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ESP32-S3-EYE is a small-sized AI development board. It is based on the ESP32-S3 SoC and ESP-WHO, Espressif’s AI development framework. The ESP32-S3-EYE board consists of two parts: the main board (ESP32-S3-EYE-MB) features the ESP32-S3-WROOM-1 module, a 2-Megapixel camera, a SD card slot, a digital microphone, a USB port, and function buttons; and the sub board (ESP32-S3-EYE-SUB) integrates an LCD display. The main board and sub board are connected through pin headers. 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. Specifications Camera The 2 MP camera OV2640 has a 66.5° field of view and a maximum resolution of 1600x1200. You can change the resolution when developing applications. 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: GPIO3 must be set up in open-drain mode. Pulling GPIO3 up may burn the LED. Pin Headers Connect the female headers on the sub board. 5 V to 3.3 V LDO Power regulator that converts a 5 V supply into a 3.3 V output for the module. Digital Microphone The digital I²S MEMS microphone features 61 dB SNR and –26 dBFS sensitivity, working at 3.3 V. FPC Connector Connects the main board and the sub board. Function Button There are six function buttons on the board. Users can configure any functions as needed except for the RST button. 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. MicroSD Card Slot Used for inserting a MicroSD card to expand memory capacity. 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. 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. 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. 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. Battery Charger Chip 1 A linear Li-ion battery charger (ME4054BM5G-N) in ThinSOT package. The power source for charging is the USB Port. 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. Accelerometer Three-axis accelerometer (QMA7981) for screen rotation, etc.

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The ESP32-C3 chip has industry-leading low-power performance and radio frequency performance, and supports Wi-Fi IEEE802.11b/g/n protocol and BLE 5.0. The chip is equipped with a RISC-V 32-bit single-core processor with an operating frequency of up to 160 MHz. Support secondary development without using other microcontrollers or processors. The chip has built-in 400 KB SRAM, 384 KB ROM, 8 KB RTC SRAM, built-in 4 MB Flash also supports external Flash. The chip supports a variety of low power consumption working states, which can meet the power consumption requirements of various application scenarios. The chip's unique features such as fine clock gating function, dynamic voltage clock frequency adjustment function, and RF output power adjustable function can achieve the best balance between communication distance, communication rate and power consumption. The ESP-C3-12F module provides a wealth of peripheral interfaces, including UART, PWM, SPI, I²S, I²C, ADC, temperature sensor and up to 15 GPIOs. Features Support Wi-Fi 802.11b/g/n, 1T1R mode data rate up to 150 Mbps Support BLE5.0, does not support classic Bluetooth, rate support: 125 Kbps, 500 Kbps, 1 Mbps, 2 Mbps RISC-V 32-bit single-core processor, supports a clock frequency of up to 160 MHz, has 400 KB SRAM, 384 KB ROM, 8 KB RTC SRAM Support UART/PWM/GPIO/ADC/I²C/I²S interface, support temperature sensor, pulse counter The development board has RGB three-in-one lamp beads, which is convenient for the second development of customers. Support multiple sleep modes, deep sleep current is less than 5 uA Serial port rate up to 5 Mbps Support STA/AP/STA+AP mode and promiscuous mode Support Smart Config (APP)/AirKiss (WeChat) of Android and iOS, one-click network configuration Support serial port local upgrade and remote firmware upgrade (FOTA) General AT commands can be used quickly Support secondary development, integrated Windows and Linux development environment About Flash configuration ESP-C3-12F uses the built-in 4 MB Flash of the chip by default, and supports the external Flash version of the chip.

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