Review on Sunfounder R3 + Ethernet Shield W5100 Compatible With Arduino Mega2560 Mega328 by Justin Hollins

Obvious SunFounder error - NULL documentation. 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, 0 V version it worked perfectly. Otherwise it would be 0 stars. BTW, CS for an SD card on pin 4 will interfere with any device using 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.