{"product_id":"original-arduino-uno-r4-wifi-board-india","title":"Original Arduino UNO R4 WiFi Board - India","description":"\u003ch1\u003eOriginal Arduino UNO R4 WiFi\u003c\/h1\u003e\n\u003cp\u003eThe Arduino UNO R4 WiFi brings 32-bit performance, wireless connectivity, and an on‑board LED matrix to the classic UNO form factor. It combines a Renesas RA4M1 microcontroller with an Espressif ESP32‑S3 module for Wi‑Fi and Bluetooth® Low Energy, making it ideal for connected projects. With backward‑compatible shield headers and USB‑C, it’s a direct upgrade for any UNO‑based maker board.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMicrocontroller\u003c\/td\u003e\n\u003ctd\u003eRenesas RA4M1 (Arm Cortex‑M4 @ 48 MHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWireless Module\u003c\/td\u003e\n\u003ctd\u003eESP32‑S3 (Wi‑Fi 802.11 b\/g\/n, Bluetooth 5.0)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFlash Memory\u003c\/td\u003e\n\u003ctd\u003e256 KB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSRAM\u003c\/td\u003e\n\u003ctd\u003e32 KB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDigital I\/O Pins\u003c\/td\u003e\n\u003ctd\u003e14 (6 PWM output)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAnalog Input Pins\u003c\/td\u003e\n\u003ctd\u003e6 (14‑bit resolution)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWi‑Fi‑controlled 12×8 LED matrix display\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eIoT weather station that uploads data to the cloud\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-bluetooth-controlled-car\"\u003eBluetooth‑controlled robot car\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eHome automation relay hub with BLE smartphone control\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe board is fully pin‑compatible with standard UNO R3 shields. Most 5 V logic shields work directly, but shields that tap I2C or SPI on the ESP32‑S3 may need 3.3 V level translation. It programs through Arduino IDE 2.0 and pairs seamlessly with popular sensor modules, motor drivers, and relay boards.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eUse the USB‑C port on the RA4M1 side for power and programming. The Vin pin accepts 6–24 V DC from external supplies, regulated to 5 V and 3.3 V onboard. The 12×8 LED matrix is driven via an internal serial interface—no extra wiring needed. Keep total current draw below 200 mA when powered from USB.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino UNO R3 shields?\u003c\/summary\u003e\u003cp\u003eYes, the physical headers and pinout match UNO R3. Some shields that use SPI or I2C may require library tweaks because the ESP32‑S3 handles wireless communication on the same buses; check the shield’s logic voltage levels for compatibility.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I program the ESP32‑S3 directly?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The ESP32‑S3 appears as a separate USB‑C port when you connect a second cable. You can program it using the Arduino ESP32 core, allowing custom firmware on the wireless module while the RA4M1 runs your main sketch.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat library controls the built‑in LED matrix?\u003c\/summary\u003e\u003cp\u003eThe Arduino_UNO_R4_LED_Matrix library (included with the board package) handles the 12×8 red LED grid. You can display scrolling text, icons, or simple animations with just a few lines of code.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445110137197,"sku":"CDN-0437","price":1400.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_c6fd6f9f-2358-4f40-8eb5-626f86d801b1.jpg?v=1781513369","url":"https:\/\/compoden.com\/products\/original-arduino-uno-r4-wifi-board-india","provider":"Compoden","version":"1.0","type":"link"}