[HOWTO] RPI & Pixhawk with 4g Cell, Video & Telemetry

parthpparikh

Hi Bernt,
I did as you adviced. However, the log turns out to be an empty file. But the inadyn status command still returns running.
I do not know what to make of it. Does this mean the inadyn is working correctly, but just an error with the log or is it possible that the inadyn is configured incorrectly? Also, another important question I have is, I am using the same DynDns details on the Tegra as I had used on a Raspberry Pi when trying out this tutorial.

Now that I have moved to the Tegra; I do not use the Raspberry Pi anymore, but it still has the "inadyn.conf" file. Will that affect the functioning of inadyn on the Tegra?

Parth

HJ_Koster

Hi Bernt,

What about using mavproxy on RPi to proxy serial pixhawk data to the groundstation? Anyone working on that? Greetz Rik

Sinamics

Hi
Yes i have tried that, and it works. The only issue is Mavproxy uses allot of Rpi CPU which could cause less stabillity in video and so on.
Running simple udp_redirect script will not affect CPU in the same way as mavproxy.

Jesus_Martin_Sanchez

Hello all again!
After months of travel I´m re-starting this project again, with objective of finish it! :-) Right now, how my No-ip hosts expired
I´ve done it again and my first objective is test the DynDNS again, I obtain the image attached, do you think is correct?

image 266444642560aef93b08ca169162620.jpeg

Thanks!

samisin

Hi everybody ,
It is couple of days I am trying to make Unlock Huawei E3276s-150 up and running.
None of sakis3g or qmi worked. sakis3g fails to load tty and uqmi can'f find the wwan0 device because it didn't created .

When check ifconfig I see wvna0 is there and created :

wwan0  Link encap:Ethernet  HWaddr 0c:5b:8f:27:9a:64
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:198 errors:0 dropped:0 overruns:0 carrier:0 
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B)  TX bytes:20280 (19.8 KiB)

and lsusb

Bus 001 Device 007: ID 12d1:1506 Huawei Technologies Co., Ltd. E398 LTE/UMTS/GSM Modem/Networkcard

any ideas what is going on here ? thanks

mattiao

Hi Bernt,
following your instruction, the streamer was working very well inside my LAN using the port 9000. But when I try to connect the raspberry with the cellular adapter and stream to a laptop using its public IP and port 9000, I don't receive any streaming. Any idea to help me?

Thanks and best regards.

Sinamics

@mattiao there could be several reasons for this. Is your laptop behind any firewall? if so, you will need to open port 9000.

mattiao

Bernt, I have tried to disable the Windows Firewall, but nothing changes...
What else can be?

Sinamics

I can log on to your RPI and have a look if you want?

I`ll send you a PM.

mattiao

Thanks to @Sinamics, we have solved the problem:
in Italy Vodafone SIM have all the ports closed by default, changing the SIM with a business one and using M2Mbis.vodafone.it as APN did solve the problem!

Djan_Vastra_Blomst

Hi @Sinamics
Amazing project you've come up with here! Im trying my best to build one of my own
however I've run into some trouble when I'm trying to stream to Gstreamer on windows. It works ok on VLC, but theres that 3-4 sec latency..

So I wanted to try out Gstreamer, because I read some place that it would reduce the latency to 0.5 sec..
Do you think you could help me figure out what I'm doing wrong? This is my batch script:

@echo oncd C:\gstreamer\1.0\x86_64\bingst-launch-1.0 -v udpsrc port="5000" caps="application/x-rtp,media=
(string)video,clock-rate=(int)90000,encoding-name=(string)H264,payload=(int)96,ssrc=(uint)237526004,
clock-base=(uint)1584170994,seqnum-base=(uint)42626" ! rtph264depay ! 
decodebin!autovideosink -vpause

and this is the error I get:

C:\gstreamer\1.0\x86_64\bin>gst-launch-1.0 -v udpsrc port="5000" caps="application/x-rtp", media=
(string)video,WARNING: erroneous pipeline: could not set property "caps" in element "udpsrc0"to 
"application/x-rtp,"

