ESP-IDF

This chapter contains the following sections. Please read as needed:

ESP-IDF Getting Started
Setting Up Development Environment
Demo

ESP-IDF Getting Started

New to ESP32 ESP-IDF development and looking to get started quickly? We have prepared a general Getting Started Tutorial for you.

Please Note: This tutorial uses the ESP32-S3-Zero as a teaching example, and all hardware code is based on its pinout. Before you start, it is recommended that you check the pinout of your development board to ensure the pin configuration is correct.

Setting Up Development Environment

info

For the ESP32-S3-Touch-LCD-3.49 development board, ESP-IDF V5.5.0 or above is required.

note

The following guide uses Windows as an example, demonstrating development using VS Code + the ESP-IDF extension. macOS and Linux users should refer to the official documentation.

Install the ESP-IDF Development Environment

Download the installation manager from the ESP-IDF Installation Manager page. This is Espressif's latest cross-platform installer. The following steps demonstrate how to use its offline installation feature.

Click the Offline Installer tab on the page, then select Windows as the operating system and choose your desired version from the filter bar.

After confirming your selection, click the download button. The browser will automatically download two files: the ESP-IDF Offline Package (.zst) and the ESP-IDF Installer (.exe).

Please wait for both files to finish downloading.
Once the download is complete, double-click to run the ESP-IDF Installer (eim-gui-windows-x64.exe).

The installer will automatically detect if the offline package exists in the same directory. Click Install from archive.

Next, select the installation path. We recommend using the default path. If you need to customize it, ensure the path does not contain Chinese characters or spaces. Click Start installation to proceed.
When you see the following screen, the ESP-IDF installation is successful.
We recommend installing the drivers as well. Click Finish installation, then select Install driver.

Install Visual Studio Code and the ESP-IDF Extension

Download and install Visual Studio Code.
During installation, it is recommended to check Add "Open with Code" action to Windows Explorer file context menu to facilitate opening project folders quickly.
In VS Code, click the Extensions icon in the Activity Bar on the side (or use the shortcut Ctrl + Shift + X) to open the Extensions view.
Enter ESP-IDF in the search box, locate the ESP-IDF extension, and click Install.
For ESP-IDF extension versions ≥ 2.0, the extension will automatically detect and recognize the ESP-IDF environment installed in the previous steps, requiring no manual configuration.

Demo

Demo	Basic Program Description	Dependency Library
01_ADC_Test	Get the voltage value of the lithium battery	-
02_I2C_PCF85063	Print real-time time of RTC chip	SensorLib
03_I2C_QMI8658	Print the raw data from IMU	SensorLib
04_SD_Card	Load and display the information of the TF card	-
05_WIFI_AP	Set to AP mode to obtain the IP address of the access device	-
06_WIFI_STA	Set to STA mode to connect to WiFi and obtain an IP address	-
07_BATT_PWR_Test	Control power via the PWR button when powered solely by the lithium battery	-
08_Audio_Test	Play the sound recorded by the microphone through the speaker	-
09_LVGL_V8_Test	LVGLV9 demo	LVGL V8.4.0
10_LVGL_V9_Test	LVGLV8 demo	LVGL V9.3.0
11_FactoryProgram	Comprehensive demo	LVGL V8.3.11

01_ADC_Test

Demo Description

The analog voltage connected through the GPIO is converted to digital by the ADC, and then the actual lithium battery voltage is calculated and printed to the terminal.

Hardware Connection

Connect the board to the computer using a USB cable

Code Analysis

adc_bsp_init(void): Initializes ADC1, including creating an ADC one-shot trigger unit and configuring Channel 3 of ADC1.
adc_get_value(float *value,int *data): Reads the value from Channel 3 of ADC1, calculates the corresponding voltage based on the reference voltage and resolution, and stores it at the location pointed to by the passed pointer. Stores 0 if the read fails.
adc_example(void* parameter): After initializing ADC1, creates an ADC task. This task reads the ADC value every second and calculates the system voltage from the raw ADC reading.

