fixed serial list nonetype (ExpressLRS#254)

mavericm1 · web-flow · commit d611f0b88e81 · 2020-12-04T08:21:02.000+10:00
* fixed serial list nonetype

* fixed seriallist nonetype and added sleep for older bootloader

* moving result.reverse() out of loop
diff --git a/src/python/UARTupload.py b/src/python/UARTupload.py
@@ -93,6 +93,7 @@ def uart_upload(port, filename, baudrate):
                             #break
                         elif "hold down button" in line.lower():
                             # this is last print before init cmd is expected
+                            time.sleep(.5)  # Sleep for older bootloader
                             break
                     # notify bootloader to start uploading
                     s.write(BootloaderInitSeq2)
diff --git a/src/python/serials_find.py b/src/python/serials_find.py
@@ -52,7 +52,8 @@ def serial_ports():
             if "permission denied" in str(error).lower():
                 raise Exception("You don't have persmission to use serial port!")
             pass
-    return result.reverse()
+    result.reverse()
+    return result
 
 def get_serial_port(debug=True):
     result = serial_ports()
