How to use this playground?

  1. Download MicroPython UART hex from
  2. Press F1, choose "Load HEX File and Start Simulation...", and choose the HEX file you downloaded
  3. Enjoy the MicroPython REPL in the Serial Monitor window!

  You can turn the LED on by typing the following command into the REPL:

  machine.Pin(2, machine.Pin.OUT).toggle()

void setup() {
  Serial1.println("To run MicroPython: Please read the comment at the beginning for the Source File");

void loop() {