Arduino Uno R4 WiFi comes with built-in Wi-Fi and Bluetooth capabilities, along with additional pins and a new, faster processor.

Arduino clone broad, UNO not be able to download ? missing the DTR reset - xiaolaba/UNO-R1-R3-reset-circuitry ...

Only 5V pin, IOREF, and AREF voltage pins are connected. (Vin and 3.3V are not). Speed is 16MHz. Based On ATMEGA328-PU How to use: Set the fuses to arduino fuses Use SPI (ICSP) programmer and load the ...