The required foundation for every Growlink LINKS automation build — one hub, full facility control.
The Growlink LINKS 8-Port Device HUB (GL-LINK-HUB) is the mandatory central controller for any LINKS ecosystem build, connecting and powering up to eight LINK devices — canopyLINK, valveLINK, lightLINK, hvacLINK, nutriLINK, batch tankLINK, and more — over standard RJ-45 cable with individually buffered ports rated to 1,000 ft. Every climate, lighting, irrigation, and nutrient device on your floor runs through this single unit, managed remotely via the Growlink App and Growlink OS.
The Growlink LINKS 8-Port Device HUB is the required communication controller at the center of any LINKS ecosystem. Every LINK device — canopyLINK sensor hubs, valveLINK irrigation controllers, digital lightLINKs, hvacLINKs, batch tankLINKs, nutriLINKs, relayLINKs, and powerLINKs — must connect through a HUB to operate within Growlink OS. There is no workaround: the HUB is the prerequisite for every LINKS build.
The unit connects to your local network via hardwired Ethernet (preferred for production environments) or 2.4 GHz Wi-Fi as a fallback. Once online, all downstream LINK devices are managed, monitored, and automated through the Growlink App — with real-time data, alerts, scheduling, and Copilot AI-driven crop steering available from any device.
The HUB is made in the USA, ships with wall-mounting hardware and an included 24VDC 1A power supply, and is ready to register devices from first power-on. An optional DIN rail mounting kit is sold separately for panel-mount installs.
The LINKS HUB is the starting point for any licensed cannabis or hemp facility moving from manual or fragmented control into a unified, data-driven automation platform. Growlink's own documentation identifies three core operator profiles: multi-room facilities that need centralized automation across every grow room, greenhouse operations requiring scalable climate and irrigation control, and premium cultivators stepping up from manual processes into fully automated systems.
For a single-room build, one HUB with the appropriate LINK devices covers climate sensing, substrate monitoring, irrigation, lighting dimming control, and HVAC automation — all in one app. For multi-room facilities, additional HUBs are deployed per zone, each managed within the same Growlink OS account. If port capacity becomes a constraint, canopyLINK Sensor HUBs connect to a single HUB port while freeing up the remaining seven for other device categories, effectively scaling the device count without adding another HUB.
The hardware is rated for operating temps of 10°C–50°C (50–122°F) and up to 75% RH non-condensing. For rooms that run higher sustained humidity, Growlink recommends mounting the HUB outside the grow environment in a sealed enclosure — standard practice for most commercial mechanical room layouts.
Eight individually buffered transceiver ports deliver reliable communication with connected LINK devices at distances up to 1,000 ft over standard unshielded RJ-45 cable — no proprietary cabling required. The buffered port architecture means a wiring or device issue on one port doesn't cascade to others, which matters in facilities where uptime is non-negotiable.
Power delivery runs over the same RJ-45 cable: the 24VDC 1A supply powers both the HUB and its downstream LINK devices with up to 1A of shared current across all eight ports. Network connectivity is dual-mode — hardwired Ethernet via the dedicated master input port for maximum stability, or 2.4 GHz Wi-Fi when hardwired runs aren't practical. A status indicator LED provides at-a-glance confirmation of connectivity state.
Installation is straightforward: standard RJ-45 patch cables, an included power supply, and wall-mounting hardware are all in the box. Register each LINK device sequentially through the Growlink App, and the system is operational. The HUB is compact at 3.75″W × 4.5″H × 1.625″D and weighs under a pound, so it fits in any mechanical closet, wall panel, or junction box without requiring dedicated rack space.
The standard LINKS build sequence starts here: HUB first, then LINK devices added by function and zone. Climate gets covered with a canopyLINK running climaLINK and terraLINK sensors. Lighting dimming and spectrum control runs through a digital lightLINK per zone — supporting major fixture protocols including Matrix, Faven, Fohse, Fluence, and others. Irrigation is handled by valveLINK (eight 24VAC channels per unit). Nutrient management routes through batch tankLINK for tank monitoring or nutriLINK for dosing automation. HVAC automation runs through hvacLINK.
All of these devices report into Growlink OS through the HUB, where Blueprint scheduling and Copilot AI tie environment, substrate, and irrigation data into automated crop-steering decisions. The operator sees one dashboard, one alert system, and one set of historical analytics — not six separate apps.
For operators already running Growlink CORE controllers, the LINKS ecosystem extends that platform with modular, room-by-room device control rather than replacing it. HUBs can operate standalone or alongside existing Growlink CORE units in the same OS account. Contact HSC to spec the right combination of HUBs and LINK modules for your canopy footprint and room count.
| SKU | GL-LINK-HUB |
| Input Power | 24VDC, 1A (Class II / Limited Energy Power Supply included) |
| Device Ports | 8 × RJ-45 (LINK device outputs) |
| Master / Network Port | 1 × RJ-45 (Ethernet to local network) |
| Max Device Current | 1A combined across all 8 ports |
| Signal Range | Up to 1,000 ft per port (individually buffered transceivers) |
| Wireless | 2.4 GHz Wi-Fi (fallback when Ethernet unavailable) |
| Operating Temperature | 10°C–50°C (50°F–122°F) |
| Operating Humidity | Max 75% RH, non-condensing |
| Dimensions | 3.75″W × 4.5″H × 1.625″D (95mm × 114mm × 41mm) |
| Mounting | Wall-mount hardware included; DIN rail kit optional (sold separately) |
| Country of Origin | USA |
The HUB is required for wired LINK devices to operate within Growlink OS. There is no alternate communication path for HUB-connected LINKS hardware — every LINKS build starts with at least one HUB. Some devices like powerLINK connect directly over Wi-Fi and can work alongside HUB-connected devices, but canopyLINK, valveLINK, digital lightLINK, batch tankLINK, nutriLINK, hvacLINK, and relayLINK all require a HUB port.
One HUB supports up to eight LINK devices. To scale beyond eight, deploy additional HUBs — each managed within the same Growlink OS account. You can also use a canopyLINK Sensor HUB on a single HUB port to connect up to eight climate and substrate sensors, freeing the remaining seven HUB ports for other device categories. This is Growlink's recommended approach for high-sensor-count rooms.
The HUB uses standard unshielded RJ-45 (Cat5e/Cat6) cabling for all device connections — no proprietary cable required. Individually buffered transceiver ports maintain signal integrity to connected LINK devices up to 1,000 ft away, which covers virtually any commercial grow room or greenhouse bay layout.
The HUB supports both hardwired Ethernet and 2.4 GHz Wi-Fi for internet connectivity, but an internet connection is required for Growlink OS operation. Ethernet is recommended for production environments where uptime is critical. Wi-Fi is available as a fallback. Note that internet connectivity must remain active — the HUB requires a live connection to the Growlink platform to operate.
Growlink recommends mounting the HUB outside the growing environment — in a mechanical room, hallway, or control panel — where it's accessible for service and away from direct exposure to humidity, condensation, and irrigation spray. If the HUB must be installed inside a grow room, it should be housed in a sealed enclosure. Operating humidity limit is 75% RH non-condensing; for rooms that regularly exceed this, a weatherproof enclosure is required.
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