{"product_id":"the-grid-sentinel-gp4-wlte-4g-iot-controller","title":"The Grid Sentinel | GP4-WLTE Industrial 4G IoT Controller with RS485 \u0026 Analog I\/O","description":"\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"The Grid Sentinel | GP4-WLTE Industrial 4G IoT Controller with RS485 \u0026 Analog I\/O\",\n  \"description\": \"The GP4-WLTE is a global 4G LTE industrial IoT controller featuring 4-channel relay outputs, RS485 Modbus, 4-20mA analog inputs, and SMS\/app-based remote control for mission-critical automation.\",\n  \"sku\": \"8778502340831\",\n  \"mpn\": \"8778502340831\",\n  \"image\": \"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sb9824c83f1a64af4a4b82da505b78806q.webp?v=1724204890\",\n  \"brand\": {\"@type\": \"Brand\", \"name\": \"East Supplier Platform\"},\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"url\": \"https:\/\/eastsupplier.com\/products\/the-grid-sentinel-gp4-wlte-4g-iot-controller\",\n    \"priceCurrency\": \"USD\",\n    \"price\": \"207.99\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"itemCondition\": \"https:\/\/schema.org\/NewCondition\"\n  }\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"product-narrative\" style=\"max-width:800px; margin:0 auto; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; color:#2d2d2d; line-height:1.8;\"\u003e\n\n\u003cp style=\"font-size:18px; font-weight:600; color:#1a3a5c; margin-bottom:25px;\"\u003eIn the modern industrial landscape, control is not a luxury. It is the architecture of reliability — the invisible lattice that separates operational excellence from costly downtime.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eGP4-WLTE\u003c\/strong\u003e is engineered for a single purpose: to give you command over remote industrial assets as if you were standing in front of them. Whether it is a pump station three hundred kilometers away, a greenhouse environmental system running on solar, or a distributed water treatment network spanning an entire province — this controller collapses distance into a notification on your phone.\u003c\/p\u003e\n\n\u003cp\u003eAt its core, the GP4-WLTE integrates \u003cstrong\u003e4G LTE global cellular connectivity\u003c\/strong\u003e with a full industrial I\/O suite: four 10-amp relay outputs for heavy-load switching, four 4-20mA analog inputs for precision sensor telemetry, and an RS485 Modbus interface for integration with your existing SCADA or PLC infrastructure. It speaks the universal language of industrial automation — and it speaks it over the air, anywhere on the planet where a cellular tower exists.\u003c\/p\u003e\n\n\u003cp\u003eWhat makes the Grid Sentinel fundamentally different from consumer-grade IoT gadgets is its \u003cstrong\u003emulti-channel redundancy\u003c\/strong\u003e. You are not limited to a single cloud platform. The GP4-WLTE communicates simultaneously via SMS commands, a dedicated mobile application, and a built-in web server accessible through any browser. If the cloud goes dark, SMS still works. If the cell tower is congested, the local web interface still responds. This is not a device that bets everything on one connection — it hedges across every available channel, because in industrial control, a single point of failure is not an edge case. It is an inevitability waiting to happen.\u003c\/p\u003e\n\n\u003c\/div\u003e\n\n\u003chr style=\"margin: 30px 0; border: 0; border-top: 1px solid #d0d8e0;\"\u003e\n\n\u003cdiv class=\"product-features\" style=\"max-width:800px; margin:0 auto; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; color:#2d2d2d;\"\u003e\n\n\u003ch3 style=\"color:#1a3a5c; font-size:20px; border-bottom: 2px solid #2d6da4; padding-bottom:8px;\"\u003eCore Capabilities\u003c\/h3\u003e\n\n\u003cdiv style=\"display:grid; grid-template-columns:1fr 1fr; gap:20px; margin:20px 0;\"\u003e\n\u003cdiv style=\"border-left:3px solid #2d6da4; padding-left:15px;\"\u003e\n\u003cstrong style=\"color:#1a3a5c;\"\u003eGlobal 4G LTE\u003c\/strong\u003e\n\u003cp style=\"font-size:14px; color:#555;\"\u003eWorks on GSM networks worldwide (USA, Canada, Mexico, Australia, NZ, Korea, Japan, Europe, Southeast Asia). Not region-locked.