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ESP32-S3-LCD-1.85 is a microcontroller development board that supports 2.4GHz WiFi and BLE 5. It integrates large capacity Flash and PSRAM, has a 1.85inch capacitive touch screen (touch version optional) onboard, can smoothly run GUI interface programs such as LVGL. Combined with various peripheral interfaces, it is suitable for the quick development of the HMI and other ESP32-S3 applications.
1. ESP32-S3R8 2. 16MB Flash 3. QST attitude sensor 4. TCA9554PWR 5. PCM5101 audio decoding chip 6. Power amplifier chip 7. Battery recharge manager Chip 8. ME6217C33M5G 9. RTC clock chip 10. Patch ceramic antenna 11. IPEX Gen 1 connector 12. TF card slot 13. Speaker interface | 14. Speaker volume button 15. Microphone 16. UART interface 17. Power indicator 18. USB Type-C interface 19. Connect the rechargeable RTC battery 20. Charge indicator 21. I2C interface 22. RESET button 23. BOOT button 24. Battery header 25. Battery power supply control button |
Pin | Function | Description |
GND | GND | Ground |
3V3 | 3V3 | External output 3.3V |
SCL | SCL (GPIO10) | I2C clock pin, cannot be used as regular GPIO |
SDA | SDA (GPIO11) | I2C data pin, cannot be used as regular GPIO |
Pin | Function | Description |
GND | GND | Ground |
3V3 | 3V3 | External output 3.3V |
TXD | TXD (GPIO43) | UART transmit data or as regular GPIO |
RXD | RXD (GPIO44) | UART receive data or as regular GPIO |
Parameter Name | Parameter |
Interface | USB Type-C |
Controller chip | ESP32-S3 |
LCD type | TFT |
LCD controller chip | Display: ST77916 |
Onboard devices | Attitude sensor: QMI8658 |
RTC clock: PCF85063 | |
PCM audio decoding chip: PCM5101 | |
MIC | |
TF | |
Battery recharging manager module | |
Dimensions | 49.95 (H) x 48.08 (V) (mm) |
LCD Pin | ESP32S3 |
LCD_SDA0 | GPIO46 |
LCD_SDA1 | GPIO45 |
LCD_SDA2 | GPIO42 |
LCD_SDA3 | GPIO41 |
LCD_SCK | GPIO40 |
LCD_CS | GPIO21 |
LCD_TE | GPIO18 |
LCD_RST | EXIO2 |
LCD_BL | GPIO5 |
TF Card | ESP32S3 |
SD_D0 / MISO | GPIO16 |
SD_CMD / MOSI | GPIO17 |
SD_SCK / SCLK | GPIO14 |
SD_D3 / CS | EXIO3 |
SD_D1 | NC |
SD_D2 | NC |
QMI8658 | ESP32S3 |
IMU_SCL | GPIO10 |
IMU_SDA | GPIO11 |
IMU_INT1 | EXIO5 |
IMU_INT2 | EXIO4 |
PCF85063ATL | ESP32S3 |
RTC_SCL | GPIO10 |
RTC_SDA | GPIO11 |
RTC_INT | GPIO9 |
Buzzer | ESP32S3 |
MIC_WS | GPIO2 |
MIC_SCK | GPIO15 |
MIC_SD | GPIO39 |
PCM5101 | ESP32S3 |
Speak_DIN | GPIO47 |
Speak_LRCK | GPIO38 |
Speak_BCK | GPIO48 |
ESP32-S3-LCD-1.85 currently provides two development tools and frameworks, Arduino IDE and ESP-IDF, providing flexible development options, you can choose the right development tool according to your project needs and personal habits.
Arduino IDEArduino IDE is an open source electronic prototyping platform, convenient and flexible, easy to get started. After a simple learning, you can start to develop quickly. At the same time, Arduino has a large global user community, providing an abundance of open source code, project examples and tutorials, as well as rich library resources, encapsulating complex functions, allowing developers to quickly implement various functions. | |
ESP-IDFESP-IDF, or full name Espressif IDE, is a professional development framework introduced by Espressif Technology for the ESP series chips. It is developed using the C language, including a compiler, debugger, and flashing tools, etc., and can be developed via the command lines or through an integrated development environment (such as Visual Studio Code with the Espressif IDF plugin). The plugin offers features such as code navigation, project management, and debugging. |
Each of these two development approaches has its own advantages, and developers can choose according to their needs and skill levels. Arduino are suitable for beginners and non-professionals because they are easy to learn and quick to get started. ESP-IDF is a better choice for developers with a professional background or high performance requirements, as it provides more advanced development tools and greater control capabilities for the development of complex projects.
This chapter introduces setting up the Arduino environment, including the Arduino IDE, management of ESP32 boards, installation of related libraries, program compilation and downloading, as well as testing demos. It aims to help users master the development board and facilitate secondary development.
