Update to the backend and new Screen.

Features:
- Added a new settings page
- Laid out some backend stuff to integrate some new features
- prepared backend to include an option to have the previous values also displayed when updating them both screens where you may change configuration of the microcontroller

BiogasControllerApp-V2.2/bin/lib/lib.py

@@ -0,0 +1,73 @@
+import serial
+import struct
+import bin.lib.comport_search
+"""@package docstring
+This package can communicate with a microcontroller"""
+
+coms = bin.lib.comport_search.ComportService()
+
+
+class Com:
+    def __init__(self):
+        self.xr = ""
+        self.output = ""
+        self.str_input = ""
+        self.str_get_input = ""
+        self.xs = ""
+        self.__comport = '/dev/ttyUSB0'
+
+    def connect(self, baudrate, special_port):
+        try:
+            self.__comport = coms.get_comport(special_port)
+        except:
+            pass
+        self.ser = serial.Serial(self.__comport, baudrate=baudrate, timeout=5)
+
+    def quitcom(self):
+        try:
+            self.ser.close()
+        except:
+            pass
+
+    def receive(self, amount_bytes):
+        self.xr = self.ser.read(amount_bytes)
+        return self.xr
+
+    def decode_ascii(self, value):
+        try:
+            self.output = value.decode()
+        except:
+            self.output = "Error"
+        return self.output
+
+    def check_value(self, value_check, checked_value):
+        if value_check == checked_value:
+            return 1
+        else:
+            return 0
+
+    def decode_int(self, value):
+        self.i = int(value, base = 16)
+        return self.i
+
+    def decode_float(self, value):
+        self.fs = str(value, 'ascii') + '00'
+        self.f = struct.unpack('>f', bytes.fromhex(self.fs))
+        return str(self.f[0])
+
+    def decode_float_2(self, value):
+        self.fs = str(value, 'ascii') + '0000'
+        self.f = struct.unpack('>f', bytes.fromhex(self.fs))
+        return str(self.f[0])
+
+    def get_input(self):
+        self.str_get_input = input("please enter a character to send: ")
+        return self.str_get_input
+
+    def send(self, str_input):
+        self.xs = str_input.encode()
+        self.ser.write(self.xs)
+
+    def send_float(self, float_input):
+        ba = bytearray(struct.pack('>f', float_input))
+        self.ser.write(ba[0:3])