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:3px solid #2d6da4; padding-left:15px;\"\u003e\n\u003cstrong style=\"color:#1a3a5c;\"\u003e4-Channel Relay Output\u003c\/strong\u003e\n\u003cp style=\"font-size:14px; color:#555;\"\u003e10A rated relays for direct control of pumps, valves, motors, lights, and heavy industrial loads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:3px solid #2d6da4; padding-left:15px;\"\u003e\n\u003cstrong style=\"color:#1a3a5c;\"\u003e4-20mA Analog Inputs\u003c\/strong\u003e\n\u003cp style=\"font-size:14px; color:#555;\"\u003eConnect industrial sensors — pressure, temperature, level, flow — for real-time telemetry and threshold-based alerts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:3px solid #2d6da4; padding-left:15px;\"\u003e\n\u003cstrong style=\"color:#1a3a5c;\"\u003eRS485 Modbus\u003c\/strong\u003e\n\u003cp style=\"font-size:14px; color:#555;\"\u003eIntegrate with existing PLC, SCADA, and industrial automation systems over industry-standard Modbus RTU protocol.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:3px solid #2d6da4; padding-left:15px;\"\u003e\n\u003cstrong style=\"color:#1a3a5c;\"\u003eTriple-Channel Control\u003c\/strong\u003e\n\u003cp style=\"font-size:14px; color:#555;\"\u003eSMS commands + mobile app + built-in web server. Three independent control paths — no single point of failure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:3px solid #2d6da4; padding-left:15px;\"\u003e\n\u003cstrong style=\"color:#1a3a5c;\"\u003eCE Certified\u003c\/strong\u003e\n\u003cp style=\"font-size:14px; color:#555;\"\u003eCompliant with European safety and EMC standards. Ready for deployment in regulated industrial environments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color:#1a3a5c; font-size:20px; border-bottom: 2px solid #2d6da4; padding-bottom:8px; margin-top:30px;\"\u003eApplication Scenarios\u003c\/h3\u003e\n\n\u003ctable style=\"width:100%; border-collapse:collapse; margin:15px 0; font-size:14px;\"\u003e\n\u003ctr style=\"background:#f0f5fa;\"\u003e\n\u003ctd style=\"padding:12px; border-bottom:1px solid #d0d8e0; font-weight:600;\"\u003eRemote Pump Control\u003c\/td\u003e\n\u003ctd style=\"padding:12px; border-bottom:1px solid #d0d8e0;\"\u003eWater treatment, irrigation, and oil\/gas pump stations — switch on\/off via SMS or app from anywhere\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px; border-bottom:1px solid #d0d8e0; font-weight:600;\"\u003eGreenhouse Automation\u003c\/td\u003e\n\u003ctd style=\"padding:12px; border-bottom:1px solid #d0d8e0;\"\u003eMonitor temperature\/humidity via 4-20mA sensors, trigger ventilation and irrigation relays based on thresholds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0f5fa;\"\u003e\n\u003ctd style=\"padding:12px; border-bottom:1px solid #d0d8e0; font-weight:600;\"\u003eDistributed SCADA\u003c\/td\u003e\n\u003ctd style=\"padding:12px; border-bottom:1px solid #d0d8e0;\"\u003eRS485 Modbus integration bridges legacy industrial equipment to modern cellular IoT infrastructure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px; border-bottom:1px solid #d0d8e0; font-weight:600;\"\u003eSmart Grid \/ Energy\u003c\/td\u003e\n\u003ctd style=\"padding:12px; border-bottom:1px solid #d0d8e0;\"\u003eMonitor and switch solar inverters, battery banks, and grid-tie relays with programmable logic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0f5fa;\"\u003e\n\u003ctd style=\"padding:12px; border-bottom:1px solid #d0d8e0; font-weight:600;\"\u003eSecurity \u0026amp; Access\u003c\/td\u003e\n\u003ctd style=\"padding:12px; border-bottom:1px solid #d0d8e0;\"\u003eRemote gate\/barrier control with sensor feedback — industrial-grade access management over cellular\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"color:#1a3a5c; font-size:20px; border-bottom: 2px solid #2d6da4; padding-bottom:8px; margin-top:30px;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cdiv style=\"margin:15px 0;\"\u003e\n\u003cp\u003e\u003cstrong style=\"color:#1a3a5c;\"\u003eQ: Will this work in my country?