spi2 话题在 GitHub 上没有填写简介，这里按 Star 数汇总最相关的热门仓库。
Simple Ethernet library for AVR, AVR Dx, Portenta_H7, Teensy, SAM DUE, SAMD21, SAMD51, STM32F/L/H/G/WB/MP1, nRF52 and RASPBERRY_PI_PICO boards using Ethernet shields W5100, W5200, W5500, W5100S, W6100. With this library you can use the Arduino Ethernet (shield or board) to connect to Internet to provides both Client and server functionalities.
MQTT, MQTT_over_WebSockets and Secured MQTT_over_WebSockets Client for Arduino. Supporting nRF52, SAMD21, SAMD51, STM32F/L/H/G/WB/MP1, Teensy, SAM DUE, RP2040-based boards, besides ESP8266, ESP32 (ESP32, ESP32_S2, ESP32_S3 and ESP32_C3) and WT32_ETH01. Ethernet shields W5100, W5200, W5500, ENC28J60, Teensy 4.1 NativeEthernet/QNEthernet.
3-D visualizations for SPI2 systems.