THth0ma5·Mar 27, 2024
I transmitted this way using a raspberry pi and a basic filter and antenna and was heard one day in New Zealand from Ohio. https://github.com/JamesP6000/WsprryPi
In Broadcasting LoRa packets wihout a radio [video]JamesP6000
WsprryPi
C++2017–2024
JamesP6000 / WsprryPi
WsprryPi
Raspberry Pi WSPR transmitter using NTP based frequency calibration
3Distinct people
3Mentions
0Explicit recommenders
362GitHub stars
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Raspberry Pi WSPR transmitter using NTP based frequency calibration
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Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 PM UTC.
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HN mentions by year3 dated mentions
Observed mentions: 2017-09-21 15:29:31 UTC to 2024-03-27 00:33:15 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2017 | 2017-01-01 00:00:00 UTC | 2018-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2018 | 2018-01-01 00:00:00 UTC | 2019-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2019 | 2019-01-01 00:00:00 UTC | 2020-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
3 sourcesFor a really good time, I suggest https://github.com/JamesP6000/WsprryPi - it is super fun run a signal into a long wire and see it picked up around the world!
(You do need an amateur radio license for this, but in the USA at least the technician one is very easy to get.)
In System Bus Radio: Transmits AM radio on computers without transmitting hardwareYou will need a antenna that is resonant on the frequency you're transmitting on for any hope of the signal leaving the immediate proximity of the Pi. It would also be a very good idea to filter the signal coming out of the Pi to reduce the strength of any frequency spurs accompanying your Pi generated signal and to keep your transmission legal.
This is a pretty good write up of using the Pi as a wspr transmitter: https://github.com/JamesP6000/WsprryPi
In Welcome to the World of Software Defined Radio (2016)