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"color:#555; font-size:14px;\"\u003eThe GP4-WLTE-GA variant supports global GSM\/LTE bands including USA (AT\u0026amp;T, T-Mobile), Canada, Mexico, Australia, New Zealand, Korea, Japan, and most European and Southeast Asian countries. Verify local 4G band compatibility with your carrier.\u003c\/p\u003e\n\n\u003cp style=\"margin-top:15px;\"\u003e\u003cstrong style=\"color:#1a3a5c;\"\u003eQ: Can I control it entirely via SMS without internet?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"color:#555; font-size:14px;\"\u003eYes. SMS commands are a first-class control channel. You can query status, toggle relays, and receive threshold alerts entirely through text messages — no data plan, no app, no cloud dependency required.\u003c\/p\u003e\n\n\u003cp style=\"margin-top:15px;\"\u003e\u003cstrong style=\"color:#1a3a5c;\"\u003eQ: How do the 4-20mA analog inputs work?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"color:#555; font-size:14px;\"\u003eEach of the four channels accepts industry-standard 4-20mA current loop signals from sensors (pressure transducers, temperature probes, level sensors). Configure high\/low alarm thresholds in the app and receive SMS alerts when readings exceed your set limits.\u003c\/p\u003e\n\n\u003cp style=\"margin-top:15px;\"\u003e\u003cstrong style=\"color:#1a3a5c;\"\u003eQ: Is there an API for custom integration?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"color:#555; font-size:14px;\"\u003eThe built-in web server provides HTTP endpoints for relay control and status queries. RS485 Modbus RTU enables direct PLC\/SCADA integration. Contact us for API documentation and integration guidance.\u003c\/p\u003e\n\n\u003cp style=\"margin-top:15px;\"\u003e\u003cstrong style=\"color:#1a3a5c;\"\u003eQ: What power supply does it require?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"color:#555; font-size:14px;\"\u003eThe GP4-WLTE operates on 12-24V DC power. Typical power consumption is under 3W in active mode, making it suitable for solar-powered remote installations.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color:#1a3a5c; font-size:20px; border-bottom: 2px solid #2d6da4; padding-bottom:8px; margin-top:30px;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\n\u003ctable style=\"width:100%; border-collapse:collapse; font-size:14px;\"\u003e\n\u003ctr style=\"background:#f0f5fa;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600; width:40%;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eGP4-WLTE (4G Global Version)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600;\"\u003eCellular\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003e4G LTE GSM (Global Bands) + 2G Fallback\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0f5fa;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600;\"\u003eRelay Outputs\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003e4 Channels, 10A @ 250VAC \/ 30VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600;\"\u003eAnalog Inputs\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003e4 Channels, 4-20mA Current Loop\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0f5fa;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600;\"\u003eSerial Interface\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eRS485 Modbus RTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600;\"\u003eControl Channels\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eSMS, Mobile App (Android\/iOS), Built-in Web Server\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0f5fa;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600;\"\u003ePower