Webhook, post_data, GPIO partial changes

[deanhystad]

You call this each time do_POST() runs.

        setupGPIO()

And that sets all the outputs high.

Since the message is structured text, why not pull the information out of the message? The message format is C(index)P(group)MON where index is a digit from 1-8 and group is G or V. It is easy to write a regex that not only verifies the message but extracts the index and group information.

import re

def do_POST(message):
    try:
        pin, group = re.match(r'C([1-8])P(G|V)MON', message).groups()
        print(group, pin)
    except:
        print(message, "is invalid")

while True:
    do_POST(input("Enter Message: "))

Output:
>>> python test.py
Enter Message: arfarf
arfarf is invalid
Enter Message: C7PGMON
G 7
Enter Message: C3PVMON
V 3

Knowing the group and index, it is easy to map this to a particular output.

import RPi_GPIO as GPIO
import re

# Define the LED groups.
led_groups = {
    "G":(4, 5, 6, 7, 8, 9, 10, 11),
    "V":(12, 13, 14, 15, 16, 17, 18, 19)
}

# Process a message
def do_POST(message):
    try:
        pin, group = re.match(r'C([1-8])P(G|V)MON', message).groups()
        group = led_groups[group]
        pin = group[int(pin)-1]
        for p in group:
            print(p, "=", GPIO.LOW if p == pin else GPIO.HIGH)
    except:
        print(message, "is invalid")

while True:
    do_POST(input("Enter Message: "))

Output:
>>> python test.py
Enter Message: C7PVMON
12 = 1
13 = 1
14 = 1
15 = 1
16 = 1
17 = 1
18 = 0
19 = 1
Enter Message:

And since there are lists of outputs, may as well use those to initialize the GPIO outputs.

import RPi_GPIO as GPIO
import re

# Define the LED groups.
led_groups = {
    "G":(4, 5, 6, 7, 8, 9, 10, 11),
    "V":(12, 13, 14, 15, 16, 17, 18, 19)
}

# Initalize outputs used to turn LED's on/off
def setupGPIO():
    GPIO.setmode(GPIO.BCM)
    GPIO.setwarnings(False)
    for group in led_groups.values():
        for pin in group:
            GPIO.setup(pin, GPIO.OUT, initial=GPIO.HIGH)


# Process a message
def do_POST(message):
    try:
        pin, group = re.match(r'C([1-8])P(G|V)MON', message).groups()
        group = led_groups[group]
        pin = group[int(pin)-1]
        for p in group:
            GPIO.output(p, GPIO.LOW if p == pin else GPIO.HIGH)
    except:
        print(message, "is invalid")

if __name__ == '__main__':
    setupGPIO()  # This setup code belongs down here, not in do_post
    while True:
        do_POST(input("Enter Message: "))