{"product_id":"arduino-uno-wifi-r3-atmega328p-node-mcu-esp8266-ch340g-compatible-board","title":"Arduino UNO+WiFi R3 ATmega328P+Node MCU ESP8266 CH340G Compatible Board","description":"\u003cmeta name=\"description\" content=\"Buy Arduino UNOWiFi R3 ATmega328PNode MCU ESP8266 CH340G Compati online in India at best price from The Engineer Store, Bengaluru. Authentic product, 7-day warranty on manufacturing defects, fast delivery across India.\"\u003e\n\u003ch1\u003eArduino UNO+WiFi R3 ATmega328P+NodeMCU ESP8266 CH340G Compatible Board\u003c\/h1\u003e\n\u003cp\u003eThe ultimate 2-in-1 development board combining the power of Arduino UNO R3 (ATmega328P) and NodeMCU ESP8266 WiFi module on a single PCB. Featuring a CH340G USB-to-serial converter and onboard DIP switches for seamless mode switching, this board eliminates the need for separate shields or wiring. Ideal for IoT projects, home automation, and wireless sensor networks. Available from The Engineer Store, Bengaluru with fast shipping, 7-day warranty on manufacturing defects, and dedicated technical support.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoard Type\u003c\/td\u003e\n\u003ctd\u003eArduino UNO + WiFi Combo Development Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMCU 1\u003c\/td\u003e\n\u003ctd\u003eATmega328P (Arduino UNO R3 Compatible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMCU 2\u003c\/td\u003e\n\u003ctd\u003eESP8266 (NodeMCU WiFi Module)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUSB-to-Serial Chip\u003c\/td\u003e\n\u003ctd\u003eCH340G\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V (ATmega328P) \/ 3.3V (ESP8266)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e7-12V DC (via barrel jack) \/ 5V USB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital I\/O Pins (ATmega328P)\u003c\/td\u003e\n\u003ctd\u003e14 (6 PWM capable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Input Pins\u003c\/td\u003e\n\u003ctd\u003e6 (A0-A5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eESP8266 GPIO Pins\u003c\/td\u003e\n\u003ctd\u003eAvailable via onboard headers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlash Memory (ATmega328P)\u003c\/td\u003e\n\u003ctd\u003e32 KB (0.5 KB used by bootloader)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlash Memory (ESP8266)\u003c\/td\u003e\n\u003ctd\u003e4 MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSRAM (ATmega328P)\u003c\/td\u003e\n\u003ctd\u003e2 KB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClock Speed (ATmega328P)\u003c\/td\u003e\n\u003ctd\u003e16 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClock Speed (ESP8266)\u003c\/td\u003e\n\u003ctd\u003e80 MHz \/ 160 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiFi Standard\u003c\/td\u003e\n\u003ctd\u003e802.11 b\/g\/n (2.4 GHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiFi Security\u003c\/td\u003e\n\u003ctd\u003eWPA\/WPA2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMode Selection\u003c\/td\u003e\n\u003ctd\u003e8-position DIP switch for serial routing and mode control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Modes\u003c\/td\u003e\n\u003ctd\u003eArduino standalone, ESP8266 standalone, Arduino+ESP8266 cooperative\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUSB Connector\u003c\/td\u003e\n\u003ctd\u003eMicro-USB \/ USB Type-B (varies by version)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoard Dimensions\u003c\/td\u003e\n\u003ctd\u003e~68.6 x 53.4 mm (UNO R3 form factor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eArduino IDE, ESP8266 Arduino Core, Lua (NodeMCU firmware)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eHigh-Quality Compatible Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e7-day warranty on manufacturing defects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupport\u003c\/td\u003e\n\u003ctd\u003eEmail \u0026amp; WhatsApp 24\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-in-1 Integrated Design:\u003c\/strong\u003e ATmega328P and ESP8266 on a single board - no external WiFi shields, jumper wires, or breadboard connections needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDIP Switch Mode Control:\u003c\/strong\u003e Onboard 8-position DIP switches let you instantly switch between Arduino-only mode, ESP8266-only mode, and combined cooperative mode without rewiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Arduino UNO R3 Compatibility:\u003c\/strong\u003e Standard UNO R3 pinout and form factor supports existing shields, libraries, and thousands of Arduino sketches out of the box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in WiFi (802.11 b\/g\/n):\u003c\/strong\u003e ESP8266 provides reliable 2.4 GHz wireless connectivity with TCP\/IP stack for IoT, cloud communication, and web server applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCH340G USB-to-Serial:\u003c\/strong\u003e Reliable USB interface for programming both the ATmega328P and ESP8266 directly from the Arduino IDE via a single USB cable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Processor Communication:\u003c\/strong\u003e ATmega328P and ESP8266 can communicate via serial (UART), enabling the Arduino to handle sensors\/actuators while ESP8266 manages WiFi and cloud connectivity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Power Options:\u003c\/strong\u003e Power via USB, DC barrel jack (7-12V), or Vin pin - onboard voltage regulators provide stable 5V and 3.3V rails for both processors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArduino IDE Support:\u003c\/strong\u003e Program both microcontrollers using the familiar Arduino IDE with ESP8266 board package - no additional software required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eDIP Switch Configuration Guide\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMode\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDIP Switch Settings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eArduino Standalone\u003c\/td\u003e\n\u003ctd\u003eSW1-SW2 ON, others OFF\u003c\/td\u003e\n\u003ctd\u003eUSB connects to ATmega328P for programming and serial monitor. ESP8266 is idle.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eESP8266 Standalone\u003c\/td\u003e\n\u003ctd\u003eSW3-SW4 ON, others OFF\u003c\/td\u003e\n\u003ctd\u003eUSB connects to ESP8266\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen will I receive my order?\u003c\/summary\u003e\n\u003cp\u003eProducts ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs technical support available?\u003c\/summary\u003e\n\u003cp\u003eYes, 24\/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is your return policy?\u003c\/summary\u003e\n\u003cp\u003e7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre bulk discounts available?\u003c\/summary\u003e\n\u003cp\u003eYes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003ch2\u003eBuy Arduino UNO+WiFi R3 ATmega328P+Node MCU ESP8266 CH340G Compatible Board Online in India\u003c\/h2\u003e\n\u003cp\u003ePurchase the \u003cstrong\u003eArduino UNO+WiFi R3 ATmega328P+Node MCU ESP8266 CH340G Compatible Board\u003c\/strong\u003e online at \u003ca href=\"https:\/\/theengineerstore.in\"\u003eThe Engineer Store\u003c\/a\u003e - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on \u003cstrong\u003eArduino UNO+WiFi R3 ATmega328P+Node MCU ESP8266 CH340G Compatible Board\u003c\/strong\u003e with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.\u003c\/p\u003e\n\u003cp\u003eLooking to buy \u003cstrong\u003eArduino UNO+WiFi R3 ATmega328P+Node MCU ESP8266 CH340G Compatible Board\u003c\/strong\u003e at the best price in India? The Engineer Store offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.\u003c\/p\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":43773716856995,"sku":"TES-EV102430","price":590.55,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/4479\/7091\/products\/ezgif.com-gif-maker_92.jpg?v=1701074064","url":"https:\/\/www.theengineerstore.in\/zh-hant\/products\/arduino-uno-wifi-r3-atmega328p-node-mcu-esp8266-ch340g-compatible-board","provider":"The Engineer Store","version":"1.0","type":"link"}