Supply\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003e12-24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:600;\"\u003eCertification\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eCE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-gallery\" style=\"margin-top:40px; text-align:center; max-width:800px; margin-left:auto; margin-right:auto;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sb9824c83f1a64af4a4b82da505b78806q.webp?v=1724204890\" alt=\"GP4-WLTE 4G IoT Controller\" style=\"width:100%; max-width:600px; margin:10px auto; display:block; border-radius:4px;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sb0fc4d73710e49e0ab3006ba92199297W.webp?v=1724204890\" alt=\"GP4-WLTE 4G IoT Controller\" style=\"width:100%; max-width:600px; margin:10px auto; display:block; border-radius:4px;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S40e60dae020441b8b98cfea7a77991ccE.webp?v=1724204890\" alt=\"GP4-WLTE 4G IoT Controller\" style=\"width:100%; max-width:600px; margin:10px auto; display:block; border-radius:4px;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S79c7a6a60467477a954c588afc806094C.webp?v=1724204890\" alt=\"GP4-WLTE 4G IoT Controller\" style=\"width:100%; max-width:600px; margin:10px auto; display:block; border-radius:4px;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sd4fe789e04b24337bf3c03ec00399cc0J.webp?v=1724204890\" alt=\"GP4-WLTE 4G IoT Controller\" style=\"width:100%; max-width:600px; margin:10px auto; display:block; border-radius:4px;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S957042cc57f544009a20912fbf494e01h.webp?v=1724204890\" alt=\"GP4-WLTE 4G IoT Controller\" style=\"width:100%; max-width:600px; margin:10px auto; display:block; border-radius:4px;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sb0a563dab06e47f39571d8c35485917cP.webp?v=1724204890\" alt=\"GP4-WLTE 4G IoT Controller\" style=\"width:100%; max-width:600px; margin:10px auto; display:block; border-radius:4px;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S7a3c842d3de44f94b81d3bcf3412ce67f.webp?v=1724204890\" alt=\"GP4-WLTE 4G IoT Controller\" style=\"width:100%; max-width:600px; margin:10px auto; display:block; border-radius:4px;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S8a3c872280e94897a3d63ee4ebaf4a69C.webp?v=1724204890\" alt=\"GP4-WLTE 4G IoT Controller\" style=\"width:100%; max-width:600px; margin:10px auto; display:block; border-radius:4px;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sd3ba7b2be3204a5599062d4fec36c6a02.webp?v=1724204890\" alt=\"GP4-WLTE 4G IoT Controller\" style=\"width:100%; max-width:600px; margin:10px auto; display:block; border-radius:4px;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/fix_0_9ab97dfc-4672-4116-9967-65e26da52d2d.jpg?v=1780536046\" alt=\"GP4-WLTE 4G IoT Controller\" style=\"width:100%; max-width:600px; margin:10px auto; display:block; border-radius:4px;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/fix_0_3fc8f098-75c1-44af-bf74-e554757635c5.jpg?v=1780536049\" alt=\"GP4-WLTE 4G IoT Controller\" style=\"width:100%; max-width:600px; margin:10px auto; display:block; border-radius:4px;\" loading=\"lazy\"\u003e\n\u003c\/div\u003e","brand":"East Supplier Platform","offers":[{"title":"GP4-WLTE-GA","offer_id":46250727768287,"sku":"1005006284883131-GP4-WLTE-GA","price":207.99,"currency_code":"USD","in_stock":true},{"title":"GP4-WLTE-EA","offer_id":46250727801055,"sku":"1005006284883131-GP4-WLTE-EA","price":224.99,"currency_code":"USD","in_stock":false},{"title":"GP4-WLTE-EC","offer_id":46250727833823,"sku":"1005006284883131-GP4-WLTE-EC","price":238.99,"currency_code":"USD","in_stock":false},{"title":"GP4-WLTE-GC","offer_id":46250727866591,"sku":"1005006284883131-GP4-WLTE-GC","price":238.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sb9824c83f1a64af4a4b82da505b78806q.webp?v=1724204890","url":"https:\/\/eastsupplier.com\/fr-pt\/products\/the-grid-sentinel-gp4-wlte-4g-iot-controller","provider":"EastSupplier Platform","version":"1.0","type":"link"}