Connect geiger with USB FTDI to an OpenWRT router and send data to radmon.org

opkg update
opkg install kmod-usb-serial-ftdi
opkg install minicom coreutils-stty

stty -F /dev/ttyUSB0 speed 9600  cs8 -parenb -cstopb
echo | (stty raw; cat) < /dev/ttyUSB0

root@OpenWrt:~# echo | (stty raw; cat) < /dev/ttyUSB0
22
20
20
18
19
19
19

#!/bin/bash
## by pilovis 2109 Italy - www.49v.com
# main loop (infinite)
while true
do
# CPM reading loop (60 seconds)
while true
do
  # populate a tmp file with CPM data received from USB serial connection, one read per line
  cat /dev/ttyUSB0 > /tmp/received.txt
# send reading loop to background and go further
done &
# count 60 seconds and then stop the CPM reading loop and the serial data reading / file writing
pid=$!
/bin/sleep 60 && kill -TERM $pid; killall cat
/bin/sleep 1
# calculate the mean value of the readings and insert the integer value rounded to the CPM variable
cpm=$(/usr/bin/awk '{ total += $1; count++ } END { print total/count }' /tmp/received.txt | awk '{printf("%.f\n",$0)}')
# OPTIONAL: insert CPM value in a tmp file for other uses (it changes every minute)
/bin/echo $cpm > /tmp/cpm.txt
# send CPM data to radmon.org
/usr/bin/wget -O /dev/null "http://radmon.org/radmon.php?function=submit&user=myuser&password=mypass&value=$cpm&unit=CPM"
# change myuser & mypass in the above line with your radmon login data
/bin/sleep 5
# OPTIONAL: notify alarm if CPM > 50
alarm=50
if [ $cpm -gt $alarm ];
then
   /bin/echo "Alarm CPM = "$cpm > /dev/null 2>&1;
  # put your alarm on script here
  # example:
  #/bin/echo 1 > /sys/class/gpio/gpio1/value # switch on GPIO1 
else
    echo "everything is normal" > /dev/null 2>&1;
  # put your alarm off script here
  # example:
  #/bin/echo 0 > /sys/class/gpio/gpio1/value  # switch off GPIO1
fi;
# wait 10 seconds and then restart main loop
/bin/sleep 10
done

tail -f /tmp/received.txt

tail -f /tmp/cpm.txt

in_file = open("/tmp/cpm.txt", "rt") # open file cpm.txt for reading text data
contents = in_file.read()            # read the entire file into a string variable
in_file.close()                      # close the file
print(contents)
radiation = ("CPM: " + contents.rstrip("\n"))
print(radiation)

sed 's/$/ * .0057/' /tmp/cpm.txt | bc | awk '{printf("%.2f\n", $1)}'

/bin/sed 's/$/ * .0057/' /tmp/cpm.txt | /usr/bin/bc | /usr/bin/awk '{printf("%.2f\n", $1)}' > /tmp/usvh.txt