databit.me

Compare

Arduino Uno R3 vs Arduino Uno R4 WiFi

Specs side by side, with the best value in each row highlighted. Choose different boards below to build your own comparison.

The short version

  • ›Wi-Fi: only the Arduino Uno R4 WiFi has it.
  • ›Bluetooth LE: only the Arduino Uno R4 WiFi has it.
  • ›Price: the Arduino Uno R4 WiFi is cheaper ($27.50 vs $28).
  • ›Speed: the Arduino Uno R4 WiFi runs faster (48 MHz vs 16 MHz).
  • ›Memory: the Arduino Uno R4 WiFi has more RAM (32 KB vs 2 KB).
  • ›Battery life: the Arduino Uno R4 WiFi sleeps at much lower current (6 mA vs 30 mA).
Specification comparison: Arduino Uno R3, Arduino Uno R4 WiFi
SpecArduino Uno R3Arduino Uno R4 WiFi
ChipATmega328PRenesas RA4M1 + ESP32-S3
CPU8-bit AVRArm Cortex-M4F
Clock16 MHz48 MHz (best)
Wi-Fi—Wi-Fi 4 (802.11 b/g/n, via ESP32-S3) (best)
Bluetooth—Bluetooth 5 (via ESP32-S3) (best)
Zigbee / ThreadNoNo
GPIO2020
ADC channels6 × 10-bit6 × 14-bit
Flash32 KB256 KB (best)
RAM2 KB32 KB (best)
Logic level5 V5 V
Power input7–12V barrel / 5V USB6–24V barrel / 5V USB-C
Deep sleep (typ.)~30 mA~6 mA (best)
Active current (typ.)~45 mA (best)~60 mA
Form factorUnoUno
USBUSB-B (ATmega16U2)USB-C
ProgrammingArduino C++Arduino C++
Price (typ.)$28$27.50 (best)
PinoutInteractive pinout—
Ad space · inline

Buy: Arduino Uno R3

Buy: Arduino Uno R4 WiFi

Affiliate links: databit.me may earn a commission at no extra cost to you. Details.

Popular comparisons