Board name | Board installation requirement | Version number requirement |
---|---|---|
esp32 by Espressif Systems | "Install Offline" / "Install Online" | ≥3.0.2 |
Library Name | Description | Version | Library Installation Requirement |
---|---|---|---|
LVGL | Graphical library | v8.3.10 | "Install Offline" |
ESP32-audioI2S-master | Audio decoding library | v2.0.0 | "Install Offline" |
File
-> New Sketch
void setup() {
// put your setup code here, to run once:
Serial.begin(115200);
}
void loop() {
// put your main code here, to run repeatedly:
Serial.println("Hello, World!");
delay(2000);
}
File
-> Save As...
. In the pop-up menu, select the path to save the project, and enter a project name, such as Hello_World, click Save
①. Click to select the dropdown menu option Select Other Board and Port;
②. Search for the required development board model esp32s3 dev module and select;
③. Select COM Port;
④. Save the selection.
①. Compile the program; ②. Compile and download the program; ③. Download successful.
Demo | Basic Description | Dependency Library |
---|---|---|
LVGL_Arduino | Test onboard device functionality | LVGL, ESP32-audioI2S-master |
Demo description
Hardware connection
Code analysis
setup()
internally executes multiple initialization functions to configure and initialize hardware components connected to Arduino, such as RTC, gyroscope, LCD display, TF card, audio module, microphone, etc. With these initializations, it is ensured that the hardware is working properlyLvgl_Init()
) and Simulated touch function (Simulated_Touch_Init()
)Lvgl_Example1()
and Driver_Loop()
to further set the initial state of the system and create tasksLvgl_Loop()
is a loop function of the LVGL library that handles graphical interface updates, event responses, and other UI-related operations. In embedded systems, graphics libraries often need to be called frequently in the main loop to keep the interface refreshed and the interaction real-timevTaskDelay(pdMS_TO_TICKS(5))
is used to pause the task for 5 milliseconds. vTaskDelay
is a delay function in FreeRTOS that aims to reduce CPU usage, avoid taking up too much time slice, and ensure that other tasks of the system, such as peripheral processing, can be performed on timepinMode(BOOT_KEY_PIN, INPUT)
: Sets the BOOT_KEY_PIN pin to input mode so that the button input on that pin can be detectedstyle_checked
, set properties such as background color, opacity, border color, width, padding, rounded corners, shadow color, width, spread, horizontal and vertical offset, which may be used to highlight the currently selected objectxTaskCreatePinnedToCore(TouchTask, "TouchTask", 4096, NULL, 4, NULL, 1)
: Creates a task named "TouchTask" and pin it to a specific core for execution. This task may be used to continuously button input and simulate touch operationsdigitalRead
function to detect the input state of PWR_KEY_Input_PIN. If the pin is pressed down (i.e., read low), set the PWR_Flag
flag to 1. If the Boot_Flag
has been set at this time, it means that both keys may be pressed at the same time, and the OK_Flag
flag is set to 1. If the pin is not pressed and the OK_Flag
is false, it means the button has been released and no special operation was triggered. In this case, increase the value of the Switch_count
variablePWR_Flag
flag to 1. If the PWR_Flag
has been set at this time, it means that both buttons may be pressed at the same time, and the OK_Flag
flag is set to 1. If the pin is not pressed and the OK_Flag
is false, it means the button has been released and no special operation was triggered. In this case, increase the value of the Next_count
variablevTaskDelay(pdMS_TO_TICKS(10))
for a short delay to avoid excessive CPU usageResult demonstration
Parameter | Function | Description |
SD Card | Display TF card size | Connect the TF card, if the recognition fails, please format the TF card to FAT32 format (please wait for a while to reset and check again if the recognition fails for the first time) |
Flash Size | Display Flash size | Current onboard 16MB Flash |
Battery Voltage | Battery voltage | The battery voltage can be detected when the battery is connected |
Angular deflection | Display the angular deflection of the board | Display the offset in three directions |
RTC Time | Display RTC time | Display current RTC time If the RTC time is not consistent with the current time, because the data cannot be retained in the power-off state, if you need to keep the RTC time normal, you need to connect the RTC battery and update the RTC time |
Wireless scan | Display the number of scanned WiFi | When it finishes, display Scan Finish at the end |
Backlight brightness | Brightness slider | Adjust screen brightness |
// Commands Turn on the backlight Turn off the backlight Backlight is brightest Backlight is darkest
The initial environment setting is for English recognition, and you can switch to Chinese recognition model or back to English recognition model by following these steps
Chinese recognition environment setup
English recognition environment setup
This chapter introduces setting up the ESP-IDF environment setup, including the installation of Visual Studio and the Espressif IDF plugin, program compilation, downloading, and testing of example programs, to assist users in mastering the development board and facilitating secondary development.
