Kumo-Pi-Remote.py

#! /usr/bin/python3

import RPi.GPIO as GPIO
import time
import sys
import traceback
from kumoManager import kumoManager

BUTTON_IN = [5, 10, 27, 3]
LED_OUT = [6, 9, 22, 4]

DEBUG = False

kumo_sources = {
    1:  14, # Stage 3
    2:  12, # Stage 5
    4:  11, # Stage 7
    8:  13, # Stage 11 (Drum)

    3:   9, # KiPro Out
    6:   4, # FOH Tie18
    12:  8} # DVD GLS SAT

kumo_dest = 4    # Switcher Channel 4

kumo_ip = "http://10.70.58.25"

kumo_manager = None

kumo_drop_next = False # Flag to drop next status check, becasue it might be stale

def set_led(v):
    for i in range(len(LED_OUT)):
        GPIO.output(LED_OUT[i], not (v & 2**i))

def button_callback(button, e = None):
    try:
        time.sleep(0.100)
        button_value = 0
        button_count = 0
        for i in range(len(BUTTON_IN)):
            if not GPIO.input(BUTTON_IN[i]):
                button_value += 2**i
                button_count += 1
        if (button_value == 0x0F):
            set_led(0)
            sys.exit()
        if (button_count):
            if (button_value in kumo_sources):
                set_led(button_value)
                kumo_drop_next = True
                if DEBUG: print (kumo_sources[button_value])
                if kumo_manager:
                    kumo_manager.setChannel(kumo_dest, kumo_sources[button_value])

    except:
        traceback.print_exc()

# Use BCM pin numbering convention
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)

# Button 4
# GPIO.setup(BUTTON_IN[3], GPIO.IN) #GPIO 3, Pin 5 #  A physical pull up resistor is fitted on this channel
# GPIO.setup(5, GPIO.IN, pull_up_down=GPIO.PUD_UP)
for g in BUTTON_IN:
    GPIO.setup(g, GPIO.IN, pull_up_down=GPIO.PUD_UP)
    GPIO.add_event_detect(g, GPIO.BOTH, callback=button_callback, bouncetime=120)

for g in LED_OUT:
    GPIO.setup(g, GPIO.OUT)
    GPIO.output(g, 0)

while True:
    # This "thread" maintains the link to the Kumo, and gets status updates
    led_value = 0
    if not kumo_manager:
        time.sleep(3) # Wait 3 seconds and try to re-establish
        kumo_manager = kumoManager(kumo_ip)
    if kumo_manager.online:
        kumo_current_source = kumo_manager.getChannel(kumo_dest)
        if kumo_drop_next:
            kumo_drop_next = false
        else:
            for s in kumo_sources:
                if kumo_current_source == kumo_sources[s]:
                    led_value = s
                    break
    else:
        kumo_manager = None
        kumo_drop_next = False

    set_led(led_value)
    time.sleep(0.5)