Working with Arduino

ESP32-S3 Applications

Example path: ESP32-S3-A-SIM7670X-4G-V2 → Arduino-V3.3.4 → examples

Camera

This example is modified from the official ESP32 CameraWebServer example to adapt it for the ESP32-S3 platform.

• Set the Wi-Fi SSID and password, and switch the default hardware to ESP32-S3

• Turn on the CAM DIP switch on the back of the board and connect a supported camera

• Confirm the Camera pin definitions as follows:

  Pin Definition	V1 Version	V2 Version
  #define PWDN_GPIO_NUM	-1	-1
  #define RESET_GPIO_NUM	-1	-1
  #define XCLK_GPIO_NUM	34	39
  #define SIOD_GPIO_NUM	15	15
  #define SIOC_GPIO_NUM	16	16
  #define Y9_GPIO_NUM	14	14
  #define Y8_GPIO_NUM	13	13
  #define Y7_GPIO_NUM	12	12
  #define Y6_GPIO_NUM	11	11
  #define Y5_GPIO_NUM	10	10
  #define Y4_GPIO_NUM	9	9
  #define Y3_GPIO_NUM	8	8
  #define Y2_GPIO_NUM	7	7
  #define VSYNC_GPIO_NUM	36	42
  #define HREF_GPIO_NUM	35	41
  #define PCLK_GPIO_NUM	37	46

• After flashing the program, open the serial terminal. Access the IP address output by the serial monitor in a browser to view the camera feed, as shown in the following figure:

  

TF-Card

• Insert the TF-Card into the TF card slot

  

• Define the pins

  const int SDMMC_CLK  = 5;
  const int SDMMC_CMD  = 4;
  const int SDMMC_DATA = 6;
  const int SD_CD_PIN  = 46;

• Flash the program and open the terminal to display the file contents

  

RGB

This development board is equipped with one WS2812B RGB LED. The signal pin is GPIO38. After flashing the example program, the RGB LED will display a gradient effect, as shown in the following figure:

BAT

Note

This development board uses the MAX17048 as the battery fuel gauge IC.

• Confirm the I2C pin connections. There are differences in IO connections between the V1 and V2 versions:

  MAX17048 Pin	Version	SDA	SCL	Initialization Code
  ESP32-S3 IO	V1 Version	GPIO3	GPIO2	Wire.begin(3, 2)
  ESP32-S3 IO	V2 Version	GPIO15	GPIO16	Wire.begin(15, 16)

• Flash the example program. The battery alert threshold can be modified as needed