First: Introduction to ESP32

ESP32 is a WiFi chip launched by Espressif.

With 40nm process, dual-core 32-bit MCU, 2.4GHz dual-mode Wi-Fi and Bluetooth chips, the main frequency is up to 230MHz, and the computing capacity can reach 600DMIPS.

Covers features such as fine resolution clock gating, power saving mode and dynamic voltage adjustment.

It integrates components such as antenna and RF balun, power amplifier, low noise amplifier, filter and power management module, stable performance, easy to manufacture, and operating temperature range from -40°C to 125°C.

Support multiple communication protocols, such as: I2C. I2S. SPI. UART. CAN.

Multiple adjustment management modes: Active mode, Modem-sleep mode, Light-sleep mode, Deep-sleep mode, Hibernation mode. According to different needs, the required program can be adjusted.

Second: the characteristics of ESP32

Immersive gold technology -High cost performance -Small size, easy to embed in other products -Powerful functions support LWIP protocol, Freertos

WiFi supports three modes: AP, STA and AP + STA -Support Windows system (cygwin and msys32) and Linux system

Support Arduino-ide, ESP-IDF, Micropython multiple development environments -Support Lua program, easy development

Third: the application scenarios of ESP32:

Video streaming from camera -OTT set-top box device -Home automation -WIFI voice recognition device

Industrial unlimited control -Health care -Motion detection and anti-lost alarm -Wearable electronics: smart bracelets, smart watches

Fourth: Wi-Fi function

802.11 BGN HT40 WIFI transceiver, baseband, protocol stack and LWIP

802.11n (2.4Ghz), up to 150Mbps -802.11 I security features: each certification and TSN

802.11 e: Multiple queue management, make full use of QoS traffic priority

Wi-Fi Protected Access (WPA) / WPA2 -Wi-Fi Protected Setup (WPS)

A MPDU and A-MSDU aggregation -Segmentation and defragmentation

SSL stack with hardware accelerator -Automatic beacon monitoring/scanning -Infrastructure BSS workstation mode/soft AP mode

Wi-Fi direct connection (P2P), P2P discovery, P2P group owner mode and P2P power management

UMA compatibility and certification -Antenna diversity and selection -WMM power saving U-APSD