Simple ping based host monitor with option to disable checks by toggling a push button. Pin numbers to suit Pi Hut StatusBoard.

simple_avmon.py

#!/usr/bin/python3
import RPi.GPIO as GPIO
from time import sleep
import os

# Define Pin Numbers
red1 = 4
green1 = 17
button1 = 14
red2 = 27
green2 = 22
button2 = 19
red3 = 10
green3 = 9
button3 = 15
red4 = 11
green4 = 5
button4 = 26
red5 = 6
green5 = 13
button5 = 18
# Setup GPIO Pins
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(red1,GPIO.OUT)
GPIO.setup(green1,GPIO.OUT)
GPIO.setup(red2,GPIO.OUT)
GPIO.setup(green2,GPIO.OUT)
GPIO.setup(red3,GPIO.OUT)
GPIO.setup(green3,GPIO.OUT)
GPIO.setup(red4,GPIO.OUT)
GPIO.setup(green4,GPIO.OUT)
GPIO.setup(red5,GPIO.OUT)
GPIO.setup(green5,GPIO.OUT)
GPIO.setup(button1,GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(button2,GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(button3,GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(button4,GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(button5,GPIO.IN, pull_up_down=GPIO.PUD_UP)
for i in (red1,green1,red2,green2,red3,green3,red4,green4,red5,green5):
    GPIO.output(i, 0)

# By default enable all checks
en1 = True
en2 = True
en3 = True
en4 = True
en5 = True

# Define buttonpress callback functions
def callback1(channel):
    global en1
    en1 = not en1

def callback2(channel):
    global en2
    en2 = not en2

def callback3(channel):
    global en3
    en3 = not en3

def callback4(channel):
    global en4
    en4 = not en4

def callback5(channel):
    global en5
    en5 = not en5

# Configure button press interrupts
GPIO.add_event_detect(button1, GPIO.FALLING, callback=callback1, bouncetime=300)
GPIO.add_event_detect(button2, GPIO.FALLING, callback=callback2, bouncetime=300)
GPIO.add_event_detect(button3, GPIO.FALLING, callback=callback3, bouncetime=300)
GPIO.add_event_detect(button4, GPIO.FALLING, callback=callback4, bouncetime=300)
GPIO.add_event_detect(button5, GPIO.FALLING, callback=callback5, bouncetime=300)

def status_check():
    if en1 == True: # Encoder
        # Test is a single ping with a time limit of 1 second
        retval = os.system("ping -c 1 -w 1 192.168.13.1 > /dev/null 2>&1")
        if retval == 0: # ping successful
            GPIO.output(green1, 1)
            GPIO.output(red1, 0)
        else: # ping unsuccessful
            GPIO.output(green1, 0)
            GPIO.output(red1, 1)
    else: # channel is disabled
        GPIO.output(green1, 0)
        GPIO.output(red1, 0)

    if en2 == True: # Bridge Rx Device
        retval = os.system("ping -c 1 -w 1 192.168.13.105 > /dev/null 2>&1")
        if retval == 0:
            GPIO.output(green2, 1)
            GPIO.output(red2, 0)
        else:
            GPIO.output(green2, 0)
            GPIO.output(red2, 1)
    else:
        GPIO.output(green2, 0)
        GPIO.output(red2, 0)

    if en3 == True: # Player1
        retval = os.system("ping -c 1 -w 1 192.168.13.114 > /dev/null 2>&1")
        if retval == 0:
            GPIO.output(green3, 1)
            GPIO.output(red3, 0)
        else:
            GPIO.output(green3, 0)
            GPIO.output(red3, 1)
    else:
        GPIO.output(green3, 0)
        GPIO.output(red3, 0)

    if en4 == True: # Player 2
        retval = os.system("ping -c 1 -w 1 192.168.13.128 > /dev/null 2>&1")
        if retval == 0:
            GPIO.output(green4, 1)
            GPIO.output(red4, 0)
        else:
            GPIO.output(green4, 0)
            GPIO.output(red4, 1)
    else:
        GPIO.output(green4, 0)
        GPIO.output(red4, 0)

    if en5 == True: # Player 3
        retval = os.system("ping -c 1 -w 1 192.168.13.129 > /dev/null 2>&1")
        if retval == 0:
            GPIO.output(green5, 1)
            GPIO.output(red5, 0)
        else:
            GPIO.output(green5, 0)
            GPIO.output(red5, 1)
    else:
        GPIO.output(green5, 0)
        GPIO.output(red5, 0)


# Run checks
try:
    while True:
        status_check()
        sleep(10) # Adjust for desired ping interval
except KeyboardInterrupt:
    GPIO.cleanup()