The Arduino UNO R4 boasts a 3x performance increase over the UNO R3 and , in addition, SRAM has been upgraded from 2kB to 32kB, and flash memory from 32kB to 256kB to support more complex projects.

While there have been other boards bearing the name ‘Arduino Uno WiFi’ over the years, a lot has changed in the world of tiny radio modules and 8-bit microcontrollers over the past few years.