Operation Result

After the program is compiled and downloaded, you can view the printed ADC values and voltage output by opening the Serial Monitor, as shown in the following image:

02_I2C_PCF85063

Demo Description

Through the I2C protocol, initialize the PCF85063 chip, set the time, and then periodically read the time and print it to the terminal

Hardware Connection

Connect the board to the computer using a USB cable

Code Analysis

void i2c_rtc_loop_task(void *arg): Creates an RTC task to implement the RTC function, reading the clock of the RTC chip every second and outputting it to the terminal.

Operation Result

After the program is compiled and downloaded, open the serial port monitoring to see the RTC time of the printout, as shown in the following figure:

03_I2C_QMI8658

Demo Description

Initialize the QMI8658 chip via the I2C protocol, then read the corresponding attitude information every 200ms and print it to the terminal.

Hardware Connection

Connect the board to the computer using a USB cable

Code Analysis

void i2c_qmi_loop_task(void *arg): Creates a QMI task to acquire attitude information. The task reads and prints accelerometer and gyroscope data at 200ms intervals, and outputs the results to the serial console.

Operation Result

Open the serial monitor to view the raw data output from the IMU (Euler angles require conversion), as shown in the figure below:

04_SD_Card

Demo Description

Drive the TF card through SDMMC, and print the TF card information to the terminal after successfully mounting.

Hardware Connection

Install a FatFs-formatted into the board before powering on

Code Analysis

sdcard_init(void): Initializes the TF card using 1-line SDMMC mode.
sdcard_loop_task(void *arg): A task to test TF card read/write functionality. You need to uncomment the #define sdcard_write_Test macro definition.
```
//#define sdcard_write_Test
```

Operation Result

Click on the serial port monitoring device, you can see the output information of the TF card, as shown in the figure below:

05_WIFI_AP

Demo Description

This demo can set the development board as a hotspot, allowing phones or other devices in STA mode to connect to the development board.

Hardware Connection

Connect the board to the computer using a USB cable

Code Analysis

In the file softap_example_main.c, find SSID and PASSWORD, and then your phone or other device in STA mode can use the SSID and PASSWORD to connect to the development board.
```
#define EXAMPLE_ESP_WIFI_SSID      "waveshare_esp32"
#define EXAMPLE_ESP_WIFI_PASSWORD      "wav123456"
```

Operation Result

After flashing the program, open the Serial Terminal. If a device successfully connects to the hotspot, it will output the device's MAC address and IP address, as shown in the figure:

06_WIFI_STA

Demo Description

This example can configure the development board as a STA device to connect to a router, thereby enabling access to the system network.

Hardware Connection

Connect the board to the computer using a USB cable

Code Analysis

In the file esp_wifi_bsp.c, find ssid and password, then modify them to the SSID and Password of an available router in your current environment.
```
wifi_config_t wifi_config = {
  .sta = {
    .ssid = "PDCN",
    .password = "1234567890",
  },
};
```

Operation Result

After flashing the program, open the serial terminal, if the device is successfully connected to the hotspot, the IP address obtained will be output, as shown in the figure:

07_BATT_PWR_Test

Demo Description

Demonstrates how to control the system power via the PWR button when powered by the lithium battery.

Hardware Connection

Connect the board to the computer using a USB cable

Code Analysis

setup_ui(lv_ui *ui): Initializes the UI interface for visual control.
tca9554_init(): Initialize the lithium battery control IO port.
button_Init(): Initialize buttons and various trigger events.
example_button_pwr_task(void* parmeter): Task that waits for button event triggers.

Operation Result

After the program is flashed, disconnect the USB power supply and connect the lithium battery. Power on by pressing and holding the PWR button, as shown in the figure:
tip
1. Press and hold the PWR button, wait for the screen to display "On", which means that the startup is successful, and release the button
2. Press and hold the PWR button again, wait for the screen to display "Off", which means that the power is turned off successfully, and release the button

08_Audio_Test

Demo Description

Demonstrates how to get data from the microphone and then play it through the speaker

Hardware Connection

Connect the board to the computer using a USB cable

Code Analysis

i2c_master_Init(): Initializes the I2C bus.
tca9554_init(): Initializes the I/O ports for audio amplifier CTRL control.
lvgl_port_init(): Initializes the LVGL interface.
user_audio_bsp_init(): Initializes the audio interface.

