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RPiks / pico-WSPR-tx

WSPR beacon for Raspberry Pi Pico, based on pico-hf-oscillator library. It doesn't require any hardware - Pico board itself only.
MIT License
100 stars 10 forks source link

Broadcast synronized by internal RTC #11

Open Jochen-bit opened 4 months ago

Jochen-bit commented 4 months ago

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 commented 4 months ago

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.

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 commented 4 months ago

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

Jochen-bit commented 4 months ago

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'