{"id":6105,"date":"2025-06-01T16:02:16","date_gmt":"2025-06-01T16:02:16","guid":{"rendered":"https:\/\/technolabelectronics.com\/?post_type=product&p=6105"},"modified":"2025-12-09T13:21:37","modified_gmt":"2025-12-09T13:21:37","slug":"6105","status":"publish","type":"product","link":"https:\/\/technolabelectronics.com\/?product=6105","title":{"rendered":"8-Channel Home-Automation PCB, Model-SMT8N25 (fully assembled)"},"content":{"rendered":"

Deploy home automation in minutes. Our\u00a0 8-Channel Home-Automation PCB \u2014 Model SMT8N25<\/strong> packs everything you need\u2014controller, safety circuitry, and expansion headers\u2014onto a compact board that slips straight behind a standard wall switch. Just flash your firmware, wire the loads, and connect to the cloud platform of your choice.<\/p>\n

Key Features<\/strong><\/h2>\n
    \n
  • Model<\/strong> SMT8N25<\/li>\n
  • Eight independent AC relays<\/strong>\u00a0for lights, fans, sockets, and more<\/li>\n
  • ESP32-WROOM on board<\/strong>\u2014dual-core MCU with Wi-Fi + BLE<\/li>\n
  • Ready for popular IoT clouds<\/strong>: Blynk, ESP-RainMaker, KME Smart, CADIO, Arduino IoT Cloud<\/li>\n
  • USB-C programming port<\/strong>\u00a0with auto-reset; no external programmer required<\/li>\n
  • On-board safety<\/strong>: fast-blow fuse and optocoupler isolation between mains and logic<\/li>\n
  • Plug-in headers<\/strong>\u00a0(JST-XH) for local switches, DHT temperature-humidity sensor, IR receiver, and buzzer<\/li>\n
  • Exposed expansion pins<\/strong>: UART TX\/RX, 3.3 V, 5 V, and GND<\/li>\n
  • Heavy-duty screw terminals<\/strong>\u00a0resist arcing and heat<\/li>\n
  • Full silkscreen labeling<\/strong>\u2014relay outputs, sensor headers, and GPIO map printed on the underside<\/li>\n
  • Slim footprint<\/strong>: 142 mm \u00d7 70 mm<\/strong>\u2014fits neatly behind 6- or 8-gang switch plates<\/li>\n<\/ul>\n

    Technical Specifications<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Parameter<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
    Microcontroller<\/td>\nEspressif ESP32-WROOM-32E, 240 MHz, 4 MB Flash<\/td>\n<\/tr>\n
    Relay Channels<\/td>\n8 \u00d7 SPST-NO mechanical relays<\/td>\n<\/tr>\n
    Relay Rating*<\/td>\n250 VAC \/ 10 A max \u00a0\u00b7\u00a0 30 VDC \/ 10 A max<\/td>\n<\/tr>\n
    Logic Supply<\/td>\n5 V DC (on-board buck converter from mains)<\/td>\n<\/tr>\n
    Programming Interface<\/td>\nUSB Type-C (CP2102N auto-reset)<\/td>\n<\/tr>\n
    Protection<\/td>\n1 A fast-blow fuse, optocoupler isolation<\/td>\n<\/tr>\n
    Sensor Headers<\/td>\n3-pin JST-XH for DHT; 3-pin JST-XH for IR<\/td>\n<\/tr>\n
    Switch Inputs<\/td>\n8 \u00d7 3-pin JST-XH (active-low)<\/td>\n<\/tr>\n
    Extra I\/O<\/td>\nUART TX, UART RX, 3.3 V, 5 V, GND, buzzer header<\/td>\n<\/tr>\n
    Dimensions<\/td>\n142 mm (L) \u00d7 70 mm (W) \u00d7 18 mm (H) (without terminals)<\/td>\n<\/tr>\n
    Weight<\/td>\n78 g \u00b1 5 g<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Package Contents<\/h2>\n
      \n
    • 1 \u00d7 ESP32 8-Channel Home-Automation PCB, Model SMT8N25 (fully assembled )<\/li>\n<\/ul>\n

      Add this board to your next smart-home project and unlock seamless control\u2014locally or from the cloud.<\/p>\n","protected":false},"excerpt":{"rendered":"

        \n
      • Model SMT8N25<\/strong> \u2013 ESP32-based 8-channel relay board for smart-home projects<\/li>\n
      • Controls up to 8 AC appliances<\/strong>; heavy-duty screw terminals resist arcing<\/li>\n
      • Built-in ESP32-WROOM<\/strong> with Wi-Fi + BLE; ready for Blynk, ESP-RainMaker, KME Smart, CADIO, Arduino IoT Cloud<\/li>\n
      • USB-C programming port<\/strong> (CP2102N auto-reset) \u2014 no external programmer needed<\/li>\n
      • On-board safety features:<\/strong> fast-blow fuse + optocoupler isolation between mains and logic<\/li>\n
      • Plug-and-play JST headers<\/strong> for wall switches, DHT sensor, IR receiver, and buzzer<\/li>\n
      • Exposed UART, 3.3 V, 5 V, GND<\/strong> pins for easy expansion<\/li>\n
      • Slim 142 \u00d7 70 mm<\/strong> PCB fits behind standard 6-\/8-gang switch plates<\/li>\n<\/ul>\n","protected":false},"featured_media":6110,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[237],"product_tag":[686,694,689,692,696,456,693,387,685,698,639,684,695,702,703,697,690,699,683,700,687,701,682,691,688],"class_list":{"0":"post-6105","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-automation-pcbs","7":"product_tag-8-channel-relay","8":"product_tag-arduino-iot-cloud","9":"product_tag-bluetooth-low-energy","10":"product_tag-blynk","11":"product_tag-cadio-platform","12":"product_tag-diy-electronics","13":"product_tag-esp-rainmaker","14":"product_tag-esp32","15":"product_tag-esp32-relay-board","16":"product_tag-fuse-protected-pcb","17":"product_tag-home-automation","18":"product_tag-iot","19":"product_tag-kme-smart-cloud","20":"product_tag-maker-project","21":"product_tag-open-source-hardware","22":"product_tag-optocoupler-safety","23":"product_tag-pcb-design","24":"product_tag-smart-appliance-control","25":"product_tag-smart-home","26":"product_tag-smart-home-india","27":"product_tag-smart-switch","28":"product_tag-smt8n25","29":"product_tag-technolab-electronics","30":"product_tag-usb-c-board","31":"product_tag-wifi-automation","33":"first","34":"instock","35":"taxable","36":"shipping-taxable","37":"purchasable","38":"product-type-simple"},"acf":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=\/wp\/v2\/product\/6105","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=\/wp\/v2\/product"}],"about":[{"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6105"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=\/wp\/v2\/media\/6110"}],"wp:attachment":[{"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6105"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_brand&post=6105"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_cat&post=6105"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/technolabelectronics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_tag&post=6105"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}