Wiznet chips W5100, W5200 and W5500 are automatically detected.
Efficient block mode of W5200 & W5500 are used for data and multi-byte register access.
Wiznet socket registers are cached, which greatly reduces SPI communication overhead, at the cost of a small increase in RAM usage. TCP connections and UDP packets accessed in small chunks typically see a substantial performance boost.
Adafruit's Ethernet.init(CSPIN) extension is supported, to allow use of different pins for the chip select signal. Optimized direct register I/O is used for most Arduino compatible boards.
http://www.pjrc.com/teensy/td_libs_Ethernet.html
| Board | Chip | Shield / Module | Internet | Local |
|---|---|---|---|---|
| Teensy 3.6 | W5500 | WIZ850io | 1142.40 | |
| Teensy 3.6 | W5200 | WIZ820io | 1100.50 | |
| Teensy 3.6 | W5100 | WIZ811MJ | ||
| Teensy 3.2 | W5500 | WIZ850io | 955.60 | |
| Teensy LC | W5500 | WIZ850io | 479.97 | |
| Teensy 2.0 | W5100 | WIZ811MJ | ||
| Arduino MKR1000 | W5500 | MKR ETH | 324.14 | |
| Arduino Uno R3 | W5500 | Seeed Ethernet | 342.35 | |
| Arduino Uno R3 | W5100 | Arduino Ethernet R3 | ||
| Arduino Uno R3 | W5100 | Ethernet R2 (clone) | ||
| Arduino Due | W5100 | Arduino Ethernet R3 | ||
| Arduino Due | W5500 | Seeed Ethernet | 696.62 | |
| Arduino Zero | W5500 | Seeed Ethernet | 344.42 | |
| Arduino 101 | W5500 | Seeed Ethernet | 359.62 | |
| ChipKit Uno32 | W5500 | Seeed Ethernet | 860.66 | |
| Mega 2560 | W5500 | Seeed Ethernet | 337.02 | |
| Mega 2560 | W5100 | Ethernet R3 | ||
| ESP8266 Feather | W5500 | Featherwing Ethernet | 608.68 | |
| ESP32 Feather | W5500 | Featherwing Ethernet | 964.03 |
ESP8266 & ESP32 require edit to SPI.h to add SPI.transfer(data, size) esp8266/Arduino#2677 espressif/arduino-esp32#1623