Growlink Precision Irrigation Controller Drives 4 Zones from 4 Substrate Sensors
The PIC pairs four SDI-12 sensor inputs with four 24VAC valve outputs on one board. Compatible substrate probes include Growlink TerraLINK, Acclima TDR, and METER TEROS-12 with the adapter cable. Each output is fuse protected at 1A and switches a wet contact to a 24VAC solenoid. Wiring is direct. Strip the cable, terminate three screws per probe, and the controller mounts to a wall near the canopy.
Crop Steering Engine for Dryback, Ramp-Up, and Generative Strategies
Sensor readings feed a crop steering rules engine in the Growlink platform that fires irrigation events on VWC, EC, or time triggers. The mobile app handles dashboards, alerts, and recipe edits from outside the room. Email, text, and push notifications wake up the on-call grower when a zone misses a target. WiFi or Ethernet keeps the unit online, and OTA firmware adds new features without a service visit.
Key Features
- 4 SDI-12 Sensor Inputs: Connects Growlink TerraLINK, Acclima TDR, or METER TEROS-12 (with adapter) substrate probes on a single bus.
- 4 × 24VAC Valve Outputs: Fuse-protected at 1A per channel, switching a wet contact straight to 24VAC solenoid valves.
- WiFi and Ethernet Connectivity: Hardwired CAT5e/CAT6 (non-PoE) or wireless link to the Growlink cloud and mobile app.
- Crop Steering Rules Engine: Fires events on VWC, EC, or time across dryback, ramp-up, and generative bloom strategies.
- Mobile App and Alerts: Growlink iOS and Android dashboards with email, text, and push alerts on missed irrigation targets.
Technical Specifications
| Specification | Value |
|---|---|
| SDI-12 Inputs | 4 (substrate + climate sensors) |
| Output Channels | 4 × 24VAC wet contact |
| Output Protection | 1A fuse per channel |
| Solenoid Compatibility | 24VAC solenoid valves only |
| Substrate Sensors Supported | Growlink TerraLINK, Acclima TDR, METER TEROS-12 (with adapter) |
| Climate Sensor Support | Growlink ESM-3 via SDI-12 |
| Standalone Capacity | 4 substrate + 4 ESM-3 climate sensors |
| Daisy-Chain Capacity | Up to 10 sensors per chain (175 ft max, requires Core controller or IoT Gateway) |
| Network | WiFi + Ethernet (CAT5e/CAT6, non-PoE) |
| Mobile App | Growlink iOS + Android |
| Alerts | Email, text, push (with Growlink subscription) |
| Firmware | OTA updates over WiFi or Ethernet |
| Pump Recommendation | Constant-pressure pump (e.g., DAB) for stable irrigation pressure |