Update: Working on SDR RX

- Switched to using GQRX
- Created a handler to connect over Telnet to local GQRS

TODO
- Need to find a way to close GQRX without closing the application; Can't start the app with the radio listening, so it must be opened manually

gqrxHandler.py

@@ -0,0 +1,38 @@
+from telnetlib import Telnet
+
+class GQRXHandler():
+    def __init__(self, hostname: str = "localhost", port: int = 7356):
+        self.hostname = hostname
+        self.port = port
+
+        self.telnet_connection = None
+
+    def create_telnet_connection(self):
+        tel_conn = Telnet(self.hostname, self.port)
+        tel_conn.read_until("Escape character is '^]'.")
+
+        return tel_conn
+
+    def change_freq(self, freq):
+        tel_conn = self.create_telnet_connection()
+        tel_conn.write(f"F {int(freq)}")
+        tel_conn.read_all()
+        tel_conn.close()
+
+    def change_squelch(self, squelch):
+        tel_conn = self.create_telnet_connection()
+        tel_conn.write(f"L SQL {float(squelch)}")
+        tel_conn.read_all()
+        tel_conn.close()
+
+    def change_mode(self, mode):
+        tel_conn = self.create_telnet_connection()
+        tel_conn.write(f"M {str(mode)}")
+        tel_conn.read_all()
+        tel_conn.close()
+
+    def set_all_settings(self, mode, squelch, freq):
+        tel_conn = self.create_telnet_connection()
+        tel_conn.write(f"F {int(freq)}")
+        tel_conn.write(f"M {str(mode)}")
+        tel_conn.write(f"L SQL {float(squelch)}")