ESP8266 vs. ESP32

tags: Espressif ESP32 ESP8266

皆為Espressif的芯片, ESP32可視為ESP8266的新版芯片 (可參考 https://www.espressif.com/), ESP32增加了ROM, 也支援外部的RAM與ROM的連接介面

ESP8266 Series - ESP8266EX & ESP8285

• 目前市面上普遍應用ESP8266EX
• Tensilica L106 32-bit RISC MCU (80MHz) & 2.4 GHz Wi-Fi (802.11 b/g/n)
• High-performance 160 MHz single-core CPU
• 160KB RAM
• Support iBus, dBus, AHB interfaces
• Support UART, 17 x GPIO, I2C, I2S, SDIO, 4 x PWM, ADC and SPI interfaces
• 未支援 Bluetooth功能

ESP32 Series

• ESP32種類很多, 目前共有三個Series

  1. ESP32-S series

     • ESP32-S3 series (最新的)
       • 32-bit MCU & 2.4 GHz Wi-Fi & Bluetooth 5 (LE)
       • Xtensa® 32-bit LX7 dual-core processor (240 MHz)
       • 512KB SRAM, 384KB ROM on the chip
       • Support SPI, Dual SPI, Quad SPI, Octal SPI, QPI and OPI interfaces to connect to flash and external RAM
       • Support vector instructions provides acceleration for neural network computing and signal processing workloads
       • Support 44 X GPIOs, SPI, I2S, I2C, PWM, RMT, ADC, DAC and UART, SD/MMC host and TWAITM
       • Reliable security features ensured by RSA-based secure boot, AES-XTS-based flash encryption, the innovative digital signature and the HMAC peripheral, “World Controller”
     • ESP32-S2 series (ESP32-S2)
       • 32-bit MCU & 2.4 GHz Wi-Fi
       • High-performance 240 MHz single-core CPU
       • Ultra-low-power performance: fine-grained clock gating, dynamic voltage and frequency scaling
       • Security features: eFuse、flash encryption, secure boot, signature verification, integrated AES, SHA and RSA algorithms
       • Support 43 X GPIOs, 1 full-speed USB OTG interface, SPI, I2S, UART, I2C, LED PWM, LCD interface, camera interface, ADC, DAC, touch sensor, temperature sensor
       • Availability of common cloud connectivity agents and common product features shortens the time to market
         

  2. ESP32-C3 series

     • 32-bit RISC-V MCU & 2.4 GHz Wi-Fi & Bluetooth 5 (LE)
     • 32-bit RISC-V single-core processor with a four-stage pipeline that operates at up to 160 MHz
     • State-of-the-art power and RF performance
     • 400KB SRAM, 384KB ROM on the chip
     • Support SPI, Dual SPI, Quad SPI, and QPI interfaces that allow connection to flash
     • Reliable security features ensured by RSA-3072-based secure boot, AES-128-XTS-based flash encryption, the innovative digital signature and the HMAC peripheral, hardware acceleration support for cryptographic algorithms
     • Rich set of peripheral interfaces and GPIOs, ideal for various scenarios and complex applications

  3. ESP32-series (ESP32-D0WDQ6)

     • 32-bit MCU & 2.4 GHz Wi-Fi & Bluetooth/Bluetooth LE
     • Two or one CPU core(s) with adjustable clock frequency, ranging from 80 MHz to 240 MHz
     • +19.5 dBm output power ensures a good physical range
     • Classic Bluetooth for legacy connections, also supporting L2CAP, SDP, GAP, SMP, AVDTP, AVCTP, A2DP (SNK) and AVRCP (CT)
     • Support for Bluetooth Low Energy (Bluetooth LE) profiles including L2CAP, GAP, GATT, SMP, and GATT-based profiles like BluFi, SPP-like, etc
     • Bluetooth Low Energy (Bluetooth LE) connects to smart phones, broadcasting low-energy beacons for easy detection
     • Sleep current is less than 5 μA, making it suitable for battery-powered and wearable-electronics applications
     • Peripherals include capacitive touch sensors, Hall sensor, SD card interface, Ethernet, high-speed SPI, UART, I2S and I2C