Plugin name | Plugin installation requirement | Version number requirement |
---|---|---|
Espressif IDF | "Install Offline" / "Install Online" | ≥5.3.1 |
①Select the corresponding demo
②Its readme will state what chip the demo applies to (how to use the demo and the file structure are described below, omitted here)
③Click to create the demo
①.ESP-IDF Development Environment Version Manager, when our project requires differentiation of development environment versions, it can be managed by installing different versions of ESP-IDF. When the project uses a specific version, it can be switched to by utilizing it
②.Device flashing COM port, select to flash the compiled program into the chip
③.Select set-target chip model, select the corresponding chip model, for example, ESP32-P4-NANO needs to choose esp32p4 as the target chip
④.menuconfig, click it to Modify sdkconfig configuration file Project configuration details
⑤.fullclean button, when the project compilation error or other operations pollute the compiled content, you can clean up all the compiled content by clicking it
⑥.Build project, when a project satisfies the build, click this button to compile
⑦.Current download mode, the default is UART
⑧.flash button, when a project build is completed, select the COM port of the corresponding development board, and click this button to flash the compiled firmware to the chip
⑨.monitor enable flashing port monitoring, when a project passes through Build --> Flash, click this button to view the log of output from flashing port and debugging port, so as to observe whether the application works normally
⑩.Debug
⑪.Build Flash Monitor one-click button, which is used to continuously execute Build --> Flash --> Monitor, often referred to as "little flame"
CMakeLists.txt
.CMake
first reads the content of the top-level CMakeLists.txt
in the project directory to read the build rules and identify the content to be compiled. When the required components and demos are imported into the CMakeLists.txt
, the compilation tool CMake
will import each content that needs to be compiled according to the index. The compilation process is as follows:Demo | Basic Description |
---|---|
ESP32-S3-LCD-1.85-Test | Test onboard device functionality |
Demo description
Hardware connection
Code analysis
feed_handler
), another for speech command detection and recognition (detect_hander
)Result demonstration
Parameter | Function | Description |
SD Card | Display TF card size | Connect the TF card, if the recognition fails, please format the TF card to FAT32 format (please wait for a while to reset and check again if the recognition fails for the first time) |
Flash Size | Display Flash size | Current onboard 16MB Flash |
Battery Voltage | Battery voltage | The battery voltage can be detected when the battery is connected |
Angular deflection | Display the angular deflection of the board | Display the offset in three directions |
RTC Time | Display RTC time | Display current RTC time If the RTC time is not consistent with the current time, because the data cannot be retained in the power-off state, if you need to keep the RTC time normal, you need to connect the RTC battery and update the RTC time |
Wireless scan | Display the number of scanned WiFi | When it finishes, display Scan Finish at the end |
Backlight brightness | Brightness slider | Adjust screen brightness |
// Commands Turn on the backlight Turn off the backlight Backlight is brightest Backlight is darkest
The initial environment setting is for English recognition, and you can switch to Chinese recognition model or back to English recognition model by following these steps
Comment ① to switch to the English recognition model
Comment ② to switch to the Chinese recognition model
①.Enter python --version and the python version number appears, which means that it is installed
②.Type where python to see where python is installed
The Python environment under the C drive is the Python environment that is automatically installed when VS Code is installed;
The disk E contains the Python environment used in the following steps;
cd /d E:\download\Generate_Chinese_command
python multinet_pinyin.py "Chinese to be converted to Pinyin" Example: Python multinet_pinyin.py "你好微雪电子"
cd /d E:\download\Generate_English_command
python gen_sr_commands.py "English to be converted to phonemes" Example: python gen_sr_commands.py "hello waveshare"
...\ESP32-S3-LCD-1.85-Demo\Firmware
It may be due to Flash blank and the USB port is not stable, you can long-press the BOOT button, press RESET at the same time, and then release RESET, and then release the BOOT button, at this time the module can enter the download mode to flash the firmware (demo) to solve the situation.
①View through Device Manager: Press the Windows + R keys to open the "Run" dialog box; input devmgmt.msc and press Enter to open the Device Manager; expand the "Ports (COM and LPT)" section, where all COM ports and their current statuses will be listed.
②Use the command prompt to view: Open the Command Prompt (CMD), enter the "mode" command, which will display status information for all COM ports.
③Check hardware connections: If you have already connected external devices to the COM port, the device usually occupies a port number, which can be determined by checking the connected hardware.
①Use the dmesg command to view: Open the terminal.
①Use the ls command to view: Enter ls /dev/ttyS* or ls /dev/ttyUSB* to list all serial port devices.
③Use the setserial command to view: Enter setserial -g /dev/ttyS* to view the configuration information of all serial port devices.
Depending on the demo you run, different demos have different refresh frame rates.
No
Whether you use the USB to UART tool to connect the UART pins, or enable USB CDC in Tools
Yes, it can be used simultaneously, but due to the larger memory usage of audio, the audio function cannot be turned on at the same time
3.7V lithium rechargeable battery with PH1.25 2P connector.
Use the one that corresponds to our interface and output voltage, the capacity depending on customer needs
0x15, 0x20, 0x51
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