Operation Result

After the program is flashed, as shown in the figure:
tip
1. Click Recording to enter recording mode, speak into the MIC, and it will automatically end after 3 seconds
2. Click Play to play the sound you just recorded
3. Click Play Music to play a piece of music
4. Click Music Exit to interrupt music playback

09_LVGL_V8_Test

Demo Description

Helps users quickly implement UI design by porting LVGL V8.

Hardware Connection

Connect the board to the computer using a USB cable

Code Analysis

If a 90-degree display rotation is needed, locate the #define Rotated macro in the user_config.h file and assign the value "USER_DISP_ROT_90".

If backlight testing is required, locate the #define Backlight_Testing macro in the user_config.h file and assign the value "true".

#define Backlight_Testing 0
#define USER_DISP_ROT_90 1
#define USER_DISP_ROT_NONO  0
#define Rotated USER_DISP_ROT_NONO   //Rotation via software

Operation Result

After the program is flashed, the device operation result is as follows:

10_LVGL_V9_Test

Demo Description

Helps users quickly implement UI design by porting LVGL V9.

Hardware Connection

Connect the board to the computer using a USB cable

Code Analysis

If a 90-degree display rotation is needed, locate the #define Rotated macro in the user_config.h file and assign the value "USER_DISP_ROT_90".

If backlight testing is required, locate the #define Backlight_Testing macro in the user_config.h file and assign the value "true".

#define Backlight_Testing 0
#define USER_DISP_ROT_90 1
#define USER_DISP_ROT_NONO  0
#define Rotated USER_DISP_ROT_NONO   //Rotation via software

Operation Result

After the program is flashed, the device operation result is as follows:

11_FactoryProgram

Demo Description

Comprehensive project, you can simply test the onboard hardware functions, or directly use the BIN firmware we provide for flashing.

Hardware Connection

Connect the board to the computer using a USB cable

Code Analysis

setup_ui(&src_ui);            // Set up the UI interface
lcd_bl_pwm_bsp_init(LCD_PWM_MODE_255);  // Initialize LCD backlight PWM, using 255-level brightness adjustment mode
tca9554_init();                  // Initialize TCA9554 GPIO expander chip
button_Init();                       // Initialize buttons
adc_bsp_init();                  // Initialize ADC for voltage detection
i2c_rtc_setup();                  // Setup RTC (real-time clock)
i2c_rtc_setTime(2025,7,7,18,43,30);  // Set RTC time to 2025-07-07 18:43:30
i2c_imu_setup();                // Setup IMU (inertial measurement unit)
_sdcard_init();                    // Initialize TF card
espwifi_init();                      // Initialize WiFi function
user_audio_bsp_init();      // Initialize user audio onboard support
audio_play_init();                // Initialize audio playback function

Operation Result

After the program is flashed, the device operation result is as follows:
tip
1. Use the main interface to determine whether the onboard hardware is functioning properly.
2. Swipe left to control the backlight
Touch and Audio control interface, as shown:
tip
1. Long press the BOOT button to enter the audio interface, where you can test recording and playback functions. Long press the BOOT button again to return to the main interface.
2. Click the BOOT button to enter the Touch interface, where you can draw Touch trajectories.

ESP-IDF Getting Started​

Setting Up Development Environment​

Install the ESP-IDF Development Environment​

Install Visual Studio Code and the ESP-IDF Extension​

Demo​

01_ADC_Test​

02_I2C_PCF85063​

03_I2C_QMI8658​

04_SD_Card​

05_WIFI_AP​

06_WIFI_STA​

07_BATT_PWR_Test​

08_Audio_Test​

09_LVGL_V8_Test​

10_LVGL_V9_Test​

11_FactoryProgram​

ESP-IDF Getting Started

Setting Up Development Environment

Install the ESP-IDF Development Environment

Install Visual Studio Code and the ESP-IDF Extension

Demo

01_ADC_Test

02_I2C_PCF85063

03_I2C_QMI8658

04_SD_Card

05_WIFI_AP

06_WIFI_STA

07_BATT_PWR_Test

08_Audio_Test

09_LVGL_V8_Test

10_LVGL_V9_Test

11_FactoryProgram