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@th0ma5w
Created January 25, 2014 20:21
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A way that I got working of scripting the output of multimon-ng ... not sure why the pipes are weird, but things like tee or grep seem prevent multimon-ng from producing output.
import subprocess, sys
from datetime import datetime
from time import sleep
timestamp = lambda : datetime.now().isoformat()
# # pager_rtl.sh --
# rtl_fm -M fm -f 152.48M -r22050 -s88200 -g 42 -l 30
rtl_fm = subprocess.Popen("./pager_rtl.sh",
stderr=subprocess.PIPE,
stdout=subprocess.PIPE,
shell=True)
#rtl_fm.poll()
#sleep(5)
# # pager_ng.sh --
# multimon-ng -t raw -f alpha -a POCSAG512 -
multimon_ng = subprocess.Popen("./pager_ng.sh",
stdin=rtl_fm.stdout,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
shell=True)
# try / catch hack for ctrl+c,
# there's probably a better way to ensure process stop when finished
try:
while True:
nextline = multimon_ng.stdout.readline()
multimon_ng.poll()
if nextline.__contains__("Alpha:"): # filter out only the alpha
nextline = nextline.split('POCSAG512: Alpha: ')[1]
sys.stdout.write(timestamp() + " " + nextline)
sys.stdout.flush()
except:
pass
rtl_fm.kill()
multimon_ng.kill()
@tedder
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tedder commented Mar 21, 2016

they probably "prevent output" because they get buffered: http://mywiki.wooledge.org/BashFAQ/009

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