ESP32 Watch Display 2.01 IDF 15 Lesson Course Guide
Product: CrowPanel 2.01-inch HMI ESP32 Watch Display with a 240 × 296 IPS touchscreen
Lessons: 15
Development Platform: ESP-IDF v5.5.4 + ESP32-S3
Learning Path: Environment Setup → Hardware Interaction → Wireless Communication → Sensors and Audio → Power Management
1. Course Overview¶
This course is designed for the CrowPanel 2.01-inch HMI ESP32 Watch Display and uses native ESP-IDF APIs throughout. The lessons progress from development-environment setup to GPIO input, graphics and touch, wireless communication, onboard sensors, audio, and low-power operation.
The course begins by validating the ESP-IDF v5.5.4 toolchain and ESP32-S3 memory configuration. Later lessons cover the BOOT button, GC9309 display, AXS5106L touch controller, LVGL 9.1, rotary encoder, PCF8563 RTC, Wi-Fi, BLE, SC7A20HTR accelerometer, vibration motor, battery monitoring, I2S speaker, PDM microphone, audio recording, and Light Sleep.
2. Before You Begin¶
- Hardware: CrowPanel 2.01-inch HMI ESP32 Watch Display
- USB Cable: A USB cable that supports data transfer
- Development Software: Visual Studio Code with the ESP-IDF extension
- ESP-IDF Version: v5.5.4
- Target: ESP32-S3
- Flash: 16 MB, QIO mode
- PSRAM: Octal-mode PSRAM
- Test Device: A phone or computer with 2.4 GHz Wi-Fi and BLE support
3. Course Code¶
Complete Course Source: Open the ESP-IDF course repository
4. Course Catalog¶
| Lesson | Title | Main Topic |
|---|---|---|
| 01 | ESP-IDF Setup and Serial Verification | Configure ESP-IDF v5.5.4 and verify the ESP32-S3, flash, PSRAM, and serial console |
| 02 | BOOT Button Event Detection | Detect press, release, click, double-click, and long-press events |
| 03 | Display, Touchscreen, and LVGL | Drive the GC9309 display, AXS5106L touch controller, and LVGL 9.1 UI |
| 04 | Rotary Encoder and Push Button | Detect clockwise and counterclockwise rotation and button events |
| 05 | PCF8563 RTC Basics | Read the date, time, weekday, and low-voltage flag over I2C |
| 06 | Wi-Fi Scanning and Connection | Scan wireless networks and connect in Station mode |
| 07 | Wi-Fi and RTC Time Synchronization | Retrieve NTP time and write it to the PCF8563 RTC |
| 08 | BLE Service and Characteristic | Create a BLE peripheral with read, write, and notification support |
| 09 | Accelerometer and Motion Detection | Read SC7A20HTR three-axis data and detect significant movement |
| 10 | Vibration Motor Control | Control vibration patterns with GPIO and non-blocking timing |
| 11 | Battery Voltage and Charging Status | Measure battery voltage with the ADC and read charging status |
| 12 | I2S Speaker Playback | Generate and play a 440 Hz sine-wave test tone |
| 13 | PDM Microphone Input | Capture audio and calculate peak and RMS levels |
| 14 | Audio Recording and Playback | Record microphone audio and play it through the speaker |
| 15 | Light Sleep and Touch Wake-Up | Enter Light Sleep and wake through the touch interrupt or safety timer |
5. Lesson Links¶
Lesson 01｜Set Up ESP-IDF and Verify the Serial Console¶
Lesson Link: View Lesson 01
Lesson 02｜Read the BOOT Button and Report Events¶
Lesson Link: View Lesson 02
Lesson 03｜Drive the Display, Touchscreen, and LVGL UI¶
Lesson Link: View Lesson 03
Lesson 04｜Read the Rotary Encoder and Push Button¶
Lesson Link: View Lesson 04
Lesson 05｜Read the PCF8563 Real-Time Clock¶
Lesson Link: View Lesson 05
Lesson 06｜Scan for Wi-Fi and Connect in Station Mode¶
Lesson Link: View Lesson 06
Lesson 07｜Synchronize the PCF8563 RTC with NTP¶
Lesson Link: View Lesson 07
Lesson 08｜Build a BLE Service and Characteristic¶
Lesson Link: View Lesson 08
Lesson 09｜Read the Accelerometer and Detect Motion¶
Lesson Link: View Lesson 09
Lesson 10｜Control the Vibration Motor¶
Lesson Link: View Lesson 10
Lesson 11｜Measure Battery Voltage and Charging Status¶
Lesson Link: View Lesson 11
Lesson 12｜Play a 440 Hz Tone through the I2S Speaker¶
Lesson Link: View Lesson 12
Lesson 13｜Capture PDM Microphone Input and Measure Volume¶
Lesson Link: View Lesson 13
Lesson 14｜Record Audio and Play It Back¶
Lesson Link: View Lesson 14
Lesson 15｜Enter Light Sleep and Wake on Touch¶
Lesson Link: View Lesson 15
6. Recommended Learning Order¶
Follow Lessons 01 through 15 in sequence:
- Development Foundation: Lesson 01 validates the ESP-IDF toolchain and memory configuration.
- Hardware Interaction: Lessons 02–05 cover buttons, display, touch, rotary input, and the RTC.
- Wireless Communication: Lessons 06–08 cover Wi-Fi, NTP synchronization, and BLE.
- Sensing and Feedback: Lessons 09–11 cover motion detection, vibration feedback, and battery monitoring.
- Audio Features: Lessons 12–14 cover speaker output, microphone input, and audio recording.
- Low-Power Development: Lesson 15 introduces Light Sleep and touch-based wake-up.