Python script and pocsag?

[sa7bnb]

Hi, Trying to get a pocsag doorbell to my house. but I do not really succeed? Is there anyone who can explain why my python script does not work. Sorry if I post this in the wrong place! Regards Anders SA7BNB - Sweden

from time import sleep import RPi.GPIO as GPIO import time import os

GPIO.setwarnings(False) GPIO.setmode(GPIO.BCM) GPIO.setup(20, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)

while True:

if GPIO.input(20):
    sleep(0.5)
    os.chdir("/home/pi/rpitx")
    os.system('sudo ./rpitx "1234567:Doorbell!" sudo ./pocsag -f 434.000e6')
    time.sleep(110)

[VasylSamoilov]

it should be something like: sudo printf "$ID:$MESSAGE" | ./pocsag -f $FREQUENCY -r $BAUDRATE -b $FBIT example printf "1234567:Doorbell!" | ./pocsag -f 434000000 -r 1200 -b 0

[sa7bnb]

Solved it like this :-) Sadly, the raspberry pi computer is not stable on this high frequency, so the temperatures cause the frequency to change slightly all the time. ;-( Otherwise my solution worked!

This py-file to autostart on th pi

#!/usr/bin/python import RPi.GPIO as GPIO import os from time import sleep

GPIO.setwarnings(False) GPIO.setmode(GPIO.BCM) GPIO.setup(20, GPIO.IN, pull_up_down=GPIO.PUD_DOWN) GPIO.setup(24, GPIO.OUT)

while True: if GPIO.input(20): GPIO.output(24, 1) sleep(1) os.system("/home/pi/txtest.sh") sleep(1) GPIO.output(24, 0)

And this sh-file runs the command : #!/bin/bash cd \rpitx echo -e "123456:Hello World" | sudo ./pocsag -f 434.000e6

[VasylSamoilov]

have you modified boot.txt? this is part of install.sh script to get pi more stable: https://github.com/F5OEO/rpitx/blob/cce1fe6acf90d4d34ce304aed48fe80ec4ff51e7/install.sh#L38 And I found that pi 3b is the best. Not all pi are equal.

[sa7bnb]

Will check boot out, and i already using on a Raspberry pi 3 instead off pi4.