Python RPI VHF Wx satellite recorder

vhf-wx-script.py

# RPi zero RTL-SDR VHF weather satellite recorder
# Mark Pentler 2021 v0.1

from gpiozero import Button #import button from the Pi GPIO library
import time # import time functions
import os #imports OS library for Shutdown control

hold_time = 2
record_button_delay = 1
# define button GPIO pins
noaa15Button = Button(5)
noaa18Button = Button(6)
noaa19Button = Button(13)
meteorm2Button = Button(19)
shutdownButton = Button(26)

while True: # loop

  if noaa15Button.is_pressed: 
    time.sleep(hold_time)
    if noaa15Button.is_pressed: # check if the user let go of the button
      # cmd here
      full_command = “rtl_fm -f 137620000 -M fm -s 40k - | sox -t raw -e signed -c 1 -b 16 -r 40 - test.wav rate 11025”
      process = subprocess.Popen(full_command, stdin=None, stdout=None, stderr=None, close_fds=True)
      time.sleep(record_button_delay) # delay to give time for button to be released
      noaa15Button.wait_for_press() # now wait here for button push to stop recording
      process.kill()

  if noaa18Button.is_pressed: 
    time.sleep(hold_time)
    if noaa18Button.is_pressed:
      full_command = “rtl_fm -f 137912500 -M fm -s 40k - | sox -t raw -e signed -c 1 -b 16 -r 40 - test.wav rate 11025”
      process = subprocess.Popen(full_command, stdin=None, stdout=None, stderr=None, close_fds=True)
      time.sleep(record_button_delay)
      noaa18Button.wait_for_press()
      process.kill()

  if noaa19Button.is_pressed: 
    time.sleep(hold_time)
    if noaa19Button.is_pressed:
      full_command = “rtl_fm -f 137100000 -M fm -s 40k - | sox -t raw -e signed -c 1 -b 16 -r 40 - test.wav rate 11025”
      process = subprocess.Popen(full_command, stdin=None, stdout=None, stderr=None, close_fds=True)
      time.sleep(record_button_delay)
      noaa19Button.wait_for_press()
      process.kill()

  if meteorm2Button.is_pressed: 
    time.sleep(hold_time)
    if meteorm2Button.is_pressed:
      # cmd here
      process = subprocess.Popen(full_command, stdin=None, stdout=None, stderr=None, close_fds=True)
      time.sleep(record_button_delay)
      noaa19Button.wait_for_press()
      process.kill()

  if shutdownButton.is_pressed: 
    time.sleep(hold_time)
    if shutdownButton.is_pressed:
      os.system("shutdown now -h") # shut down the Pi

  time.sleep(1) # delay loop to spare CPU cycles