -t $TIMEOUT -w $WIDTH -h $HEIGHT -fps $FPS -b $BITRATE -n -g $KEYFRAMERATE -pf high -o - |gst-launch-1.0 -v fdsrc ! h264parse ! rtph264pay config-interval=10 pt=96 ! udpsink port=5000 host=
Video for Android application

For a VLC client (http, rtsp) :

## mandatory to run cvlc with root user
strings /usr/bin/vlc|egrep "getppid|geteuid"
C=`strings /usr/bin/vlc|grep -c getppid`
if [ $C -eq 1 ]; then
echo "VLC getppid already set"
cp /usr/bin/vlc /usr/bin/vlc.ori
sed -i 's/geteuid/getppid/' /usr/bin/vlc
strings /usr/bin/vlc|egrep "getppid|geteuid"
#### http
raspivid -ih -t $TIMEOUT -w $WIDTH -h $HEIGHT -fps $FPS -b $BITRATE -n -g $KEYFRAMERATE -pf high -o - |cvlc -vvv stream:///dev/stdin --sout '#standard{access=http,mux=ts,dst=:5000}' :demux=h264
#### rtsp
raspivid -ih -t $TIMEOUT -w $WIDTH -h $HEIGHT -fps $FPS -b $BITRATE -n -g $KEYFRAMERATE -pf high -o - |cvlc -vvv stream:///dev/stdin --sout '#rtp{sdp=rtsp://:5000/}' :demux=h264
video for VLC client

Second solution: Transmission Video Wifibroadcast at 2.3GHz from the drone « MyPiDrone » to Ground Control Station (GCS) and  rebroadcast on the 2.4GHz wireless network using the Access Point to the connected equipment.

This solution uses a TP-LINK (wlan1: monitor mode) on the drone and two TP-LINK (wlan0 AP and wlan1: monitor mode) on the ground control station.

On the drone the transmission of video is in Wifibroadcast (wlan1):

raspivid -ih -t $TIMEOUT -w $WIDTH -h $HEIGHT -fps $FPS -b $BITRATE -n -g $KEYFRAMERATE -pf high -o - | tee $VIDEO | ./tx -p $PORT -b $BLOCK_SIZE -r $FECS -f $PACKET_LENGTH $WLAN
wifibroadcast video

Linux on the ground control station receiving video over Wifibroadcast (wlan1)  and rebroadcast video to Android application connected to the AP (wlan0) :

./rx -p $PORT -b $BLOCK_SIZE -r $FECS -f $PACKET_LENGTH $WLAN |gst-launch-1.0 -v fdsrc ! h264parse ! rtph264pay config-interval=10 pt=96 ! udpsink port=5000 host=
Video streaming for Android application

Or retransmission of video VLC to a client connected to the AP (wlan0) :

./rx -p $PORT -b $BLOCK_SIZE -r $FECS -f $PACKET_LENGTH $WLAN |cvlc -vvv stream:///dev/stdin --sout '#standard{access=http,mux=ts,dst=:5000}' :demux=h264
video streaming for VLC client

NOTE : Instead raspivid you can use picamera. See : Overlaying telemetry text on video before Wifibroadcast