serReader.py

#/usr/bin/python
import serial
import time
import sys

extruderSetPoint = 345
bedSetPoint = 6300

ser = serial.Serial("/dev/ttyUSB0", 115200)

ser.write("1")
# should hear relay click now, but I don't

while True:
	line = ser.readline()
	data = line.split(" ")
	if len(data) > 7:
		extruderResistance = float(data[3])
		bedResistance = float(data[-1].strip())

		if extruderResistance < extruderSetPoint and bedResistance < bedSetPoint:
			sys.exit()