Preparing for release v0.1

Updated Circuit image
renamed directories for better understanding
fixed bugs in pi-slave/main.py
fixed bugs in pi-master/main.py
polished Readme.md

pi-slave/main.py

@@ -0,0 +1,57 @@
+import RPi.GPIO as GPIO
+import subprocess
+import time
+
+# GPIO setup
+GPIO.setmode(GPIO.BCM)
+GPIO.setwarnings(False)
+
+# Powering Status Pin to indicate that control program is up
+GPIO.setup(4, GPIO.OUT)
+GPIO.output(4, True)
+
+# setting up communication pins for binary fanmode transmission
+GPIO.setup(17, GPIO.OUT)
+GPIO.setup(18, GPIO.OUT)
+
+# define default variables -> fan speed will be at max. if someting goes wrong with getting cpu temps
+thermal = -99
+fanmode = 100
+i = 0
+
+# function to get cpu temperature on linux and macOS and decide on fan speed.
+def temp(thermal, fanmode):
+    thermal = int(round(float(subprocess.check_output("cat /sys/class/thermal/thermal_zone0/temp", shell=True).rstrip())/1000,2))
+    if thermal <= 20:
+        fanmode = 0
+    elif 20 < thermal <= 40:
+        fanmode = 25
+    elif 40 < thermal <= 60:
+        fanmode = 50
+    elif 60 < fanmode <= 70:
+        fanmode = 75
+    elif 70 < fanmode:
+        fanmode = 100
+    return thermal, fanmode
+
+# main loop
+while True:
+    # get cpu temp
+    thermal, fanmode = temp(thermal, fanmode)
+    if fanmode == 0 or fanmode == 25:
+        GPIO.output(17, False)
+        GPIO.output(18, True)
+    elif fanmode == 50:
+        GPIO.output(17, True)
+        GPIO.output(18, False)
+    elif fanmode == 75:
+        GPIO.output(17, True)
+        GPIO.output(18, True)
+    else:
+        GPIO.output(17, False)
+        GPIO.output(18, False)
+    # cpu temp will be updated every 5 seconds
+    time.sleep(5)
+    i += 1
+    # log cpu temp and fan speed
+    print("----- Run Nr.:", i, "\nCpu temperature measured: ", str(thermal) + "°C", "- Fanspeed: ", str(fanmode) + "%")