Relationship between ESP32 and ESP32-CAM

ESP32 Introduction

The ESP32 is a family of low-cost, low-power single-chip microcontrollers that integrate Wi-Fi and dual-mode Bluetooth. The ESP32 series uses Tensilica Xtensa LX 6 microprocessors, including dual-core and single-core variants, built-in antenna switches, RF converters, power amplifiers, low noise receiving amplifiers, filters, and power management modules.

The ESP32 was created and developed by Le Xin Information Technology, a Chinese company headquartered in Shanghai, and manufactured by TSMC using 40nm technology. It is the successor to the ESP8266 microcontroller. The ESP32 chip has produced a number of series of modules, respectively, ESP32-S series, ESP32-C series and ESP32 series, the following ESP32 series mainly.

Basic features of the ESP32 include the following:

Processor:

CPU: Xtensa dual-core (or single-core) 32-bit LX6 microprocessor, operating pulse 160/240 MHz, computing power up to 600 DMIPS

Memory:

448 KB ROM (64KB+384KB)

520 KB SRAM

16 KB RTC SRAM, there are two types of SRAM

Supports up to 16 MB external SPI Flash

Supports up to 8 MB external SPI SRAM

Wireless transmission:

Wi-Fi: 802.11b /g/n

Blue bud: v4.2BR /EDR/BLE

External interface:

34 GPIOs

12-bit SAR ADC with up to 18 channels

2 8-bit D/A converters

10 touch sensors

Four SPIs

Two I2S

Two I2C

3 UART

One Host is SD/eMMC/SDIO

1 Slave SDIO/SPI

Ethernet interface with dedicated DMA, supporting IEEE 1588

CAN 2.0

Infrared transmission

Motor PWM

LED PWM, up to 16 channels

The ESP32 module can also be subdivided into the following sub-series:

The ESP32-WROOM series module is based on the ESP32-D0WD dual-core chip design, suitable for applications based on Wi-Fi and Bluetooth connectivity, with powerful dual-core performance.

The ESP32-WROVER series module is based on the ESP32-D0WD dual-core chip design, and its powerful dual-core performance is suitable for applications with large memory requirements, such as a variety of AIoT applications and gateway applications.

The ESP32-MINI series module is based on the ESP32-U4WDH single-core chip design, providing a cost-effective solution for applications based on Wi-Fi and Bluetooth connectivity.

Introduction to ESP32-CAM

ESP32-CAM is a small camera module released by Anco Technology. The module can work independently as the smallest system, the size is only 27×40.5×4.5mm, can be widely used in a variety of Internet of Things occasions, suitable for home intelligent devices, industrial wireless control, wireless monitoring, QR wireless recognition, wireless positioning system signals and other Internet of Things applications, is the ideal solution for Internet of Things applications.

peculiarity

Based on the ESP32-WROVER series, the processor is ESP32-D0WD

Low power dual-core 32-bit CPU, can be used as an application processor

Ultra-small 802.11b/g/n Wi-Fi + BT/BLE SoC module

The main frequency is up to 240MHz, and the computing power is up to 600 DMIPS

520 KB of internal SRAM and 8MB of external PSRAM

Supports interfaces such as UART/SPI/I2C/PWM/ADC/DAC

OV2640 and OV7670 cameras with built-in flash

Support picture WiFI upload

TF card support

Supports multiple sleep modes.

Embedded Lwip and FreeRTOS

Support STA/AP/STA+AP working mode

Supports Smart Config/AirKiss one-click network distribution

Supports serial local and remote firmware upgrades (FOTA)