Wspr code. Jan 22, 2026 · Exploring the capabiliti...

Wspr code. Jan 22, 2026 · Exploring the capabilities of modern radio technology, this article examines the use of the Si5351 and ESP32 to transmit WSPR signals globally, showcasing how these components can be integrated for effective communication. Mar 17, 2025 · WSPR (short for Weak Signal Propagation Reporter) is an amateur radio beacon protocol. Transmitter automatically does SNTP time sync, sufficient for WSPR transmission. 5281/zenodo About WSPR WSPR, “Weak Signal Propagation Reporter,” is a protocol for low-power, digital communication on amateur radio frequencies. Overview WSPR (pronounced "whisper") stands for “Weak Signal Propagation Reporter. WSJT-X Version 2. Kudos to @NT7S for the comprehensive Si5351 code; I started with his Arduino library (that I previously contributed to) and pared it back down to C for inclusion in the ESP-IDF project. WSPR, which stands for Weak Signal Propagation Reporter, is a program used to test the propagation paths of RF signals between amateur radio operators using a narrowband digital transmission protocol called MEPT_JT on the HF and MF frequency bands. A simple and easy WiFi-enabled ESP8266-powered WSPR, FT8, and FT4 beacon system which uses NTP + DS3231 RTC for timing. The DSP code as written does not know what to do with a positive SNR signal 3. In my experience anything reported as -10 or larger is a suspect SNR. The 11 meter band is used by both CB radio, as well as freeband unlicensed hobbyists, Church radio broadcasts in Ireland and elsewhere in Europe, the military, for studio-to-transmitter links (STLs), data links, buoys, fishnet tracking systems, pagers and other non-voice purposes. JT9 was developed after JT65 5. * The first thing you'll need to do, is find these two lines in the sketch. QMX+ also incorporates standalone CW, FSKCW and WSPR beacon functionality (no PC connection required). I worked through it because I was interested in the theory and maths. Theory of the WSPR Protocol This section is the theory of how WSPR works. In MEPT transmissions, the radio becomes a beacon that transmits for just under 2 minutes, transmitting callsign, locator and power information. WSPR (Weak Signal Propagation Reporter) is a protocol for weak-signal radio communication. This code Utilizes an Si5351 for signal generation, and a GPS for timing & Maidenhead location computation. The WSPR protocol was designed for probing potential propagation paths using low-power transmissions. They use nearly identical message structure and source encoding. * Next, make sure that the encoder switch's "CLK" pin is connected to your UNO's digital pin 2. It is a computer program used for weak-signal radio communication between amateur radio operators. About Ham Radio WSPR Beacon running on an Arduino. WSPR is a digital radio communication protocol designed for weak signal transmission. The WSPR Laboratory (pronounced “whisper”) models, designs, builds, and validates technology that protects users, systems, and networks from malicious and privacy-infringing acts. In case you want to do things manually, there is now a new method called set_freq_manual () (see below for details). This can be used directly for producing transmission sequences for the Arduino/AD9851 based transmitter below, or as a library to encode the WSPR protocol. - ast/wsprd The compound callsign/6 digit locator algorithms were derived from FORTRAN and C++ programs found in K1JT’s WSPR source code. Contribute to eicket/myWSJTEncoder development by creating an account on GitHub. - alexranald A large-scale beacon project is underway using the WSPR transmission scheme included with the WSJT software suite. Morse code, sent by way of CW, engages… Arduino based WSPR Transmitter. Updated at Jenuary 2017. In your old code, you can delete the 2nd parameter in set_freq (), which was the PLL frequency. It is an enhanced edition of the excellent WSJT-X software by Joe Taylor K1JT, Steve Franke… Flow makes writing quick and clear with seamless voice dictation. Q65 Material Needed to Replicate the 100mw Transmitter shown in the YouTube Video - jmharvey1/100mw-WSPR-Transmitter These are signals used by and sometimes created by amateur radio enthusiasts and operators, including many experimental digital modes. Transmissions encode a station’s callsign, location (grid square), and transmitter power into a frequency-shift-keyed (FSK) signal that hops between 4 frequencies to send 162 tones in just under two minutes. Used to display the straight-key transmission sequence for If non-blank, show only those spots involving the specified call Program for decoding FT8, FT4, JT65 and WSPR with Software Defined Radio receivers (SDR) and sending spots to spotting networks such as Reverse Beacon Network, PSKReporter and WSPRNet. Signal above Threshold = WSPR Spot SNR + WSPR Threshold - Mode Threshold + Transmitter Power - WSPR Spot Power + Antenna gain - WSPR Antenna gain Mark Hughes, GM4ISM, has written and published macro code in a Microsoft Excel spreadsheet 3 that retrieves a user specified subset of data from the WSPRnet. 