A collection of projects I've re/written over time for programming Espressif MCUs. Languages used are C/C++ and MicroPython.
- For C/C++ programming I've used the ESP-IDF development tools v5.4 (https://github.com/espressif/esp-idf) on Linux Mint 22.1.
- For MicroPython I've used version 1.24.1 (https://github.com/micropython/micropython)
These projects are current as of January 2025.
There are now three ESP-IDF folders, v4 for ESP-IDF 4.x, v5 and v5+ for ESP-IDF v5.x. All new work is on the v5 and v5+ branches. The v4 is left for historical purposes. The important feature on the v5/v5+ branches is the enabling of SPIRAM on those ESP32-S3 development boards that have octal SPIRAM.
NOTE: Only ESP-IDF projects are bifurcated down the three branches. All MicroPython projects are at this level.
Each project has a README describing in greater specific detail what it is and what MCU and developer board it targets.
A project derived from an ESP-IDF LED flasher example that was considerably extended as an I2C learning laboratory.
The project still uses the RGB LED as well as five I2C Adafruit devices:
- a pair of LED alphanumeric displays
- a pair of LED 8x16 matrix displays
- a BNO055 IMU
The project specifically targets the ESP32-C3-DevKitC-02 v1.1 (https://docs.espressif.com/projects/esp-idf/en/v4.4.2/esp32c3/hw-reference/esp32c3/user-guide-devkitc-02.html).
A key feature of this development board is its use of RISC-V executing at 160MHz (https://riscv.org).
A project with a built-in Web server that manipulates the built-in NeoPixel. It also enbles full flash (8 MiB) and PSRAM (32 MiB). This is available in the v5+ folder. The version in the v5+ folder is a re-write of an earlier version in the v5 folder.
DO NOT USE THE VERSION IN THE V5 FOLDER!
The on-board NeoPixel LED is controlled via GPIO38.
Another project dervied from an ESP-IDF LED flasher example. Except in this application tasking is used to control the blinking of two LEDs. The RGB LED is in one task, and an external LED attached to pin GPIO46 is in another.
A project that is written in MicroPython and is meant to run with version 1.19.1 or greater. It acts as a simple access point and will present a single web page at IP address 192.168.1.2. That web page can control the on-board RGB LED.
An Espressif example project that is a major re-write in C++. Part of the main.cpp source was spun out as two files (esp_wifi_support.hpp and .cpp) to correct the use of switch statements for converting several enumerations into strings and begin to make it reusable. This project now compiles and runs on an ESP32-C6-DevKitC-1 v1.1 and v1.2.
In particular the output was cleaned up to replace the crude use of tabs with proper C/C++ print statement formatting. See the projects README file for an output example.
A project written explicitly for the ESP32-C6-DevKitC-1. The code simply cycles
continously through six different colours on the NeoPixel. If idf.py is
connected to monitor, then every six seconds or so a single line of text will
be emitted at the start of a colour cycle.