Arduino

https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json

6. Wait for downloading.

7. arduino-esp32 is downloaded.

Use Arduino Demo

1. Select the demo, here we choose the demo to get the chip ID.

2. Select the board as ESP32S3 Dev Module.

3. Choose the COM5 port of ESP32-S3 USB.

4. Click the download button, then it compiles and downloads automatically.

5. Finish.

6. Open the Serial Port Monitor.

7. See the chip ID of the loop output.

LCD Description

LCD and its Controller

• The built-in controller used in this LCD is ST7789V2, which is an LCD controller with 240 × RGB × 320 pixels, while the pixels of this LCD are 240(H) × RGB × 280(V). Hence, the LCD's internal RAM is not fully used.
  
• This LCD supports 12-bit, 16-bit, and 18-bit per pixel input color formats, namely RGB444, RGB565, and RGB666 color formats, this demo uses RGB565 color format, which is also commonly used RGB Format.
  
• This LCD uses a four-wire SPI communication interface, which can greatly save the GPIO port, and the communication speed will be faster.
  
• The resolution of this module is 240(H) × RGB × 280(V), but sometimes it may not fully display your images as it is round in corners.

SPI Communication Protocol

Note: The difference from the traditional SPI protocol is that the data line sent from the slave to the host is hidden because it only needs to be displayed. Please refer to Datasheet Page 66 for the table.
RESX is reset, it is pulled low when the module is powered on, usually set to 1;
CSX is the slave chip selection, and the chip will be enabled only when CS is low.
D/CX is the data/command control pin of the chip, when DC = 0, write command, when DC = 1, write data.
SDA is the transmitted data, that is, RGB data;
SCL is the SPI communication clock.
For SPI communication, data is transmitted with timing, that is, the combination of clock phase (CPHA) and clock polarity (CPOL):
The level of CPHA determines whether the data is collected on the first clock transition edge or the second clock transition edge of the serial synchronization clock. When CPHA = 0, data acquisition is performed on the first transition edge;
The level of CPOL determines the idle state level of the serial synchronous clock. CPOL = 0, which is a low level.
As can be seen from the figure, at the first falling edge of SCLK it starts to transmit data, 8-bit data is transmitted in one clock cycle, using SPI0, bit-by-bit transmission, high bit first, and low bit last.

Touch and its Controller

• This LCD is composed of surface toughened glass + thin film FILM material, which has high strength, strong hardness, and good light transmittance. The matching driver chip is CST816D self-capacitance touch chip, which supports the standard I2C communication protocol standard, which can realize a 10Khz~400Khz configurable communication rate.

I2C Communication Protocol

• The 7-bit device address of the chip is 0x15, that is, the device writing address is 0x2A, and reading address is 0x2B.
• Waveform introduction:
  • Write a single byte: (write 0x01 to 0x1F register)
  • 
  • Write multiple bytes consecutively (write 0x20, 0x01 to 0x1E and 0x1F respectively)
  • 
    
  • Read a single byte (read a single byte from 0x21)
  • 
  • Read multiple bytes consecutively (read 3 bytes from 0x21, 0x22, 0x23)
  • 

Sample Demo

Library Installation

It is recommended to directly use the "lib" library in the sample demo when using the LVGL library and modifying the corresponding screen configuration.
Copy the library file folder to "C:\Users\xxxx\Documents\Arduino\libraries ", "xxxx" is your PC username.

Arduino_LVGL

LVGL (Light and Versatile Graphics Library) is a free and open-source graphic library for embedded systems and is very suitable for devices with limited resources such as ESP32-S3. In the sample demo, you can use "LVGL_Arduino" to check the screen effect.

User-defined PWR_Key

This key is designed to address the limited functionality of external buttons. The working principle is as follows:

Pressing PWR can power the battery, and then the system boots. The system should define GPIO35 to continuously output a high level to maintain power-on effect. At this point, releasing PWR will not power off. The function of PWR at this time is to pull down GPIO36. The system detects pressing, double pressing, and long pressing of GPIO36 and can customize shutdown control operations. For example, in long press mode, the system sets GPIO35 to a low level to disconnect the battery power, thereby enabling the multi-function button to be used.

PCF85063 RTC Clock Chip

The PCF85063 RTC Clock facilitates the use of scheduled tasks, provides accurate time tracking, and low-power wake-up functions.
Through example demos, the RTC function can be easily utilized.

QMI8658 6-axis IMU

The QMI8658 can be used for applications such as posture detection, gait analysis, and fall detection. When embedded in this development board, it can be applied to smart wearables.
Example demos can be used to verify changes in multi-axis acceleration and the data can be observed directly through a visualization tool.

Buzzer

By combining RTC, it's possible to implement timed tasks, scheduled alarms, and other applications.

Resource

Document

• Schematic
• 3D Drawing
• Dimensions
• MicroPython Development Doc
• ESP32 Arduino Core's documentation
• arduino-esp32
• ESP-IDF

Datasheet

• ST7789V2 datasheet
• CST816S datasheet
• CST816S register description

Demo

• Demo

Software

• Zimo221
• Image2Lcd2.9
• Image Extraction
• Ink Screen Font Library Tutorial
• Chronos

FAQ

Support

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