started work on backend

backend/sensors.py

@@ -0,0 +1,25 @@
+# sensors.py - a module for interfacing to the sensors
+# Copyright 2019 Kristjan Komloši
+# The code in this file is licensed under the 3-clause BSD License
+
+import serial as ser
+import pandas as pd
+from threading import Timer
+from sys import exit as ex
+
+class Spectrometer:
+    def schedule(self, delay):
+        self.timerObject=Timer(delay, retrieveData)
+
+    def __init__(self, path='/dev/ttyAMA0', baudrate=115200, timeout=1, refreshrate=1):
+        self.path=path
+        self.baudrate=baudrate
+        self.timeout=1
+        try:
+            self.serialObject = ser.Serial(path, baudrate, timeout)
+        except:
+            print('An exception occured when opening the serial port at {}'.format(path))
+            ex(1)
+        else:
+            initialiseSensor()
+            startDataCollection()