Review on 🌐 SunFounder Ethernet Shield W5100: The Perfect Connectivity Solution for Arduino R3 Mega 2560 1280 A057 by Corey Krull

There is clearly ZERO documentation with SunFounder. Do you think they even put the circuit on their website? No, they rather advertise their IoT cloud. And I bought two of these at once and a few months later another Mega 2560 from another source. In all devices, the 5.0V register was filled with a 3.3V chip! Luckily, Revain refunded my money with no fuss. For another dollar you can get an Elegoo device with proper paperwork, pins marked on the straps! etc. By the way, contacting the supplier and Sunfounder, even their forum, did not bring any results even after a few weeks. After replacing AMS1117 with the 5.0V version, it worked fine. Otherwise it would be 0 stars. By the way, CS for an SD card on pin 4 interferes with any device that uses the data bus, e.g. B. a TFT display. You need to cut the trace to a contact and redirect the CS to a free contact in your application e.g. B. Pin 53 in Mega.