ESP32-S3-EYE v2.2 [中文] 1. Getting Started 1.1. Overview 1.2. Comparison with ESP-EYE 1.3. Block Diagram 1.4. Components on the ESP32-S3-EYE-MB Main Board 1.5. Components on the ESP32-S3-EYE-SUB Sub Board 1.6. Contents and Packaging 1.6.1. Retail Orders 1.6.2. Wholesale Orders 1.7. Default Firmware and Function Test 2. Start Application Development 2.1. Required Hardware 2.2. Optional Hardware 2.3. Hardware Setup 2.4. Software Setup 3. Hardware Reference 3.1. Notes on GPIO Allocations 3.2. Independent Module and Camera Power Supply 4. Hardware Revision Details 4.1. Revision History 4.2. known Issues 5. Related Documents 5.1. Datasheet 5.2. Schematic 5.3. PCB Layout 5.4. Dimensions 5.5. 3D Printed Case This user guide will help you get started with ESP32-S3-EYE v2.2 and will also provide more in-depth information. Notice If you use ESP32-S3-EYE v2.1, please follow this guide. The differences between v2.2 and v2.1 are described in Section Hardware Revision Details. The ESP32-S3-EYE is a small-sized AI development board produced by Espressif. It is based on the ESP32-S3 SoC and ESP-WHO, Espressif’s AI development framework. It features a 2-Megapixel camera, an LCD display, and a microphone, which are used for image recognition and audio processing. ESP32-S3-EYE offers plenty of storage, with an 8 MB Octal PSRAM and a 8 MB flash. It also supports image transmission via Wi-Fi and debugging through a Micro-USB port. With ESP-WHO, you can develop a variety of AIoT applications, such as smart doorbell, surveillance systems, facial recognition time clock, etc. ESP32-S3-EYE ESP32-S3-EYE The document consists of the following major sections: Getting started: Introduction of the board, block diagram, description of key components, contents and packaging, as well as quick guide to use the board. Start Application Development: Hardware and software setup instructions to flash firmware onto the board. Hardware Reference: More detailed information about the board's hardware. Hardware Revision Details: Hardware revision history, known issues, and links to user guides for previous versions (if any) of the board. Related Documents: Links to related documentation.1. Getting Started1.1. Overview The ESP32-S3-EYE board consists of two parts: the main board (ESP32-S3-EYE-MB) that integrates the ESP32-S3-WROOM-1 module, camera, SD card slot, digital microphone, USB port, and function buttons; and the sub board (ESP32-S3-EYE-SUB) that contains an LCD display. The main board and sub board are connected through pin headers.1.2. Comparison with ESP-EYE The ESP32-S3-EYE has some additional functions comparing to ESP-EYE, an ESP32-based development board. The comparison below covers key differences between the two boards: FeatureESP32-S3-EYEESP-EYE Chip embeddedESP32-S3ESP32 PSRAM8 MB Octal PSRAM8 MB Quad PSRAM Flash8 MB flash4 MB flash LCD displayYesNone AccelerometerYesNone Alternative power supplyExternal battery (optional)None USB-to-UART bridgeNo need. Functionality is provided by ESP32-S3 USB Serial/JTAG interface.Yes Antenna connectorNo need. Antenna is provided by the ESP32-S3-WROOM-1 module.Yes 1.3. Block Diagram The block diagram below presents main components of the ESP32-S3-EYE-MB main board (on the left) and the ESP32-S3-EYE-SUB sub board (on the right), as well as the interconnections between components. ESP32-S3-EYE Block Diagram ESP32-S3-EYE Block Diagram The following sections will describe the key components on the main board and the sub board, respectively.1.4. Components on the ESP32-S3-EYE-MB Main Board ESP32-S3-EYE-MB - front and back ESP32-S3-EYE-MB - front and back The key components of the board are described from front view to back view, starting from the camera, in an anti-clockwise direction. | No. | Key Component | Description | |-----|----|--| | 1 | Camera | The camera OV2640 with 2 million pixels has a 66.5° field of view and a maximum resolution of 1600x1200. You can change the resolution when developing applications.| | 2 | Module Power LED | The LED (green) turns on when USB power is connected to the board. If it is not turned on, it indicates either the USB power is not supplied, or the 5 V to 3.3 V LDO is broken. Software can configure GPIO3 to set different LED statuses (turned on/off, flashing) for different statuses of the board. Note that GPIO3 must be set up in open-drain mode. Pulling GPIO3 up may burn the LED. | | 3 | Pin Headers | Connect the female headers on the sub board.| | 4 | 5 V to 3.3 V LDO | Power regulator that converts a 5 V supply into a 3.3 V output for the module.| | 5 | Digital Microphone | The digital I2S MEMS microphone features 61 dB SNR and –26 dBFS sensitivity, working at 3.3 V.