/network_relay.py Secret
Created
May 18, 2024 20:04
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#!/usr/bin/python3 | |
# Send UDP messages as UTF-8 char messages like '<channel> <state>' -- sends back '<channel> <state> <code>\r\n' where code is 1 if successful, -1 if state invalid, -2 if channel invalid. | |
# channel: Should be '1', '2', '3', '4', '5', '6', '7', or '8' | |
# state: Should be '0' (off) or '1' (on) | |
import RPi.GPIO as GPIO | |
import socket | |
import time | |
UDP_RELAY_IP = "0.0.0.0" | |
UDP_RELAY_PORT = 7010 # Access this UDP port for byte messages | |
PINOUT = [5, 6, 13, 16, 19 ,20, 21, 26] # BCM pins for Relay Hat Module | |
def initializeRelayPins(): | |
GPIO.setmode(GPIO.BCM) | |
GPIO.setwarnings(False) | |
for pin in PINOUT: | |
GPIO.setup(pin, GPIO.OUT) | |
GPIO.output(pin, False) | |
def myNetworkInterface(listener_ip: str = UDP_RELAY_IP, listener_port: int = UDP_RELAY_PORT): | |
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) | |
sock.bind((listener_ip, listener_port)) | |
print(f"Listening for UDP messages on {listener_ip}:{listener_port}...") | |
while True: | |
data, addr = sock.recvfrom(8) # Buffer size is 8 bytes | |
message = data.decode('utf-8').strip() | |
print(f"Received message: {message} from {addr}") | |
try: | |
channel, state = message.split() | |
channel = int(channel)-1 | |
confirmation_base = "f"{channel+1} {state}" | |
if 0 <= channel < len(PINOUT): | |
pin_number = PINOUT[channel] | |
if state == '1': | |
GPIO.output(pin_number, True) | |
confirmation_state = 1 | |
elif state == '0': | |
GPIO.output(pin_number, False) | |
confirmation_state = 1 | |
else: | |
print(f"Unknown state: {state}") | |
confirmation_state = -1 | |
else: | |
print(f"Invalid channel number: {channel + 1}") | |
confirmation_state = -2 | |
confirmation_message = f"{confirmation_base} {confirmation_state}\r\n" | |
sock.sendto(confirmation_message.encode('utf-8'),addr) | |
except Exception as e: | |
print(f"Error processing message: {e}") | |
if __name__ == "__main__": | |
initializeRelayPins() | |
try: | |
myNetworkInterface() | |
except KeyboardInterrupt: | |
for pin in PINOUT: | |
GPIO.output(pin,False) | |
GPIO.cleanup() | |
except Exception as e: | |
print(f"An error occurred: {e}") | |
for pin in PINOUT: | |
GPIO.output(pin,False) | |
GPIO.cleanup() | |
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