MicroPython with the ESP32


The first thing you need is a board with an ESP32 chip. The MicroPython software supports the ESP32 chip itself and any board should work. The main characteristic of a board is how the GPIO pins are connected to the outside world, and whether it includes a built-in USB-serial convertor to make the UART available to your PC.

Names of pins will be given in this tutorial using the chip names (eg GPIO2) and it should be straightforward to find which pin this corresponds to on your particular board.

Powering the board
If your board has a USB connector on it then most likely it is powered through this when connected to your PC. Otherwise you will need to power it directly. Please refer to the documentation for your board for further details.

Getting the firmware
The first thing you need to do is download the most recent MicroPython firmware .bin file to load onto your ESP32 device. You can download it from the MicroPython downloads page. From here, you have 3 main choices:

Stable firmware builds

Daily firmware builds

Daily firmware builds with SPIRAM support

If you are just starting with MicroPython, the best bet is to go for the Stable firmware builds. If you are an advanced, experienced MicroPython ESP32 user who would like to follow development closely and help with testing new features, there are daily builds. If your board has SPIRAM support you can use either the standard firmware or the firmware with SPIRAM support, and in the latter case you will have access to more RAM for Python objects.

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