xtensa-esp32-elf-raspberrypi

This is the esp32/esp32s2 gcc cross-compiler toolchain, version 2020r2, compiled for 64-bit raspberry pi os, and packaged as a debian .deb archive.

Install with sudo apt install ./xtensa-esp32-elf_8.2.0-2020r2_arm64.deb

Remove with sudo apt remove xtensa-esp32-elf

Files are installed in /opt.

arduino-esp32 on raspberry pi 64-bit

By itself, the Arduino IDE does not support ESP32 processors. This software for Raspberry Pi OS "Buster" (64-bit) adds support for ESP32 processors to the Arduino IDE.

Start and exit the Arduino IDE. This creates the directory ~/.arduino15 in your home directory, and the file ~/.arduino15/preferences.txt.

With the Arduino IDE not running, edit .arduino15/preferences.txt, and add the following line:

allow_insecure_packages=true

This allows the use of unsigned packages like this one. Also tick "Verbose output during upload".

Start the Arduino IDE. In File --> Preferences --> Additional Board Manager URLs: paste the following url:

https://raw.githubusercontent.com/koendv/xtensa-esp32-elf-raspberrypi/master/package_esp32_dev_index.json

Press OK.

Open Tools -> Board: -> Boards Manager In the search field, type "ESP32". Install the "esp32" board package. Ignore any messages "Warning: forced trusting untrusted contributions".

In the Tools menu select the ESP32 cores as compilation target. As an example, if using an ESP32 Wrover choose Tools->Board: -> ESP32 Arduino->ESP32 Wrover Module .

Notes

This esp32/esp32s2 gcc cross-compiler is for 64-bit raspberry only.

Build script: build.sh. Uses crosstool-ng. Downloads and builds source in current directory.

Packaging script: pkg.sh

Build mkspiffs script: make_mkspiffs.sh

See expressif doc: Setup linux toolchain from scratch