UNO WiFi R3 Board ATmega328P ESP8266 Dual Processor Arduino Compatible
Arduino-compatible development board with ATmega328P and ESP8266 WiFi. Dual processors, 4 programming modes, micro USB interface. Perfect for IoT projects.
Category: Arduino Compatible Boards
Arduino UNO WiFi R3 Compatible — ATmega328P and ESP8266 Dual Processor
This UNO WiFi board combines the familiar ATmega328P in the standard UNO R3 footprint with an ESP8266 ESP-12E WiFi module, giving the Uno WiFi capability without a separate shield. DIP switches configure which chip has USB access and how the two processors communicate — standalone ATmega, standalone ESP8266, or serial passthrough where the ATmega sends AT commands to the ESP8266 over UART. All standard Uno R3 shields are compatible with the ATmega side of the board.
- ATmega328P at 16MHz — full Uno R3 compatibility
- ESP8266 ESP-12E — 2.4GHz WiFi, AT command firmware
- DIP switch mode selection — standalone ATmega, standalone ESP8266, or passthrough
- CH340G USB interface
- All Uno R3 headers — standard shield compatibility
Best for
WiFi-enabled Uno projects, remote sensor data upload, OTA sketch update via ESP8266, Arduino IoT builds on existing Uno-shield hardware, and learning to combine ATmega and ESP8266 on one board.
Why Kunkune
Shipped from UK stock. 60-day returns, no minimum order. Fast Royal Mail delivery.
Buying in bulk? For orders of 10+ units, contact us for trade pricing.
A final check before payment
Review your options, quantities and the final total before confirming.
Ordering for an occasion
Delivery times are estimates, so leave time before your occasion.
Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.
Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.
View policyIf plans change
Ask the store about your order before making return or refund arrangements.
Please contact us for the refund processing timeframe before returning an item.
View policyPlanning delivery
Review the available services for your destination.
Standard Shipping · United States: $0.00
Express Shipping · United States: $3.99
View policyReturn arrangements
Contact the store first to check the conditions for your item.
United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.
View policy