Best regards,
Djan

Sinamics

Hi Djan and welcome.
gStreamer should produce less latency than VLC. Try the pipeline bellow and revert with the results.
This is the code im currently using myself.

gst-launch-1.0 -e -v udpsrc port=5000 ! application/x-rtp, payload=96 ! rtpjitterbuffer ! rtph264depay 
! avdec_h264 ! fpsdisplaysink sync=false text-overlay=false
And on the RPI, im using ;  (PiCam)
raspivid -n -w 1280 -h 720 -b 1000000 -fps 15 -t 0 -o - | \
    gst-launch-1.0 -v \
    fdsrc !  \
    h264parse ! \
    rtph264pay config-interval=10 pt=96 ! \
    udpsink host=10.0.0.225 port=5000

Djan_Vastra_Blomst

Hi again 🙂 n thanks!
I tried with this batch:

@echo on 
cd C:\gstreamer\1.0\x86_64\bingst-launch-1.0 -e -v udpsrc port=5000 ! application/x-rtp, payload=96 ! rtpjitterbuffer !
rtph264depay ! avdec_h264 ! fpsdisplaysink sync=false text-overlay=false 
pause

I think I missed installing something - I get this error now

C:\gstreamer\1.0\x86_64\bin>gst-launch-1.0 -e -v udpsrc port=5000 ! application/x-rtp, payload=96 ! rtpjitterbuffer ! rtph264depay ! avdec_h264 ! fpsdisplaysink sync=false text-overlay=false
WARNING: erroneous pipeline: no element "avdec_h264"

I tried googling for avdec_h264, but didnt come up with anything satisfying.
Br, Djan

Djan_Vastra_Blomst

I got further 🙂
found this thread which explained i needed to tick everything off when I installed Gstreamer SDK.( https://www.raspberrypi.org/forums/viewtopic.php?p=491075 )

Now I get the Batch running, but no window with cam stream opens? This is the message from cmd:

C:\gstreamer\1.0\x86_64\bin>gst-launch-1.0 -e -v udpsrc port=5000 ! application/x-rtp, payload=96 ! rtpjitterbuffer ! rtph264depay ! avdec_h264 ! fpsdisplaysink sync=false text-overlay=false
Setting pipeline to PAUSED 

.../GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstAutoVideoSink:fps-display-video_sink/GstD3DVideoSink:fps-display-video_sink-actual-sink-d3dvideo: sync = false
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock

Can you tell me why the stream doesnt open? I allowed it when Windows Firewall popped up. 🙂
Br.

Sinamics

Hi
When you installing gstreamer for windows, select all plugins. I think you are missing the h264 part.

image 7413885485679567cef109017990806.png

Djan_Vastra_Blomst

Hehe thanks.
I did so, it seems to work without errors now - but I dont get any streaming window open..?
My cmd:

C:\gstreamer\1.0\x86_64\bin>gst-launch-1.0 -e -v udpsrc port=5000 ! application/x-rtp, payload=96 ! rtpjitterbuffer !
rtph264depay ! avdec_h264 ! fpsdisplaysink sync=false text-overlay=false

Setting pipeline to PAUSED .../GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstAutoVideoSink:fps
display-video_sink/GstD3DVideoSink:fps-display-video_sink-actual-sink-d3dvideo: sync = false

Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock

Sinamics

Are you streaming with correct IP and port?
If VLC works , it should work with gstreamer also. You could try to start gstreamer on windows berfore RPI. Could you please post your RPI pipeline?

Djan_Vastra_Blomst

By 'pipeline' - I take it you mean the script on the RPI 🙂
Its like this :

#!/bin/bash 
raspivid -n -w 1280 -h 720 -b 1000000 -fps 15 -t 0 -o | \ 
gst-launch-1.0 -v \ fdsrc ! \ h264parse ! \ rtph264pay config-interval=10 pt=96 !
 \ udpsink host=192.168.0.100 port=5000

I also checked my Lan IP and it is correct.

Sinamics

are you able to retrive video using VLC with the above code?
everything seems correct to me.

Djan_Vastra_Blomst

I am unsure of how I make a file with this script for VLC - just paste it to an edit of the vlc.sdp or ?

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