I hope you find MicroPython is VERY useful and perfect for you. But just in case it doesn’t, or for any reason you want to rollback to Arduino. Here is how to do it.

Requisites

ESPTool (already installed if you went from Arduino to MicroPython)

pip3 install esptool

If there is a permissions problem doing this, try to run pip3 install either by using “sudo” or “–user” flag.

Steps

The following example assumes the USB port can be found at /dev/cu.SLAB_USBtoUART, but you may find it at /dev/ttyUSB0

1. Erase your ESP32 Flash.

$ esptool.py --port /dev/cu.SLAB_USBtoUART erase_flash
esptool.py v2.8
Serial port /dev/cu.SLAB_USBtoUART
Connecting........__
Detecting chip type... ESP32
Chip is ESP32D0WDQ6 (revision 1)
Features: WiFi, BT, Dual Core, Coding Scheme None
Crystal is 40MHz
MAC: 24:0a:c4:0c:94:78
Uploading stub...
Running stub...
Stub running...
Erasing flash (this may take a while)...
Chip erase completed successfully in 4.1s
Hard resetting via RTS pin...

  2. Thanks it! You can now go back to Arduino IDE and build and run programs on your ESP32 board!

Another useful ESPTool’s sub command

ESPTool let us retrieve the MAC address of the device from our host. This can be used for several things, like for example creating specific setup files. In order to read the ESP32 MAC address, run ESPTool with the subcommand “read_mac” as shown below

$ esptool.py --port /dev/cu.SLAB_USBtoUART read_mac
esptool.py v2.8
Serial port /dev/cu.SLAB_USBtoUART
Connecting........__
Detecting chip type... ESP32
Chip is ESP32D0WDQ6 (revision 1)
Features: WiFi, BT, Dual Core, Coding Scheme None
Crystal is 40MHz
MAC: 24:0a:c4:9d:24:28
Uploading stub...
Running stub...
Stub running...
MAC: 24:0a:c4:9d:24:28
Hard resetting via RTS pin...