https://github.com/JamesP6000/WsprryPi/blob/master/BUILD

Install required packages:
  sudo apt-get install git g++ make grep mawk ntp

Make sure you are using the latest kernel by updating your system. The latest
kernel includes fixes wich improve NTP ppm measurement accuracy:
  sudo apt-get update
  sudo apt-get dist-upgrade

Get code/ compile:
  rm -rf WsprryPi (pour effacer le répertoire existant)
  git clone https://github.com/JamesP6000/WsprryPi.git
  cd WsprryPi
  make
  sudo make install (Install to /usr/local/bin:)
  

Uninstall:
  sudo make uninstall

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sudo wspr --repeat -x 3  ON4MS JO20 33 14100000
WSPR packet contents:
  Callsign: ON4MS
  Locator:  JO20
  Power:    33 dBm
Requested TX frequencies:
  14.100000 MHz
Extra options:
  ntp_adjtime() will be used to peridocially calibrate the transmission frequency
  TX will stop after 3 transmissions.

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