How to flash MicroPython to your ESP32 board in 30 seconds

This script does all the neccessary steps to flash MicroPython to your ESP32 board on Linux. Run this script with your board plugged in via USB:

#!/bin/sh
# Call without arguments
# Download esptool
git clone https://github.com/espressif/esptool.git -b v2.8
cd esptool
# Erase flash. Press the reset button while Connecting.
python3 esptool.py --chip esp32 --port /dev/ttyUSB* erase_flash
# Download firmware
wget -qO micropython.bin https://micropython.org/resources/firmware/esp32-idf4-20191220-v1.12.bin
# Upload firmware to board
python3 esptool.py --chip esp32 --port /dev/ttyUSB* --baud 460800 write_flash -z 0x1000 micropython.bin

Remember to press the RESET button on the board if the script is telling you Connecting.... Not sure which button it is? Just press either one, and if the output doesn’t show Chip is ESP32 within 2 seconds, press the other one.

This script was built for my ESP-WROOM-32 board.

Now you can try to get into a REPL using USB.