{"product_id":"uno-r3-wifi-atmega328p-esp8266-ch340g-32mb-arduino","title":"UNO R3 + WiFi Development Board — ATmega328P + ESP8266, CH340G, 32MB Flash, Arduino","description":"\u003ch2\u003eUNO R3 + WiFi Development Board — ATmega328P + ESP8266, CH340G, 32MB Flash\u003c\/h2\u003e\n\n\u003cp\u003eThis \u003cstrong\u003eUNO R3 + WiFi board\u003c\/strong\u003e combines the ATmega328P microcontroller of the Arduino UNO with an ESP8266 WiFi module on a single board — giving you the familiar Arduino UNO environment plus WiFi connectivity without needing a separate WiFi shield. The ATmega328P handles Arduino sketches and I\/O while the ESP8266 manages WiFi communication. A DIP switch selects the operating mode: Arduino only, ESP8266 only, or Arduino + ESP8266 serial communication. The CH340G USB chip provides USB programming for both processors.\u003c\/p\u003e\n\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMCU:\u003c\/strong\u003e ATmega328P @ 16MHz (Arduino UNO compatible)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWiFi:\u003c\/strong\u003e ESP8266 (802.11 b\/g\/n, 2.4GHz)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlash:\u003c\/strong\u003e 32MB (ESP8266)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUSB Chip:\u003c\/strong\u003e CH340G\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eForm Factor:\u003c\/strong\u003e Arduino UNO compatible\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -40°C to +85°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMode Selection:\u003c\/strong\u003e DIP switch for ATmega\/ESP8266\/combined modes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eOperating Modes (DIP Switch)\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eArduino mode:\u003c\/strong\u003e Program ATmega328P as standard Arduino UNO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eESP8266 mode:\u003c\/strong\u003e Program ESP8266 directly via USB (Arduino IDE or AT commands)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCombined mode:\u003c\/strong\u003e ATmega328P communicates with ESP8266 via UART — Arduino controls WiFi via AT commands\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eWiFi-enabled Arduino UNO project without extra shield\u003c\/li\u003e\n  \u003cli\u003eArduino + ESP8266 MQTT IoT node\u003c\/li\u003e\n  \u003cli\u003eWeb server controlled by Arduino logic\u003c\/li\u003e\n  \u003cli\u003eWiFi data logger with Arduino sensor reading\u003c\/li\u003e\n  \u003cli\u003eLearning platform for both Arduino and ESP8266\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eUNO R3 + WiFi board — ATmega328P + ESP8266, CH340G, 32MB flash for Arduino IDE WiFi IoT projects without a separate WiFi shield.\u003c\/p\u003e","brand":"Keszoox","offers":[{"title":"1SET UNO WIFI R3","offer_id":46991464562923,"sku":"14:350852#1SET UNO WIFI R3","price":22.36,"currency_code":"USD","in_stock":true},{"title":"UNO WIFI R3","offer_id":46991464595691,"sku":"14:1202#UNO WIFI R3","price":20.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/uno-r3-wifi-atmega328p-esp8266-32mb-usb-ttl-ch340g.webp?v=1761720135","url":"https:\/\/keszoox.com\/products\/uno-r3-wifi-atmega328p-esp8266-ch340g-32mb-arduino","provider":"Keszoox","version":"1.0","type":"link"}