[solved] SainSmart W5100 Network Module (not shield) pinout needed

Hi everyone,

I ordered this module and simply cannot find a pinout for it... it is a 2x28-pin-interface. Either I am asking Google the wrong questions or I am the first to ever buy one of those g http://www.sainsmart.com/arduino/sainsmart-w5100-network-module-tcp-ip-ethernet-module-for-arduino.html

If anybody could direct me to an information where the 3v3, Gnd, MISO, MOSI, SCK and CS pins are located that would be great.

Thanks in advance!


I wonder if it is a clone of the ermicro board: http://www.ermicro.com/blog/?p=1773

Hi there,

thanks for your reply. The Wiznet WZ830MJ board (2nd from the left in the first image in the mentioned blog) looks stunningly similar, however it does have a W5300 chip and a 16/8 bit bus interface (no SPI). I checked the Wiznet page and other datasheets from them but did not find a W5100 module with a similar "two 2.54mm pitch 2 x 14 header pin" interface. Both the amazon article page as well as several seller posts on ebay claim that the SainSmart module has SPI though...

I contacted SainSmart as well as the amazon seller for help on the datasheet but did not yet get any replies- I'll keep you posted.

Having a hard time believing that I am the first guy which actually tries to do something with this module...

Cheers Blueish

Hi, me again-

the Amazon seller replied with a link to a zip file with the unbelievable size of 425MB… after downloading I found the entire schematics for a STM32 board with TFT display and bells and whistles and whatnots…

After rooting through the files I found the following piece of wisdom inside a huge diagram which answered my question. Case closed.

Cheers Blueish