{"product_id":"esp32-dual-channel-30a-relay-module-wifi-bluetooth-ac220v","title":"ESP32 Dual-Channel 30A Relay Module WiFi Bluetooth AC220V","description":"\n\u003ch2\u003eESP32 Dual-Channel 30A Relay Module — WiFi \u0026amp; Bluetooth Remote Control\u003c\/h2\u003e\n\u003cp\u003eTake your smart home automation or IoT development projects to the next level with this powerful \u003cstrong\u003eESP32 Dual-Channel 30A Relay Module\u003c\/strong\u003e. Featuring an onboard ESP32 microcontroller with built-in \u003cstrong\u003eWiFi and Bluetooth connectivity\u003c\/strong\u003e, this development board lets you control high-current AC loads wirelessly — right out of the box. Whether you're a hobbyist, maker, or embedded systems developer, this module gives you everything you need to prototype and deploy reliable remote-controlled switching solutions.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose This Relay Module?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-Channel 5V\/30A Relay:\u003c\/strong\u003e Switch two independent AC220V loads with high-current capacity — ideal for appliances, lighting, motors, and more.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOnboard ESP32 Module:\u003c\/strong\u003e Harness the full power of the ESP32 chipset with dual-core processing, built-in WiFi (802.11 b\/g\/n), and Bluetooth for seamless remote control.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAC220V Direct Power Supply:\u003c\/strong\u003e Integrated AC-to-DC transformer module means no external power adapter needed — plug directly into mains power.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUART Pins Reserved:\u003c\/strong\u003e Dedicated UART pin header for easy secondary development, firmware flashing, and serial debugging.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible Development Environment:\u003c\/strong\u003e Compatible with both the \u003cstrong\u003eESP-IDF\u003c\/strong\u003e framework and the beginner-friendly \u003cstrong\u003eArduino IDE\u003c\/strong\u003e — get started quickly with your preferred toolchain.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Mountable:\u003c\/strong\u003e Measures just 93×87mm with 4mm positioning holes for easy enclosure mounting or panel installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMicrocontroller\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eESP32\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWireless\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWiFi (802.11 b\/g\/n) + Bluetooth\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelay Channels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 (Dual-Channel)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelay Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5V \/ 30A per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAC 220V (built-in AC-DC converter)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCommunication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUART (pins reserved)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePositioning Hole Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBoard Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e93 × 87mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIDE Support\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eArduino IDE, ESP-IDF\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× ESP32 Dual-Channel 30A Relay Module \u003cem\u003e(or shell variant — see selected option)\u003c\/em\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDue to monitor\/screen color variations, the actual product color may differ slightly from photos.\u003c\/li\u003e\n  \u003cli\u003ePlease allow 1mm–1cm tolerance due to manual measurement.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSafety notice:\u003c\/strong\u003e This module operates on AC 220V mains voltage. Always follow proper electrical safety practices during installation. For guidance on safe electrical work, refer to \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA's Electrical Safety Guidelines\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What programming environments are compatible with this ESP32 relay module?\u003c\/h4\u003e\n\u003cp\u003eA: This ESP32 dual-channel relay module supports both the \u003cstrong\u003eArduino IDE\u003c\/strong\u003e and the official \u003cstrong\u003eESP-IDF\u003c\/strong\u003e development environment. The reserved UART pins make it straightforward to connect a USB-to-serial adapter for firmware uploads and serial monitoring, so developers at any skill level can get started quickly.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I control this relay module remotely over WiFi or Bluetooth?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The onboard ESP32 chip includes built-in WiFi (802.11 b\/g\/n) and Bluetooth, allowing you to control both relay channels remotely via a smartphone app, MQTT broker, HTTP commands, or any custom firmware you develop. It's perfect for smart home automation, IoT switching, and remote appliance control projects.\u003c\/p\u003e\n\u003ch4\u003eQ: Does this module need an external power supply?\u003c\/h4\u003e\n\u003cp\u003eA: No external power supply is required. The module features a built-in \u003cstrong\u003eAC-to-DC transformer\u003c\/strong\u003e that converts AC 220V mains power directly on the board, simplifying wiring and reducing the number of components needed in your project enclosure.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the maximum current this relay module can handle?\u003c\/h4\u003e\n\u003cp\u003eA: Each relay channel is rated at \u003cstrong\u003e30A at 5V\u003c\/strong\u003e, making it suitable for switching high-current loads such as motors, HVAC systems, industrial lighting, and household appliances connected to an AC 220V circuit.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What programming environments are compatible with this ESP32 relay module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This ESP32 dual-channel relay module supports both the Arduino IDE and the official ESP-IDF development environment. 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