10 Milliwatt Si5351A WSPR Beacon. 47 3B 86 EB 92 77 80 Transmission Spectrogram Wspr Exporter The Wspr Exporter allows you to easily download large chunks of the wspr database filtered by some simple parameters. * int S [162]; * int D [162]; * and change their variable types from "int" to "byte" * This will "free up" some SRAM and will allow the UNO run stably. Learn how to use WSPR 3. WSPR 4 is not a two-way communications mode, but a Beacon mode. ” The WSPR software is designed for probing potential radio propagation paths using low-power beacon-like transmissions. WSPR is a very weak signal digital mode protocol that uses very little bandwidth, but is not suitable for conversations. It is rarely used to Multiband WSPR transceiver Multiband FT8 transceiver Pulsed NMR system Multichannel Pulse Height Analyzer Scanning system Vector Network Analyzer Applications for Red Pitaya STEMlab 122. Power is in dBm. The loosely coordinated beacon transmitters and receivers, collectively known as the WSPRnet, report the real-time propagation characteristics of a number of frequency bands and geographical locations via the Internet. It is a protocol, implemented in a computer program, used for weak- signal radio communication between amateur radio operators. It is the fastest, smartest way to type with your voice. 17:21:32 PM: /Attempting to upload 2 QSOs 17:21:33 PM: /C:\Program Files\LogsAreUs\LotWUpload. It is also a WiFi-enabled VFO, which is quite useful, and convenient for radio experimentation work. WSPR (pronounced “whisper”) stands for Weak Signal Propagation Reporter. The WSJT project implements software for amateur radio communication using state-of-the-art digital techniques. I first tried WSPR out in 2009, with a Signalink USB interface attached to my FT-817 and PC. It is designed to act as an incredibly weak signal beacon, used for examining amateur band conditions. Data is fed sequentially into the left-most shift register, and, for a rate = 1⁄2 code, the output stream consists of 2 bits for each shift – c0 and c1 (code symbols) WSPR (pronounced "whisper") stands for "Weak Signal Propagation Reporter". It utilizes 2 minute long transmission times and provides callsign, location, and power information. However, to generate symbold stream for other modes like js65,jt4,jt8 you will need command-line utilities jt65code, jt4code, jt9code. The first seven are designed for making reliable QSOs under weak-signal conditions. WSPR is designed to be a highly efficient way of transmitting and receiving information over long distances, even under challenging radio propagation conditions. INC file for direct importation into PIC microcontroller code of the WSPR symbols for any given source message. The “Weak Signal”-part refers to signals being transmitted with a maximum power of 5 Watt (37 dBm), what still is regarded as QRP. The definitive guide to WSPR Weak Signal Propagation Reporter (WSPR, pronounced:” whisper”) is a protocol developed by John Taylor, K1JT in 2008. Such communications are normally done on the shortwave amateur radio bands in modes such as PSK31, MFSK, RTTY, Olivia, and CW (Morse code). Modulation is by narrow-band FSK. The WSPR Coding Process I wanted a simple way of generating the symbols for programming into a WSPR beacon source consisting of a PIC microcontroller and DDS frequency generator. WSPR (pronounced "whisper") stands for "Weak Signal Propagation Reporter". WSPR / FT4 / FT8 encoder and audio generator. The compound callsign/6 digit locator algorithms were derived from FORTRAN and C++ programs found in K1JT’s WSPR source code. ADI: Log uploaded successfully with result "File queued for processing"! The WSPR beacon message in defined directly in the code in text form. This guide covers setup, operation, and system requirements. If you use this code for your research, please cite the works from which the code is derived where possible (ask if you are unsure). Increasingly, the software is also being used for data on VHF and UHF frequencies using faster modes such as 8-PSK. GitHub Gist: instantly share code, notes, and snippets. The Kiwi also includes a software-defined GPS receiver used to calibrate the SDR frequency and obtainin time-of-day. Download WSJT for free. org. Note: The whole The code simply takes my callsign, grid square, and transmit power, encodes it into a WSPR message, and tells the Si5351 to send the sequence of four different FSK tones that make up the 162 WSPR (Weak Signal Propagation Reporter) Stand Alone Beacon: Hello community - Dave here (radio callsign G7IYK), I have very pleased to publish details of my latest project which is a WSPR or Weak Signal Propagation Reporter beacon. Implementation By studying and modifying the C code (and in the process having to learn and getting to quite like the C language) I managed to write software that generates a . Frequencies 17:21:32 PM: /Warning: Your custom mode map WSPR conflicts with the standard mode definition for WSPR and was deleted. Narrow DSP filtering and coding increases low signal reception by another 8 db. There are four main tools currently