Extract CPU serial from /proc/cpuinfo

closes #1

Author: corny

config.yml.default

@@ -1,6 +1,5 @@
 luftdaten:
   enabled: true
-  sensor:  raspi-0000000000abcdef
 
 influxdb:
   enabled:  false

main.py

@@ -109,11 +109,17 @@ def __pushLuftdaten(self, url, pin, values):
             },
             headers={
                 "X-PIN":    str(pin),
-                "X-Sensor": config['luftdaten']['sensor'],
+                "X-Sensor": sensorID,
             }
         )
 
-
+# extracts serial from cpuinfo
+def getSerial():
+    with open('/proc/cpuinfo','r') as f:
+        for line in f:
+            if line[0:6]=='Serial':
+                print(line[10:26])
+    raise Exception('CPU serial not found')
 
 def run():
     m = Measurement()
@@ -128,7 +134,9 @@ def run():
     m.sendInflux()
 
 
+sensorID  = "raspi-" + getSerial()
 starttime = time.time()
+
 while True:
     print("running ...")
     run()