Saturday 16 October 2021

SDR++ on Jetson Nano


 

I compiled and installed SDR++ on my Nvidia Jetson Nano :)

How does it compare to say GQRX. I think SDR++ runs faster, has a few more options which are familiar to SDR# users. One feature I like with SDR++ compared to GQRX are the gain options for my Airspy Mini - it has Sensitive/Linear/Free whereas GQRX only has Free.

I also like the Module Manager is SDR++ which allows for the addition of extra functionality such as Meteor decoding, Gpredict integration.

More info: https://github.com/AlexandreRouma/SDRPlusPlus/issues/446

Jetson stats seem favourable:


Friday 15 October 2021

Autonomous Satellite Tracker & Decoder




 Hi there, I would like to share with you my Satellite tracker and Decoder.

I am using: 

Nvidia Jetson Nano with latest JetPack 4.6 - (https://developer.nvidia.com/embedded/jetson-developer-kits)
DIY Antenna Rotator - (https://wiki.satnogs.org/SatNOGS_Arduino_Uno/CNC_Shield_Based_Rotator_Controller)
GPredict - (http://gpredict.oz9aec.net/)
SatDump - (https://github.com/altillimity/SatDump)
Airspymini SDR - (https://airspy.com/airspy-mini/)

Here are some samples from my setup:

 live decoding testing with Satdump on Jetson Nano

 building my rotator

 all hooked up and ready for testing

Once we are successful with the rotator it is time to exercise while it does it's thing :)

A few other photos and things from my build


testing gpredict with rotator


gpredict tracking

 
Meteor-M2 capture - October 2021

 
FY-3B

 
Jetson Nano Case + USB hub

 
My Airspymini goodness

 
I even made an oled

Couple of videos showing rotator function:


Thanks for reading :)

Tuesday 12 October 2021

International Space Station Broadcast 12th October 2021

 Today I was able to capture audio broadcasting from the iss.


Thursday 7 October 2021

ibus2ppm



how i wire it up

I found time to try Povl's ibus2ppm code with my old APM 2.8 flight controller today. It works! 

if you want to use ibus with your old APM board, you can have all 10 channels functioning on your flysky i6 transmitter. 

-Flash your flysky i6 with 10ch mod
-Use a flysky receiver with ibus out port
-Flash ibus2ppm code to an Arduino pro mini
-Solder and connect the wires as shown in the diagram

Hey Presto!

-You have 8 channels to the APM board
-You have 2 extra PWM channels on ia6b receiver at port 5 & 6 for other things such as gimbal etc

showing the radio stick movements in APMplanner after hooking it all up

Thumb action on the flysky i6 flashed with 10ch firmware - notice timer and rssi

Powered up :)

I think It is also possible to directly flash the APM 2.8 flight controller 32u2 chip with a sbus .hex code to also use the flysky i6 transmitter in sbus mode. There is talk that sbus is just reversed ibus. I will try this test also soon.

Of course, if you use Pixhawk with Copter Version 4.0 or above you already have ibus connection directly, but if you have an APM board laying around you can still have options.