{"product_id":"kincony-b4-programmable-smart-relay-controller","title":"KinCony B4 4-Channel Programmable Smart Relay Controller","description":"\u003cstyle\u003e\n  .size-guide-table {\n    width: 100%;\n    border-collapse: collapse;\n    font-family: Arial, sans-serif;\n    font-size: 14px;\n    text-align: left;\n    background: white;\n  }\n  .size-guide-table th, \n  .size-guide-table td {\n    border: 1px solid #ddd;\n    padding: 10px;\n  }\n  .size-guide-table th {\n    background-color: #f5f5f5;\n    font-weight: bold;\n    text-align: center;\n  }\n  .size-guide-title {\n    font-size: 18px;\n    font-weight: bold;\n    margin-bottom: 10px;\n    text-align: left;\n  }\n\u003c\/style\u003e\n\u003cp\u003eBuild your smart home with the versatile B4 Controller, a 4-channel relay controller that blends traditional switching with modern sensing. Powered by the ESP32-S3, this DIN-rail mountable device gives you reliable control over lights, garage doors, or pumps, while also offering analog and digital inputs to connect sensors. It’s the perfect all-rounder for home automation projects where you need both outputs and the ability to monitor the environment.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eWhy You'll Love This Controller\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e✔ \u003cstrong\u003eThe Versatile Automation Hub\u003c\/strong\u003e\u003cbr\u003eGet 4 relay outputs, 4 analog inputs, 4 digital inputs, and 7 sensor ports in one compact device. It’s ready for almost any DIY automation task.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e✔ \u003cstrong\u003eDual-Platform Control, Zero Hassle\u003cbr\u003e\u003c\/strong\u003eUse the Tuya App for instant remote access from your phone, while seamlessly integrating with Home Assistant for advanced local automations. Both work together perfectly.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e✔ \u003cstrong\u003eBuilt for Real-World Reliability\u003cbr\u003e\u003c\/strong\u003eDesigned with opto-isolated inputs (good for long wire runs), a precise RTC for time-based rules, and even manual override buttons for fail-safe operation.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e✔ \u003cstrong\u003eLog, Learn, and Expand\u003cbr\u003e\u003c\/strong\u003eLog sensor data to the SD card, add temperature sensors via 1-Wire, or connect industrial gear via RS-485. The hardware grows with your project.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e✔ \u003cstrong\u003eYour Code, Your Rules\u003cbr\u003e\u003c\/strong\u003eWhether you prefer the easy KCS v3 firmware (with local IFTTT), ESPHome, Tasmota, or writing your own code in Arduino, the choice is yours. No vendor lock-in.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eAmong other outstanding features are the following:\u003cbr\u003e\u003cbr\u003e\n\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCompact and Professional Enclosure\u003c\/strong\u003e: Housed in a sturdy 115x83x56mm case with standard DIN-rail mounting, it integrates neatly into any electrical panel.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDual-Network Connectivity\u003c\/strong\u003e: Includes both Wi-Fi and 100Mbps Ethernet for flexible and reliable network integration, ensuring your controller stays online.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePrecise Time-Stamping \u0026amp; Logging\u003c\/strong\u003e: Features a high-precision DS3231 RTC chip (with battery backup) for accurate time-based events and a microSD card slot for logging data like sensor readings or energy usage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eManual Override Buttons\u003c\/strong\u003e: Includes physical buttons for each relay output, allowing you to turn loads on or off manually even if the software or network is down – a critical feature for maintenance or emergencies.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMulti-Platform Software Support\u003c\/strong\u003e: Use the powerful KCS v3 firmware (with local IFTTT logic), flash it with ESPHome or Tasmota, or write your own code in Arduino or ESP-IDF.