{"product_id":"esp8266-wifi-4-channel-relay-module-esp-12f-development-board","title":"ESP8266 ESP-12F WiFi 4-Channel Relay Module Dev Board","description":"\n\u003ch2\u003eESP8266 WiFi 4-Channel Relay Module with ESP-12F \u0026amp; AC-DC Switching Power Supply\u003c\/h2\u003e\n\u003cp\u003eTake your home automation and IoT projects to the next level with this versatile \u003cstrong\u003eESP8266 ESP-12F WiFi 4-Channel Relay Development Board\u003c\/strong\u003e. Built around the proven ESP-12F module with 4MB FLASH, it combines wireless connectivity, flexible power input, and four independently controllable relay outputs — all on a single, compact board. Made in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eESP-12F WiFi Module:\u003c\/strong\u003e Mature, stable design with large-capacity 4MB FLASH for reliable wireless performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull I\/O Breakout:\u003c\/strong\u003e All I\/O ports and UART programming pins are fully exposed for easy secondary development and expansion.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide-Range AC-DC Power Supply:\u003c\/strong\u003e On-board switching supply supports AC 90–250V, DC 7–30V, and 5V input — powers itself directly from mains or DC sources.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4× 5V Relay Outputs:\u003c\/strong\u003e Each relay can switch loads up to AC 250V \/ DC 30V — ideal for controlling lights, appliances, and other devices.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOn-Board Reset Button:\u003c\/strong\u003e Instantly restart the WiFi module without disconnecting power.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eArduino \u0026amp; Eclipse Compatible:\u003c\/strong\u003e Supports Arduino IDE and Eclipse development environments; reference programs for Arduino are included.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStatus Indicators:\u003c\/strong\u003e Power LED, 1× programmable LED, and per-relay status indicators for at-a-glance monitoring.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Power Consumption:\u003c\/strong\u003e Efficient design suitable for always-on automation deployments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInterface \u0026amp; Relay Terminal Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eProgramming Port:\u003c\/strong\u003e Connect ESP8266's GND, RX, TX, and 5V to your TTL serial module's GND, TX, RX, and 5V respectively. Set IO0 to GND before uploading firmware; disconnect IO0 from GND after download is complete.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRelay Output Terminals:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNC (Normally Closed):\u003c\/strong\u003e Shorted to COM when the relay is inactive; open when engaged.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCOM (Common):\u003c\/strong\u003e Shared reference terminal.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNO (Normally Open):\u003c\/strong\u003e Open when relay is inactive; shorted to COM when engaged.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSetting Up the Arduino IDE\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eInstall Arduino IDE version 1.8.9 or newer.\u003c\/li\u003e\n  \u003cli\u003eGo to \u003cem\u003eFile \u0026gt; Preferences\u003c\/em\u003e and add the following URL under \u003cstrong\u003eAdditional Board Manager URLs\u003c\/strong\u003e:\u003cbr\u003e\u003ccode\u003ehttp:\/\/arduino.esp8266.com\/stable\/package_esp8266com_index.json\u003c\/code\u003e\n\u003c\/li\u003e\n  \u003cli\u003eNavigate to \u003cem\u003eTools \u0026gt; Board \u0026gt; Board Manager\u003c\/em\u003e, search for \u003cstrong\u003eESP8266\u003c\/strong\u003e, and install version 2.5.2 or latest.\u003c\/li\u003e\n  \u003cli\u003eSelect \u003cstrong\u003eESPINO (ESP-12 Module)\u003c\/strong\u003e as the target board.\u003c\/li\u003e\n  \u003cli\u003eConnect IO0 to GND, select the correct COM port, click \u003cstrong\u003eUpload\u003c\/strong\u003e, and let the IDE compile and flash automatically.\u003c\/li\u003e\n  \u003cli\u003eDisconnect IO0–GND, then press the reset button or re-power the board to run your program.