Improved GQRX handler speed

gqrxHandler.py

@@ -7,40 +7,29 @@ class GQRXHandler():
         self.hostname = hostname
         self.port = port
 
-        self.telnet_connection = None
+        self.tel_conn = None
 
     def create_telnet_connection(self):
         print("Creating connection")
-        tel_conn = Telnet(self.hostname, self.port)
-        tel_conn.open(self.hostname, self.port)
-
-        return tel_conn
+        self.tel_conn = Telnet(self.hostname, self.port)
+        self.tel_conn.open(self.hostname, self.port)
 
     def change_freq(self, freq):
-        tel_conn = self.create_telnet_connection()
         print(f"Changing freq to {freq}")
-        tel_conn.write(bytes(f"F {int(freq)}", 'utf-8'))
-        sleep(1)
-
-        tel_conn.close()
+        self.tel_conn.write(bytes(f"F {int(freq)}", 'utf-8'))
+        sleep(.25)
 
     def change_squelch(self, squelch):
-        tel_conn = self.create_telnet_connection()
         if not check_negative(squelch):
             squelch = float(-abs(squelch))
         print(f"Changing squelch to {squelch}")
-        tel_conn.write(bytes(f"L SQL {float(squelch)}", 'utf-8'))
-        sleep(1)
-
-        tel_conn.close()
+        self.tel_conn.write(bytes(f"L SQL {float(squelch)}", 'utf-8'))
+        sleep(.25)
 
     def change_mode(self, mode):
-        tel_conn = self.create_telnet_connection()
         print(f"Changing mode to {mode}")
-        tel_conn.write(bytes(f"M {str(mode)}", 'utf-8'))
-        sleep(1)
-
-        tel_conn.close()
+        self.tel_conn.write(bytes(f"M {str(mode)}", 'utf-8'))
+        sleep(.25)
 
     def set_all_settings(self, mode, squelch, freq):
         self.change_squelch(0)