rtlsdr-wsprd Discussions & Announcements

[Guenael]

👋 Hello,

I will try to use Discussions as a place to connect with other radio-amateur to talk about RTL-SDR & WSPR. If you have some ideas of feedback about some missing feature, or some code improvement, this is the place !!

📢 Announce to your community >> I'm working on rtlsdr-ft8d !

You might hate or love FT8, the fact is many people are using it. I love beacon projects, also I will try to glue an FT8 decoder & rtlsdr libs together.
You can find this new project here : https://github.com/Guenael/rtlsdr-ft8d
I will need your help!

[oh1giga]

Hi Guenael,
I have a question about the wsprd.
Is it possible to configure the wsprd to ignore, my not upload to WSPRnet, decodes of my own callsign?
Idea is that I have the wsprd running continuously, and the same node is also periodically transmitting wspr signal on the same band. I would prefer to upload the decodes of my own signal

[Guenael]

@oh1giga : I can include a debugging option to not report any spot on Internet.
#123

But I'm not sure to understand your case. Your not supposed to transmit during your RX slots, or maybe you can have inter-modulation with other band.

[oh1giga]

@VA2GKA, thank you for the reply.
When I use WSJT-X to do both receiving and transmitting, there's no problem. It transmits for example 15% of the time slots, and receives during the remaining 100% - 15% time slots. So no TX and RX at the same time.
But since rtlsdr-wsprd does only receiving, you need another process that does the transmitting.
For example the WsprryPi is a popular WSPR transmitter SW.
But the two processes are not synchronized, in other words to my knowledge there is no way to stop the decodes on the rtlsdr-wsprd when WsprryPi transmits.
And that's ok, nothing bad really happens, but it would be nice to reject the decode, and upload, of my own call during that time slot.

BTW, during the TX slot the RTL-SDR antenna is terminated to GND, so there is no risk of damage to the receiver. But there is still enough signal leakage that the rtlsdr-wsprd decodes my own transmit signal.

[Guenael]

@oh1giga Well, you should be able to use the -n option, to specify only 1 or n records.
This options is actually broken, I will fix it soon.
Another addition could be the number of seconds recorded, by default this is 120 sec, and you will typically miss your next transmission if some sync are required.
I will think about that.

[Guenael]

@oh1giga I fixed the -n option, you can now chain your two process.
Good luck!

[IZ7BOJ]

@oh1giga, As far as I Know, wsprnet rejects spots when the received call/locator and the reporter call/locator are the same. I have built a RX/TX station and the rx part is always active during the tx. I see my call in my local rtlsdr_wsprd log, but not in wsprnet database. By the way, you can see my rx/tx wspr station here: https://iz7boj.wordpress.com/2021/06/02/a-wspr-rx-tx-station-with-web-interface-using-a-raspberry/ I hope this helps. 73' Alfredo Il giorno mar 28 dic 2021 alle 03:07 Guenael, VA2GKA < ***@***.***> ha scritto:

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@oh1giga <https://github.com/oh1giga> Well, you should be able to use the -n option, to specify only 1 or n records. This options is actually broken, I will fix it soon. Another addition could be the number of seconds recorded, by default this is 120 sec, and you will typically miss your next transmission if some sync are required. I will think about that. — Reply to this email directly, view it on GitHub <#39 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AJCWU3UO532Z5Y3F2ZVOQZTUTELWVANCNFSM5JLF7N4A> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[oh1giga]

@IZ7BOJ
Hi Alfredo, yes I have seen your project, and I actually sent you couple questions via your website.
Your setup is very close to what I’m building, and you have provided lot of very good information.
I’m also building a VL3PE amplifier board. But I’m using a BPF between the RPi output and amplifier, not a LPF.
My goal is to keep the amplifier output very clean also below the TX frequency, so that it doesn’t add noise to my other HF receivers (antennas are close to each other)
I’m also looking for way to control a relay board to choose amplifier output LPF filters to transmit on different bands.

Mikko