available within the WSPR Scheduler suite of apps: 1) the WSPR Scheduler includes encoding software to transmit a WSPR signal within each timeslot & a decoder to receive & display received WSPR QRPGuys EZ WSPR Pi QRPGuys KD1JV Code Trainer QRPGuys LA3ZA Zero Beat Indicator QRPGuys Micro 40-15m EFHW Tuner/Antenna QRPGuys Mini 80m-10m No Tune End Fed Half Wave Antenna QRPGuys Multi-DC 10/12/15m CW Transceiver QRPGuys Pacificon DSB/CW Transceiver Kit QRPGuys Portable 40/30/20m Tri-Band Vertical Antenna QRPGuys Portable 80/60m Vertical . WSPR Scheduler is an app that allows WSPR timeslots to be scheduled. This program implements transmitting and receiving functions for a digital soundcard mode called "MEPT_JT", or simply "the WSPR mode". Data is fed sequentially into the left-most shift register, and, for a rate = 1⁄2 code, the output stream consists of 2 bits for each shift – c0 and c1 (code symbols) WSPR (short for Weak Signal Propagation Reporter) is an amateur radio beacon protocol. Experimental feature: GPS module instead of DS3231. It is available in WSJT and WSJT-X. Similar Approaches There is a very similar site for the WSPR protocol called WSPRnet. Currently only simple callsigns and 4-symbol locators are accepted. WSPR Scheduling application with automatic antenna selection. WSPR (Weak Signal Propagation Reporter) Stand Alone Beacon: Hello community - Dave here (radio callsign G7IYK), I have very pleased to publish details of my latest project which is a WSPR or Weak Signal Propagation Reporter beacon. 88-16 SDR and SDRlab 122-16: SDR receiver SDR transceiver SDR transceiver compatible with HPSDR SDR receiver compatible with HPSDR Multiband WSPR transceiver Download WSPR Scheduler for free. WSPR (pronounced "whisper") is an acronym for Weak Signal Propagation Reporter. For anyone interested in QRP and QRPp, the process of being able to decode a signal that is up to about 34dB below the noise level is quite fascinating. org online database. You do not need to understand any of this in order to make a WSPR transmitter. WSPR Weak Signal Propagation Reporter WSPR (usually pronounced “whisper”) is a software application that uses the transmission mode MEPT-JT (Manned Experimental Propagation Transmitter – Joe Taylor). WSJT-X_IMPROVED is published by Uwe Risse, DG2YCB. But you can use much less Contribute to benmarten/wspr-tracker development by creating an account on GitHub. QMX+ shares most of its schematic, features and performance with QMX. 11 meters is often defined as 25-28 MHz / 25000-28000 kHz or 26-28 MHz / 26000-28000 kHz. JT65 was designed for EME (“moonbounce”) on VHF and higher bands and is mostly used for that purpose today. The most popular is the integrated WSPR decoder and Time Difference of Arrival (TDoA) signal direction finder. 6 offers eleven different protocols or modes: FST4, FT4, FT8, JT4, JT9, JT65, Q65, MSK144, WSPR, FST4W, and Echo. It’s one of the many protocols used by radio amateurs but WSPR is a special one. Also, checkout our cost-effective, and robust HF 5W PA system. P. 0 for weak signal propagation reporting. Portions of the WSPR message algorithm were influenced by the work of Andy Talbot, G4JNT. In addition, please cite this code repository as: Title: ‘MAGCODE: framework of models for calculating magnetic fields and interactions’ Author: William S. WSPR messages normally carry the transmitting station’s callsign, grid locator, and transmitter power in dBm, and they can be decoded at signal-to-noise ABC offers world-class shopping, dining, and entertainment experiences in Lebanon. Source Code for AD9851 Simple WSPR Transmitter You’ll need to generate your own data, as detailed in the text. You can find plenty of these signals in amateur frequency bands. Those two changes should cover nearly all upgrade scenarios, unless you were doing some lower-level use of the Si5351. WSPR uses frequency-shift keying and forward error correction to reliably send data tens or thousands of miles with just a few milliwatts of power. The “Constraint Length” of the code K is equal to the number of shift registers + The “Rate” of the code r is the number of incoming data bits per output bit. Portions of the GPS receive code were derived from Igor Gonzalez Martin’s Arduino tutorial. Contribute to zleffke/arduino_wspr development by creating an account on GitHub. Weak signal ham radio communication. Robertson DOI for the repository: 10. Minimal WSPR transmit with Arduino and Si5351 Intrigued by the ZachTek pocket WSPR transmitter Peter, VK3YE, has reviewed, I wondered if I could get a simple beacon going using just an Arduino, an Si5351 clock generator and (you'll be pleased to hear) a low pass filter. WSPR GoogleEarth Visualizer This service allows you to add real time spots to Google Earth. WSPR (usually pronounced “whisper”) is a software application that uses the transmission mode MEPT-JT (Manned Experimental Propagation Transmitter – Joe Taylor). Typical applications involve "DXing" at LF, MF, HF, and VHF+ frequencies, including meteor scatter and EME ("moonbounce"). e7rszk, nrb3, fntq, m2pq, vduy, iqjy, kh8kq, btdps, pugmq, zc2gd,