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications:\u003cbr\u003e\u003cbr\u003e\n\u003c\/h4\u003e\n\u003ctable style=\"width: 100%;\" class=\"size-guide-table\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 20.2604px;\"\u003e\n\u003cth style=\"width: 22.9649%; height: 20.2604px;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eCategory\u003c\/span\u003e\u003c\/th\u003e\n\u003cth style=\"width: 69.4889%; height: 20.2604px;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eSpecification\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 20.2604px;\"\u003e\n\u003ctd style=\"width: 22.9649%; height: 20.2604px;\"\u003eCore Processor\u003c\/td\u003e\n\u003ctd style=\"width: 69.4889%; height: 20.2604px;\"\u003eESP32-S3-WROOM-1U (N16R8, dual‑core 32‑bit Xtensa LX7)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 40.5208px;\"\u003e\n\u003ctd style=\"width: 22.9649%; height: 40.5208px;\"\u003eDigital Outputs\u003c\/td\u003e\n\u003ctd style=\"width: 69.4889%; height: 40.5208px;\"\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, San Francisco, Segoe UI, Roboto, Helvetica Neue, sans-serif;\"\u003e4× relays\u003cbr\u003e▪ Contact: COM, NO\u003cbr\u003e▪ Max load: 250 VAC \/ 30 VDC, 7 A per channel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 40.5208px;\"\u003e\n\u003ctd style=\"width: 22.9649%; height: 40.5208px;\"\u003eAnalog Inputs\u003c\/td\u003e\n\u003ctd style=\"width: 69.4889%; height: 40.5208px;\"\u003e4× 16‑bit ADC\u003cbr\u003e▪ 2× 0–5 VDC\u003cbr\u003e▪ 2× 4–20 mA (loop‑powered)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 40.5208px;\"\u003e\n\u003ctd style=\"width: 22.9649%; height: 40.5208px;\"\u003eDigital Inputs\u003c\/td\u003e\n\u003ctd style=\"width: 69.4889%; height: 40.5208px;\"\u003e4× dry contact, opto‑isolated\u003cbr\u003e▪ Cable length: up to 500 m (dependent on installation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.9649%;\"\u003eDigital I\/O (GPIO)\u003c\/td\u003e\n\u003ctd style=\"width: 69.4889%;\"\u003e▪ 3× 1‑Wire interface (with pull‑up)\u003cbr\u003e▪ 4× free GPIO (direct to ESP32, no pull‑up)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 40.5208px;\"\u003e\n\u003ctd style=\"width: 22.9649%; height: 40.5208px;\"\u003eWireless Connectivity\u003c\/td\u003e\n\u003ctd style=\"width: 69.4889%; height: 40.5208px;\"\u003e▪ Wi‑Fi 2.4 GHz (802.11 b\/g\/n)\u003cbr\u003e▪ Bluetooth 5.0 (BLE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 40.5208px;\"\u003e\n\u003ctd style=\"width: 22.9649%; height: 40.5208px;\"\u003eIoT Platform\u003c\/td\u003e\n\u003ctd style=\"width: 69.4889%; height: 40.5208px;\"\u003eTuya‑compatible (via Wi‑Fi\/Bluetooth)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 40.5208px;\"\u003e\n\u003ctd style=\"width: 22.9649%; height: 40.5208px;\"\u003eWired Connectivity \u003c\/td\u003e\n\u003ctd style=\"width: 69.4889%; height: 40.5208px;\"\u003e▪ Ethernet: 100M RJ45 (IPv4\/IPv6)\u003cbr\u003e▪ RS485\u003cbr\u003e▪ USB‑C (power\/programming)\u003cbr\u003e▪ I²C (expansion)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.9649%;\"\u003eOnboard Peripherals\u003c\/td\u003e\n\u003ctd style=\"width: 69.4889%;\"\u003e▪ RTC: DS3231 (battery socket)\u003cbr\u003e▪ Display: SSD1306 128×64 OLED (I²C)\u003cbr\u003e▪ Storage: microSD card socket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20.2604px;\"\u003e\n\u003ctd style=\"width: 22.9649%; height: 20.2604px;\"\u003ePower Supply\u003c\/td\u003e\n\u003ctd style=\"width: 69.4889%; height: 20.2604px;\"\u003e12 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20.2604px;\"\u003e\n\u003ctd style=\"width: 22.9649%; height: 20.2604px;\"\u003eDimensions\u003c\/td\u003e\n\u003ctd style=\"width: 69.4889%; height: 20.2604px;\"\u003e115 × 83 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.9649%;\"\u003eMounting\u003c\/td\u003e\n\u003ctd style=\"width: 69.4889%;\"\u003e35 mm DIN rail (EN 60715)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"KinCony","offers":[{"title":"Default Title","offer_id":53898665492852,"sku":"B4","price":90.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/0333\/2212\/files\/N1_cbe38525-6e9e-4fe0-8be7-7befa2b97c9b.png?v=1773934810","url":"https:\/\/www.feedcurrent.com\/products\/kincony-b4-programmable-smart-relay-controller","provider":"FeedCurrent","version":"1.0","type":"link"}