Simple adapter for the popular WIZnet WIZ810MJ product from WIZnet. The  WIZ810MJ module uses a hard-to-find 2mm spaced pin header. This adapter has sockets for the 2mm pins and standard 0.1" pins for plugging the module to standard protoboards and breadboards.

Features:

a) 2mm WIZ810MJ module female sockets
b) SPI mode and reset pins pulled-up with 4.7KOhm resistors
c) In-board Reset switch
d) 6 LEDs (Power, Link Speed, RX, TX, Collision, FDX) with corresponding resistors for debugging purposes
e) 2.54mm spaced header for breadboard or protoboard connectivity

The reset switch, 6 LEDs and 6 LED resistors are optional.

This adapter is for using the WIZ810MJ module in SPI mode.

Header pinout:

1) 3.3V
2) GND
3) MISO
4) MOSI
5) SCLK
6) SS or SCS
7) INT
8) RESET

The WIZ810MJ module has 2 x 28-pin sockets.  Pins 25-28 are unused.  The adapter has 28-pin socket footprint, but 2 24-pin sockets are provided.

WIZ810MJ Module to breadboard Adapter
Parts	Qty	Device
PCB	1	WIZnet Module to breadboard Adapter PCB
J1, J2	2	24-pin female 2mm header compatible with WIZnet Module

Soldering iron, solder and soldering skills, 2 x 4.7 kohm 1/4W resistors.
It is optional to install 6 3mm LEDs, 6 LED resistors (330ohm, 220ohm), reset tactile switch.