Video Streaming with MangOH Red?

1

Hello all,

I am wondering if this module is good enough to stream video? I know that signal conditions vary greatly by location and surroundings but, on a good day, what quality of video could it stream?

I am asking because I would like to use it in a drone application.

Thank you in advance,

Best regards,

Chris

2

What wireless link(s) were you hoping to use?

3

I am not sure what you mean (I am not a CS expert)ā€¦ does ā€œ4G LTEā€ answer your question?

All I know is that the Auvidea J90 (Nvidia Tx1 Baseboard) has various ports that can connect to the MangOH Red LTE module. I was hoping to figure out the details once I heard some validation that the concept was feasible.

4

It really dependsā€¦

  1. Is the camera connected to one of the mangOHā€™s hardware interfaces?
  2. Is the video coming out of the camera compressed?
  3. Do you intend to compress the video using the mangOH
  4. What is an acceptable amount of data to transmit. Often times streaming video is avoided for cost reasons rather than technical reasons.
5
  1. The camera will be connected to an Nvidia TX1 (with an Auvidea J90 Baseboard). The TX1 will then send the video footage to the MangOH Red via UART (or however is best.)
    2&3) The nvidia should be able to compress/decode the video into any format/quality.

Please let me know if this seems feasible. I appreciate your help.

Thank you in advance!

Best regards,

Chris

6

Hiya,

I think youā€™re going to be pushing the limits of the WP7702 LTE device.

Technical specs say that max upload speed is just over 300kBytes/sec (LTE CAT-M1).

Iā€™ve done some speed tests (using a cli Speedtest.net client) on the WP7702 in my office (which is about 50m away from the cell tower) on the Telstra network in Australia and could consistently get about 300kByte/sec upload.

Your mileage may vary. The WP7702 is a LTE CAT-M1 device, designed for low volume IoT data. You may also run into trouble with the ISP/Telco throttling the LTE IoT bands so that other devices can use the bandwidth too.

ciao, Dave

7

Hello,

Thank you for the quick reply!

Isnā€™t it possible to change the WP7702 module/chip (on the mangOH Red) for a more powerful module? such as the WP7603?

https://www.sierrawireless.com/products-and-solutions/embedded-solutions/products/wp7603/

Best regards,

Chris

8

Hi @scherzc ,

No problems. Iā€™ll be interested to hear how you get on doing the video streaming.

Yep, you should be able to do that without much trouble. Iā€™ve swapped between the WP8548 and WP7702 numerous times, and have a couple of WP76 sitting on my desk to test - when I get some time!

Just be aware - the mangOH Red Legato sdef may not work out of the box with the WP7603 module - so youā€™ll have to use the stock Legato bundle from legato.io. This means that you probably wonā€™t have (easy) access to any of the devices on the 'Red such as the temperature sensors or multiple I2C buses as they rely on custom kernel modules that are bundled with the WP7702 mangOH Red legato sdef.

Thatā€™s not to say you canā€™t use them - I normally use the 'Red with the stock version of Legato and have my own I/O service that manages access to devices. Itā€™s just a bit trickierā€¦

ciao, Dave

9

Hi,

How you used the cli Speedtest.net? I looked in the internet and thereā€™s a python program to do that, but the mangoh wp7702 doesnā€™t have the libraries to run the program, neither pip to install these libraries. Is there an easy way to test the speed of the internet easily?

Thanks

10

Hiya @hugo_secreto

I found a ā€˜Cā€™ version that I could hack and cross-compile as a stand alone executable on the WP77.

When using the WP77, I also found that I had to manually specify the target server to test against as retrieving the (very large) list of servers and doing the geolocation to select the correct server would always time-out.

ciao, Dave

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