Welcome to a new InTheMail, the series that will touch both your passion for electronics and your bank account at the same time. I’m gonna start with this little board which is an ethernet shield type of module which can bring TCP/IP connectivity to your project via a SPI bus. So this could mean any microcontroller that is able to talk over SPI to this chip can become internet connected. Now ofcourse these days the ESP32 is pretty popular, everyone is using wifi but for the highest reliability in network, wired connections are still preferred and there are also other microcontrollers that do not have a built-in ethernet interface so you need to add it externally with something like this. It’s fairly inexpensive so I think it’s worth keeping one of these around however interfacing to it might not be as trivial so it’s best to stick to the platforms that already have libraries written for this chip, like Arduino. Same as always, you will find a link to this in the description below the video.