KEYESTUDIO W5100 Ethernet Shield Without POE for Arduino R3 Mega 2560, Wiznet W5100 Ethernet Network Micro SD Card Slot for Arduino to Internet

Came bundled with the Keyestudio Uno R3 and both work perfectly. The printing on top of the board (pin numbers, etc.) are a little harder to read than on boards from another manufacturer, but a bright light and a magnifier helped. This is a good product at a good price and I will buy these again.

Used this to get an arduino talking to an industrial plc over modicon modbus tcp, possibilities are endless for custom sensors etc, description mentions that all these boards have the same Mac, if it causes me problems or I'm unable to change it will update and lower my review.

keyestudio W5100 Ethernet Shield for Arduino came nicely packed without any damage. This ethernet shield will allow Arduino Mega 2560/ UNO R3 to connect to the internet. And this ethernet shield based on the Wiznet W5100 ethernet chip. Using the Ethernet library we can write sketches which connect to the internet using the shield.This ethernet shield contains a micro-SD Card slot which can be used to store files for serving over the network.

I bought the cheaper Smraza board sold on Amazon and it did not work so I returned it and bought another Smraza. The second one did not work, either, so I returned it, too. This one works perfectly!

Arrived in good condition.

Running the test code - worked great. Tested my code, worked twice then quit responding. Went back to the test code. It would not run.

As long as you don't put a micro SD card into the board it works okay. With a uSD card the Ethernet stops working after a handful of transactions, then the board has to be power cycled to get the Ethernet back. So, only half the board is working. 2.5 stars, rounded up because Amazon.

Works great.