Hi,
There is a writeup with expected images in the repository on how to test a given setup with SDRAngel:
github.com/zsellera/openstint/blob/master/docs/setup-tutorial.md#testing-the-system-so-far
If you can receive signal using SDRAngel, you should be able to do so with the openstint software as well.
If there is no signal visible with sdrangel, try:
1. Can you receive any other signals with your hackrf, like fm-stations?
2. What balun/preamp do you use? It might need power from the built-in bias tee. Verify the voltage requirements, as the HackRF supplies 3.3 V 50 mA max.
3. Verify the transponders transmit. The transponders need 4.5 V minimum to transmit (this is a limitation of the mosfet driver used). The blinking is a good sign btw.
4. If you have access to rc3 or rc4 hybrids, you can give a try to those as well.
Originally Posted by
pikwas
Hello everyone. Project is great but I`m having some troubles to get it working. I ordered transponders from JLCPCB, did compile of hex file under ubuntu next I programmed transponder with stm32 cube programmer via st-link v2. After powering up transponder blinks every second so it`s probably working properly. Next I compiled openstint under ubuntu. Nex I`m putting hackrf one to usb under ubuntu with openstint, connecting balut to hackrf and wire loop with resistor to balun as antenna. One thing which I changed is openstint is "float noise_floor = 10.0f * std::log10(noise_power) - 20.0f * std::log10(ADC_FULL_SCALE);" from log10f to log10 because problems with compiling. Could it be a reason ? I`m running openstint but I`m not getting any passes. How can I debug ? Where to search for problem ? I tried with -a -m -b -l -v parameters but with no success. Here is my output:
:~/openstint/build/src$ ./openstint
Listening on tcp://*:5556
HackRF RX: freq=5000000 Hz, sample_rate=5000000 Hz, LNA=24, VGA=24
HackRF SerNo.: 0000000000000000919068dc35943b1f
Streaming... stop with Ctrl-C
S 5019 -38.499035 2 0 0
S 10029 -38.502296 2 0 0
S 15041 -38.422245 2 0 0
S 20050 -38.551464 2 0 0
S 25060 -38.39564 2 0 0
S 30068 -38.534252 2 0 0
S 35078 -38.495895 2 0 0
S 40089 -38.576733 2 0 0
S 45099 -38.52184 2 0 0
S 50109 -38.53396 2 0 0
S 55118 -38.50404 2 0 0
S 60128 -38.711315 2 0 0
S 65139 -38.455574 2 0 0