Review on 🔧 EEEEE UNO R3 ATMEGA328P ATMEGA16U2 & Multi-Function Shield Starter Kit: Sensor WiFi Relay Bluetooth Module with Digital Display Switches - USB Cable Included - Arduino IDE Compatible by Pamela Hefton

There were some problems with the libraries at first, but in the end they were solved and the product works great, especially at this price! Tips: 1) Libraries - I ended up extracting the files manually and copying them to the Arduino libraries directory. . When I tried to add a library directly from the Aruino Sketch menu - Add Library *.zip I was unsuccessful. I don't know why, but manually extracted and copied to the Ardino library, which solved the issues preventing the sketch from compiling. 2) Use the latest Arduino IDE. I was originally using version 1.06 (really old) and had problems with it even after adding the library manually. Updated to version 1.8.13. Problem solved.