Update serial_connection.py
@@ -26,6 +26,7 @@ class SerialConnection(MicroPythonConnection):
try:
self._serial = serial.Serial(port, baudrate=baudrate, timeout=None)
+ # https://github.com/thonny/thonny/pull/1187
self._serial.dtr = 0
self._serial.rts = 0
except SerialException as error:
