{"product_id":"esp32-wifi-relay-module-ac220v-30a-single-channel-development-board","title":"ESP32 WiFi Relay Module AC220V 30A Single-Channel Dev Board","description":"\n\u003ch2\u003eESP32 Single-Channel AC220V 30A WiFi Relay Module Development Board\u003c\/h2\u003e\n\u003cp\u003eTake your automation and IoT projects to the next level with this ESP32-powered WiFi relay module. Designed for makers, engineers, and developers, this compact development board combines a powerful ESP32 microcontroller with a robust 5V\/30A single-channel relay capable of switching AC220V loads — all in one ready-to-use package.\u003c\/p\u003e\n\n\u003cp\u003eWhether you're building a smart home controller, an industrial automation prototype, or a remote switching application, this board provides everything you need to get started quickly and scale with confidence.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eESP32 Microcontroller:\u003c\/strong\u003e Dual-core processor with integrated WiFi and Bluetooth for versatile wireless connectivity and remote control capability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAC220V Input \u0026amp; Output Support:\u003c\/strong\u003e Built-in AC-to-DC transformer module converts mains power on-board — no external power supply required.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e5V \/ 30A Single-Channel Relay:\u003c\/strong\u003e Heavy-duty relay handles high-current AC loads up to 30A with reliable switching performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUART Burning Support:\u003c\/strong\u003e Reserved UART pin interface makes firmware flashing and secondary development straightforward and convenient.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual IDE Compatibility:\u003c\/strong\u003e Develop using the official ESP-IDF framework or the beginner-friendly Arduino IDE — your choice.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounting Ready:\u003c\/strong\u003e 3.5mm positioning holes allow secure mounting in enclosures or on DIN rails.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e Measures just 47 × 78mm, ideal for space-constrained builds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003cth style=\"text-align:left; padding:8px; border:1px solid #ddd;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"text-align:left; padding:8px; border:1px solid #ddd;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eMicrocontroller\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eESP32\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eRelay Rating\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e5V \/ 30A Single-Channel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eInput \/ Output Voltage\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eAC220V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eConnectivity\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eWiFi + Bluetooth (ESP32)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eDevelopment Interface\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eUART (pins reserved)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eSupported IDEs\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eESP-IDF, Arduino IDE\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eMounting Hole Diameter\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e3.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eBoard Dimensions\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e47 × 78mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eMade in China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× ESP32 Single-Channel AC220V 30A WiFi Relay Module Development Board\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDue to monitor color calibration differences, the actual product color may vary slightly from images.\u003c\/li\u003e\n  \u003cli\u003ePlease allow 1mm–1cm tolerance in dimensions due to manual measurement.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e⚠ Safety Warning:\u003c\/strong\u003e This board operates at mains voltage (AC220V). Always follow proper electrical safety practices during installation. For safety guidelines on working with electrical equipment, refer to \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety Standards\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Can I program this ESP32 relay module using the Arduino IDE?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! This development board fully supports the Arduino IDE in addition to the ESP-IDF framework. The reserved UART pins make it easy to connect a USB-to-serial adapter and flash your firmware directly from your computer.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What types of loads can I control with the AC220V 30A relay?\u003c\/h4\u003e\n\u003cp\u003eA: The 5V\/30A single-channel relay is rated for AC220V, making it suitable for switching high-current appliances such as motors, heaters, lighting circuits, and other mains-powered devices — provided they fall within the 30A current rating.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this board support remote control over WiFi?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. The onboard ESP32 module features integrated WiFi connectivity, enabling you to build remote-control and IoT automation applications that operate over your local network or the internet via custom firmware.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Do I need an external power supply for the ESP32 relay module?\u003c\/h4\u003e\n\u003cp\u003eA: No external power supply is needed. The board includes a built-in AC-to-DC transformer module that converts the AC220V input to the 5V DC required to power the ESP32 and relay circuitry on-board.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Can I program this ESP32 relay module using the Arduino IDE?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! This development board fully supports the Arduino IDE in addition to the ESP-IDF framework. The reserved UART pins make it easy to connect a USB-to-serial adapter and flash your firmware directly from your computer.\"}}, {\"@type\": \"Question\", \"name\": \"What types of loads can I control with the AC220V 30A relay?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The 5V\/30A single-channel relay is rated for AC220V, making it suitable for switching high-current appliances such as motors, heaters, lighting circuits, and other mains-powered devices — provided they fall within the 30A current rating.\"}}, {\"@type\": \"Question\", \"name\": \"Does this board support remote control over WiFi?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Absolutely. The onboard ESP32 module features integrated WiFi connectivity, enabling you to build remote-control and IoT automation applications that operate over your local network or the internet via custom firmware.\"}}, {\"@type\": \"Question\", \"name\": \"Do I need an external power supply for the ESP32 relay module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No external power supply is needed. The board includes a built-in AC-to-DC transformer module that converts the AC220V input to the 5V DC required to power the ESP32 and relay circuitry on-board.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Electronics \u0026 Tech\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/collections\/electronics-tech\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"ESP32 WiFi Relay Module AC220V 30A Single-Channel Dev Board\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/products\/esp32-wifi-relay-module-ac220v-30a-single-channel-development-board\"}]}\u003c\/script\u003e","brand":"Vue","offers":[{"title":"Default Title","offer_id":48749623312576,"sku":"\u003cnone\u003e","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/9338\/7968\/files\/S4532535f472841bb8aa3a122667fd0c72.webp?v=1786207793","url":"https:\/\/vueselect.com\/products\/esp32-wifi-relay-module-ac220v-30a-single-channel-development-board","provider":"Vue","version":"1.0","type":"link"}