ArduinoBlocks Connector V5.1
IMPORTANT NOTE:
The Arduinoblocks connector must be run at the background for program uploading.
Since ArduinoBlocks connector version 5 supports the use of serial port in Wemos D1 board but version 4 cannot, we will use Arduinoblocks connector version 5.
Click http://www.arduinoblocks.com/web/site/abconnector5 link to open resource.