| | 6 | FPC Connector | Connects the main board and the sub board. | | 7 | Function Button | There are six function buttons on the board. Users can configure any functions as needed except for the RST button. | | 8 | ESP32-S3-WROOM-1 | The ESP32-S3-WROOM-1 module embeds the ESP32-S3R8 chip variant that provides Wi-Fi and Bluetooth 5 (LE) connectivity, as well as dedicated vector instructions for accelerating neural network computing and signal processing. On top of the integrated 8 MB Octal SPI PSRAM offered by the SoC, the module also comes with 8 MB flash, allowing for fast data access. ESP32-S3-WROOM-1U module is also supported.| | 9 | MicroSD Card Slot | Used for inserting a MicroSD card to expand memory capacity. | | 10 | 3.3 V to 1.5 V LDO | Power regulator that converts a 3.3 V supply into a 1.5 V output for the camera.| | 11 | 3.3 V to 2.8 V LDO | Power regulator that converts a 3.3 V supply into a 2.8 V output for the camera.| | 12 | USB Port | A Micro-USB port used for 5 V power supply to the board, as well as for communication with the chip via GPIO19 and GPIO20.| 13 | Battery Soldering Points | Used for soldering a battery socket to connect an external Li-ion battery that can serve as an alternative power supply to the board. If you use an external battery, make sure it has built-in protection circuit and fuse. The recommended specifications of the battery: capacity > 1000 mAh, output voltage 3.7 V, input voltage 4.2 V – 5 V.| | 14 | Battery Charger Chip | 1 A linear Li-ion battery charger (ME4054BM5G-N) in ThinSOT package. The power source for charging is the USB Port.| | 15 | Battery Red LED | When the USB power is connected to the board and a battery is not connected, the red LED blinks. If a battery is connected and being charged, the red LED turns on. When the battery is fully charged, it turns off. | | 16 | Accelerometer | Three-axis accelerometer (QMA7981) for screen rotation, etc. |1.5. Components on the ESP32-S3-EYE-SUB Sub Board ESP32-S3-EYE-SUB - front and back ESP32-S3-EYE-SUB - front and back The key components of the board are described from front view to back view, starting from the LCD display, in an anti-clockwise direction. Key ComponentDescription LCD Display1.3” LCD display, connected to ESP32-S3 over the SPI bus. Strapping PinsFour strapping pins led out from the main board. They can be used as testing points. Female HeadersUsed for mounting onto the pin headers on the main board. LCD FPC ConnectorConnects the sub board and the LCD display. LCD_RSTLCD_RST testing point. You can use it to reset the LCD display with control signals. 1.6. Contents and Packaging1.6.1. Retail Orders If you order a few samples, each board comes in an individual box. Each box contains: 1 x ESP32-S3-EYE-MB main board 1 x ESP32-S3-EYE-SUB sub board The main board and sub board are assembled by default. For retail orders, please go to .1.6.2. Wholesale Orders If you order in bulk, the boards come in large cardboard boxes. For wholesale orders, please go to .1.7. Default Firmware and Function Test Each ESP32-S3-EYE board comes with pre-built default firmware that allows you to test its functions including voice wake-up, voice command recognition, face detection and recognition. To test the board's functions, you need the following hardware: 1 x ESP32-S3-EYE 1 x USB 2.0 cable (Standard-A to Micro-B), for USB power supply Before powering up your board, please make sure that it is in good condition with no obvious signs of damage. Both the main board and the sub board should be firmly connected together. Then, follow the instructions described below: Connect the board to a power supply through the USB Port using a USB cable. While the board is powered up, you will notice the following responses: The Module Power LED turns on for a few seconds, indicating that the default firmware is being loaded. The Module Power LED turns off, indicating the default firmware has been loaded. The board enters human face recognition mode by default. The LCD display shows live video streaming. At this point, the board is ready for further instructions. You can control the board with either function buttons or voice commands. Function button control is described first: Face the camera so whole human face is visible on the screen for the board to detect. Once a human face is detected, the board displays a blue rectangle. Press MENU so that the board enters an ID (starting from 1) for a detected human face. Press UP+ so that the board starts face recognition. Once a face is recognized, the board displays the entered face ID. If it doesn’t know the face, it displays “WHO?”. Press PLAY to delete the latest face ID. The board displays "XXX ID(S) LEFT". To control the board with voice commands, follow the instructions below: Complete step 1 described previously and notice responses from the board. Activate the board with the default English wake word “Hi ESP”. When the wake word is detected, the Module Power LED will turn on, indicating that the board is ready for a speech com