ESP Demos

esp_demos is a project for learning various ESP32 features and interesting demos. This project is built on the release version of IDF Release V5.5.

Project Capabilities

This repository provides practical examples demonstrating how to achieve various capabilities using the ESP32 series chips (especially ESP32-S3):

🧠 Deep Learning & AI (dl, algorithm)

• Image Classification: Categorize images (e.g., CIFAR10, MNIST) using TensorFlow Lite Micro.
• Data Prediction: Perform regression and prediction tasks like Boston Housing pricing and Sine wave prediction using TFLite.
• Audio Processing: Extract MFCC (Mel-frequency cepstral coefficients) features from audio, and implement voice-activated lighting using the ESP-SR library.

🌐 Network & Cloud API (http)

• LLM Integration: Connect deeply with various Large Language Models via HTTP APIs, including Moonshot Kimi, Aliyun Tongyi Qianwen, Xunfei Xinghuo, and a general ESP GPT example.
• Baidu Cloud Services: Practical integrations for Baidu Access Token retrieval, Image Classification, Speech Recognition, and Text-to-Speech (TTS).

🔉 Audio Control (audio)

• I2S Audio Playback: Implement real-time audio playback using I2S amplifiers like MAX98357A.
• Recording & Storage: Record audio via I2S microphone (e.g., MSM261S4030H0) and save it directly to an SD Card.

🔌 USB Protocol Stack (usb)

• USB Device Emulation: Emulate devices like HID Keyboard, HID Audio Control, and native CDC ACM (Virtual COM Port).
• USB Data Transfer: Implement custom bulk transfers, WinUSB (no composite), and WebUSB.
• USB Host: Examples for USB Host features.

💡 Hardware & Peripherals (peripherals)

• LCD Displays: Drive LCD screens and parse JPEG images from SPIFFS to display them.
• PWM & Control: Generate complementary PWM signals and calculate PWM information.
• Communication Buses: Drive common protocols like CAN, I2C, SPI, and GPIO high-speed flipping (up to 8MHz on S3).
• Signal Control: Utilize RMT and PCNT.

📜 Data Protocols (protocols)

• Serialization: Parse and handle JSON data, Protobuf (using nanopb), and Protobuf-C.
• Industrial Protocols: Implement Modbus communication.

🖥️ UI & Graphics (ui)

• LVGL Integration: Create graphical user interfaces using LVGL, including examples combining LCD and camera.
• Custom UI: Projects like wououi.

⚙️ System & Core (pie, system)

• Processor Instruction Extensions (PIE): Examples covering assembly instructions, math, and memory operations on the core.
• Build System: Advanced CMake features like building for two targets (build_two_target).