adjusted main.py to emulate serial on its own

main.py

@@ -1,13 +1,15 @@
 from pyLoraRFM9x import LoRa, ModemConfig
-from SerialEmulator import SerialEmulator
-emulator = SerialEmulator('./ttydevice','./ttyclient') 
+import serial
+
+addr = '/tmp/virttty'
+conn = serial.serial_for_url(addr)
 
 # This is our callback function that runs when a message is received
 def on_recv(payload):
     print("From:", payload.header_from)
     print("Received:", payload.message)
     print("RSSI: {}; SNR: {}".format(payload.rssi, payload.snr))
-    emulator.write(payload.message)
+    conn.write(payload.message)
 
 
 # Use chip select 1. GPIO pin 5 will be used for interrupts and set reset pin to 25
@@ -17,9 +19,8 @@ lora.on_recv = on_recv
 
 # Send a message to a recipient device with address 10
 # Retry sending the message twice if we don't get an  acknowledgment from the recipient
-message = "Hello there!"
 while True:
-    message = emulator.read()
+    message = conn.readline()
     if message != '':
         print("new messsage:", message)
         status = lora.send_to_wait(message, 10, retries=2)
@@ -27,5 +28,3 @@ while True:
             print("Message sent!")
         else:
             print("No acknowledgment from recipient")
-
-emulator.stop()