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× ESP8266 ESP-12F WiFi 4-Channel Relay Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eExplore More Tools \u0026amp; Accessories\u003c\/h3\u003e\n\u003cp\u003eLooking for more project essentials? Check out our \u003ca href=\"\/products\/airtight-transparent-pet-storage-bottle-craft-beads-home-organization\"\u003eAirtight Transparent PET Storage Bottle\u003c\/a\u003e for organizing components, or our \u003ca href=\"\/products\/stainless-steel-ceramic-trimming-tool-curved-skip-knife\"\u003eStainless Steel Ceramic Trimming Tool\u003c\/a\u003e for precision hobby work.\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What power sources does the ESP8266 4-Channel Relay Module support?\u003c\/h4\u003e\n\u003cp\u003eA: The on-board AC-DC switching power supply supports a wide input range — AC 90–250V, DC 7–30V, and direct 5V input — making it compatible with standard mains wiring as well as most bench power supplies and DC adapters.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I use this relay module with the Arduino IDE?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The ESP-12F chip is fully compatible with Arduino IDE (version 1.8.9+) and Eclipse. Simply add the ESP8266 board package via the Board Manager and select ESPINO (ESP-12 Module) as your target board. Reference programs for the Arduino environment are provided.\u003c\/p\u003e\n\u003ch4\u003eQ: What loads can each relay control?\u003c\/h4\u003e\n\u003cp\u003eA: Each of the four 5V relays is rated to switch loads up to AC 250V \/ DC 30V, making them suitable for controlling household appliances, lighting circuits, motors, and similar devices.\u003c\/p\u003e\n\u003ch4\u003eQ: Do I need extra hardware to program the board?\u003c\/h4\u003e\n\u003cp\u003eA: Yes, a TTL serial module (such as an FT232) is required to upload firmware. Connect the serial module to the board's UART programming port, set IO0 to GND during upload, then disconnect IO0 and reset the board to run your code.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What power sources does the ESP8266 4-Channel Relay Module support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The on-board AC-DC switching power supply supports a wide input range — AC 90–250V, DC 7–30V, and direct 5V input — making it compatible with standard mains wiring as well as most bench power supplies and DC adapters.\"}}, {\"@type\": \"Question\", \"name\": \"Can I use this relay module with the Arduino IDE?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The ESP-12F chip is fully compatible with Arduino IDE (version 1.8.9+) and Eclipse. Simply add the ESP8266 board package via the Board Manager and select ESPINO (ESP-12 Module) as your target board. Reference programs for the Arduino environment are provided.\"}}, {\"@type\": \"Question\", \"name\": \"What loads can each relay control?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Each of the four 5V relays is rated to switch loads up to AC 250V \/ DC 30V, making them suitable for controlling household appliances, lighting circuits, motors, and similar devices.\"}}, {\"@type\": \"Question\", \"name\": \"Do I need extra hardware to program the board?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, a TTL serial module (such as an FT232) is required to upload firmware. Connect the serial module to the board's UART programming port, set IO0 to GND during upload, then disconnect IO0 and reset the board to run your code.\"}}]}\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:\/\/gf1krb-by.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/gf1krb-by.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"ESP8266 ESP-12F WiFi 4-Channel Relay Module Dev Board\", \"item\": \"https:\/\/gf1krb-by.myshopify.com\/products\/esp8266-wifi-4-channel-relay-module-esp-12f-development-board\"}]}\u003c\/script\u003e","brand":"NIFTY","offers":[{"title":"4-Channel","offer_id":67882462642400,"sku":"14:29#4-Channel","price":35.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0831\/5384\/6496\/files\/Sdcec8fc3d4b34bb2af407cb89a3fc72dO.webp?v=1791773015","url":"https:\/\/niftyshopmart.com\/products\/esp8266-wifi-4-channel-relay-module-esp-12f-development-board","provider":"NIFTY","version":"1.0","type":"link"}