Broadcast synronized by internal RTC

[Jochen-bit]

Hey guys ;-),
I have implemented a synchronization with the Pico internal RTC in a fork of Roman's ingenious pi pico wspr project:
https://github.com/Jochen-bit/pico-WSPR-tx
All you have to do is start the first broadcast via a button at the beginning of a valid wspr broadcast window, then the following broadcasts are automatically activated, e.g. every 4 minutes. I have had my beacon in operation for over 24 hours without leaving the valid time windows.

True to Roman's motto: "It doesn't require any hardware - Pico board itself only."
Now also automatically repeating transmission!!!

Best regards,
DG7JH Jochen

[bradshawlupton]

very impressive, thank you. I experimented and found that plugging in the usb power 6 seconds early of the even minute kicks it off spelenidily. Bradshaw k1TE. Buzzards Bay, MA P.S. The timing can be observed with the rtlsdr-wsprd DT column and fine tune adjusted afer 24 and 48 hours. I have a 20C and 40C temperature test foam box to look for RTC temperature effects. I wish to work in an unheated garage attic near Boston, MA, USA, where it easily goes from 0 F to 140 F over the year. Sent with Proton Mail secure email.

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On Friday, February 16th, 2024 at 2:01 PM, Jochen-bit ***@***.***> wrote: Hey guys ;-), I have implemented a synchronization with the Pico internal RTC in a fork of Roman's ingenious pi pico wspr project. All you have to do is start the first broadcast via a button at the beginning of a valid wspr broadcast window, then the following broadcasts are automatically activated, e.g. every 4 minutes. I have had my beacon in operation for over 24 hours without leaving the valid time windows. True to Roman's motto: "It doesn't require any hardware - Pico board itself only." Now also automatically repeating transmission!!! Best regards, DG7JH Jochen — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you are subscribed to this thread.

[rowi-net]

Dumb question, Jochen, where do I find your version?

[Jochen-bit]

No problem Rolf, just go to https://github.com/Jochen-bit/pico-WSPR-tx

for every github project you are logged in, is on the right upper section a drop down list called 'fork'