added .py to control relay switch for fan

control_relay.py

@@ -0,0 +1,37 @@
+import RPi.GPIO as GPIO
+import time
+import sys
+
+# Use BCM GPIO numbering
+GPIO.setmode(GPIO.BCM)
+
+# Set GPIO pin 18 as output
+relay_pin = 18
+GPIO.setup(relay_pin, GPIO.OUT)
+
+# Function to turn on the relay
+def turn_on_relay():
+    GPIO.output(relay_pin, GPIO.HIGH)
+
+# Function to turn off the relay
+def turn_off_relay():
+    GPIO.output(relay_pin, GPIO.LOW)
+
+# Check command line arguments
+if len(sys.argv) != 2:
+    print("Usage: python3 control_relay.py <on|off>")
+    sys.exit(1)
+
+command = sys.argv[1]
+
+if command == "on":
+    turn_on_relay()
+    print("Relay is ON")
+elif command == "off":
+    turn_off_relay()
+    print("Relay is OFF")
+else:
+    print("Invalid command. Use 'on' or 'off'.")
+
+# Clean up GPIO settings
+#GPIO.cleanup()