Initialize piNail project with modern piNail2 web controller

piNail.py

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+# Can enable debug output by uncommenting:
+#import logging
+#logging.basicConfig(level=logging.DEBUG)
+
+import time
+
+import Adafruit_GPIO.SPI as SPI
+import MAX6675.MAX6675 as MAX6675
+
+from simple_pid import PID
+kP =150
+kI = 5
+kD = 1
+
+setpoint = 580
+pid = PID(kP, kI, kD, setpoint)
+loop_size = int(3000)
+pid.output_limits = (0, loop_size)    # output value will be between 0 and  5000
+
+
+# Raspberry Pi software SPI configuration.
+CLK = 3
+CS  = 14
+DO  = 4
+sensor = MAX6675.MAX6675(CLK, CS, DO)
+
+relayPin = 2
+
+import RPi.GPIO as GPIO    # Import Raspberry Pi GPIO library
+GPIO.setwarnings(False)    # Ignore warning for now
+GPIO.setmode(GPIO.BCM)   # Use physical pin numbering
+GPIO.setup(relayPin, GPIO.OUT, initial=GPIO.LOW)   # Set pin 8 to be an output pin and set initial value to low (off)
+
+# Define a function to convert celsius to fahrenheit.
+def c_to_f(c):
+        return c * 9.0 / 5.0 + 32.0
+        
+print('Press Ctrl-C to quit.')
+try:
+    while True:
+        temp = c_to_f(sensor.readTempC())
+        start_milli_time = int(round(time.time() * 1000))
+        current_milli_time = int(round(time.time() * 1000))	
+        current_loop_end = start_milli_time + loop_size
+
+        while current_milli_time < current_loop_end:
+		        temp = c_to_f(sensor.readTempC())
+		        output = pid(temp)
+		        if current_milli_time < start_milli_time + output:
+			        GPIO.output(relayPin, GPIO.HIGH)
+		        else:
+			        GPIO.output(relayPin, GPIO.LOW)
+		        current_milli_time = int(round(time.time() * 1000))
+		        time.sleep(0.3)
+		        print("Temp: {0:.2f}, PWR: {1:.2f}, {2}".format(temp, output, GPIO.input(relayPin)))
+except:
+    GPIO.output(relayPin, GPIO.LOW)
+    print("Exiting properly")