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

Sinamics

It seems strange that you get v412src error. gStreamer is probably not installed correctly.
I can log into your RPI and have a look if you want. I just sent you a PM.

Sinamics

It seems to be working now, there were two instances of gstreamer running, and that was probably the reason for this error.

playfieldofangels

I`d like to thank Bernt for his great help offered me!
He even tooke control of my RPi and check-correct my setup.

Today i received my Huawei USB and hopefully tomorrow i will have a sim card.
New RPi2 on its way also.

I will post here for the outcome.

Thank you

playfieldofangels

Something as a warning.
The specific dongle is not compatible with RPi.

http://www.ebay.co.uk/itm/301594257283

Sinamics

I recevied Huawei E3276 4G LTE Cat. 4 Modem today, and this one is working, but i had to use wvdial or sakis.
I will create complete installation file and upload to gitHub. I`ll keep you all updated..

playfieldofangels

Thank you !

Chuckster1

Hello again!
I'm making great progress on everything. I have gstreamer working. I have Dynamic Update Client (DUC from noip installed on my laptop) pointing my host name xxxxxlaptop.ddns.net to whatever IP my laptop is using. I put this in the gstreamer.sh file (ip=xxxxxlaptop.ddns.net ), and am able to stream video to my laptop on my local network(yes I did have to open port 5000 on my router)

My RPI is using a Verizon jetpack(mobile hotspot), going to a wifi dongle, and this all works, with my laptop having the alias (xxxxxlaptop.ddns.net). However, when I change the laptop to the mobile hotspot created by my Samsung Galaxy S5 (and refresh my Dynamic Update Client to reflect the new IP) it doesn't work. The only difference I can see, and that I did not configure any kind of port forwarding on my mobile hotspot. Can anyone tell me how to make this work?

Sinamics

Hi
I'm glad you're making progress. You will have to open port 5000, correct, I will update my blogg with that information,

Cell operators are normally using a NAT APN for cell phones, which restricts users from open ports. At least this what my operator does.
Im using 4G mobile broadband router for GCS with public APN, this gives me fully open IP without any firewalls.

Maybe other users can shead some lights about this subject on how other countries / operators handles this.

Chuckster1

Hello all.

I've decided to try a Verizon 4g dongle (USB551L) in my RPI. It is recognized with lsusb, and .ls /dev/ shows cdc-wdm0 and ifconfig shows WWAN0. I followed the whole guide (J-son uqmi,etc) and got no errors.

When I try network register, it says "no effect"

When I try -d /dev/cdc-wdm0 --start-network "VZWINTERNET" , it says 29031216 (This is the only thing that seems to work...I'm not sure what the number is???
but if i put something else in besides VZWINTERNET, I get "call failed"

When I try dhclient -v wwan0 it says sending on socket fallback/tries several DHCHDISCOVERS/ no DHCPOFFERS received/ no working leases
Any suggestions?

Sinamics

Exactly same happend to me when tested Huawei 3276 . UQMI works great with ZTE MF821D .
Seems like UQMI is not supported by all dongles. I used wvdial to establish connection, but i belive this is just 3G.

I will write write a article explaining wvdial configuration.
It would be nice if someone out there know a workaround using UQMI.

Chuckster1

I ordered thethe Hauwei 303 (supposedly works right out of the box according to this website:-))
Only $20 on Amazon , why not.;-)

http://elinux.org/RPi_VerifiedPeripherals#USB_3G_Dongles

image 2125458052557750581f28c719456398.jpeg

playfieldofangels

O no i just see the post.
So Huawei 3276 not working? This is going to be my 3d dongle i will order.. :-)

Chuckster1 can you please give us an update if working when you receive yours?
Thx

Sinamics

Hi there.
Huawei 3276 is working 🙂

but not using UQMI . You will have to use wvdial or sakis3g .

playfieldofangels

Haha thank you Bernt!
Does support 4G this way? I think i will receive mine this week.

Sinamics

To be honnest, i really dont know if wvdial supports LTE but i guess not.
Im currently using Huawei 3276 in my plane and it works great, I will try to do an speed test later to see max download / upload speed with LTE coverage.

Chuckster1

I found this interesting article on the internet.
http://www.g7smy.co.uk/?p=505

Also, I think I screwed up by ordering a 3g card when I think I need a 4g. I'm going to try the ZTE mf823. I found 1 on Ebay for $30. I'll let you guys know, but shipping could be a while.
Still going to try to get my Verizon dongle working meantime, as it seems to be recognized by the RPI.

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Chuckster1

Hi.
Everything was working fine with gstreamer. I clicked on my gstreamer.sh file and successfully streamed to my laptop. Then, I tried to add it to the startup script:

sudo cp /home/pi/gstreamer.sh /etc/init.d/
sudo update-rc.d gstreamer.sh defaults

It appears like gstreamer is starting (webcam lights up) but does not stream to my laptop (remember, I had it working fine, until I typed these lines.) Now, my webcam lights up (no streaming or wifi adapter activity).
When I try the gstreamer.sh file now, it doesn't work:-((I think maybe 2 instances of gstreamer are running at that point?)

Sinamics

Hi
To see if gstreamer is running you could type

ps ax

This will list out all the processes runnning.
You could try to add the gstreamer to rc.local and see if that makes any diffrences.
To remove gstreamer from rc-d type this command

update-rc.d remove gstreamer.sh

Then edit rc.local

nano /etc/rc.local

add the gstreamer script just before the exit0

sudo sh /home/pi/gstreamer.sh &

Chuckster1

Greetings.

Gstreamer is still doing the same thing either way. I think it is starting up too early. Is there a way to delay this? If I cant get anything to work, I will probably assign a GPIO pin and push a button to start it.

Also, udp_redirect is working perfectly, but only on my local network. When I change redirect script to xxxxlaptop.ddns.net address, it does not work. I know my ddns.net address is good, because gstreamer doesn't have a problem streaming to it. Do I have to change any settings in uart module? I'm using a wifi hotspot and configured port forwarding for port 14550 on both ends. Any ideas?

Sinamics

You can delay gstreamer script, simply put this delay line in top after #!/bin/bash of the gstreamer.sh.

sleep 10

change the number(Seconds) to your needs.
could you post the content of the udp_redirect file, You dont need to change any settings on UART module.
Remember to use the qoutes before dig and after your Dyndns
You also need to install dnsutils to make use of the dig +short. apt-get install dnsutils

#!/bin/bash
ip=`dig +short YOUR_GCS_DNS`
echo $ip
/home/pi/udp_redirect 0.0.0.0 14550 $ip 14550 &

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