C. Portwig
Software Engineer
Farms · Mine sites · Legacy equipment
Industrial & Agricultural IOT That Works Anywhere
Devices with optional LoRa connectivity built for the real world - remote farms, mine sites, and legacy equipment. Monitor, control, and automate with confidence, kilometres from the nearest cell tower.
Live platform data
Real Readings. Real Devices. Right Now.
Every number below reflects actual sensor data flowing through the GreyLink platform across farms, mines, and industrial sites.
- Sensor datapoints
- —
- Total readings stored on the platform
- Tracked parameters
- —
- Distinct sensor types monitored
- LoRa range direct LOS
- 10km+
- Battery life on sensors
- 2yr
- Starting price per device
- R450+
- Historical uptime
- 99.99%
Pre-Made Devices
Drop them in and start collecting data from day one.
Purpose-built IOT devices with optional LoRa connectivity for industrial and agricultural operations.
01Agriculture02Industrial03Industrial04Agriculture & Industrial05Industrial
Borehole Monitoring
Real-time water level, flow rate, and borehole/pump temperature - solar powered with direct cellular upload and optional radio modules.
Temperature Sensors
Industrial temperature nodes for cold storage, silos, server rooms and process equipment - available on Wi-Fi, LoRa, Standard Radio, and Cellular.
Power Meters
Non-invasive CT clamp monitoring for V, A, W, kWh and power factor across single or three-phase systems.
Remote Switches
Single-channel relay control for pumps, motors, and machinery - trigger manually, on a schedule, or via sensor events.
RPM Indicators
Non-invasive rotational speed monitoring for motors, fans, conveyors and turbines - stall alerts included.
Not on the list?
Custom Device
We build the hardware and software. Our device plugs into your existing equipment and connects it to the cloud.
Why GreyLink
- LoRa Optional
- Add long-range, low-power mesh radio when your deployment needs it.
- Legacy Hardware
- Retrofit existing equipment with advanced IOT without replacing your assets.
- Custom 1-of-1
- Each device is purpose-built for your exact use case, not a generic shelf unit.
- Transparent Pricing
- Hardware from R450+ once-off, then R50+/month per device - data, connectivity, and cloud storage all included.
- 5-Year Warranty
- Every device ships with a 5-year hassle-free warranty under standard use. Upgrade to Warranty Unlimited for lifetime coverage.
Software Framework
GreyLink
Superluminal
Build your own custom IOT devices - fast. Superluminal is a firmware and integration framework designed for industrial and agricultural engineers who need reliable devices with optional LoRa connectivity without starting from scratch.
- LoRa & LoRaWAN protocol support built-in
- Modular sensor and actuator abstraction layer
- OTA firmware updates over-the-air
- Pre-built integrations: MQTT, Node-RED, Grafana
- Designed for low-power & harsh environments
superluminal_node.cBeta
1#include "superluminal.h"23// Define your device4static sl_node_t node;56int main(void) {7sl_node_init(&node, "BH-Monitor-01");8sl_set_network(&node, LORA_915);9sl_add_sensor(&node, BOREHOLE_LEVEL, A0);10sl_add_sensor(&node, PUMP_STATUS, D3);11sl_set_report_interval(&node, 60); // seconds12sl_begin(&node);1314for (;;) {15sl_tick(&node); // handles LoRa, OTA,16// sleep, and telemetry17}18}
v1.0 · LoRaWAN 1.0.3 · ESP32 / AVR
Pricing
One transparent price covers everything.
Hardware, mobile data connectivity, cloud data storage, and ongoing support. No surprise bills, no contract lock-in.
- Single Device
- R450+once-off
- Hardware, setup & configuration included
- Monthly Per Device
- R50+/ month
- Data, connectivity & cloud storage included
- Superluminal SDK
- Contact Us
- Framework licence for in-house builds
Peace of Mind
Warranty That Means It
Every GreyLink device ships with a comprehensive hardware warranty. And because every device is custom-built for your specific application, you define what normal operating conditions look like - not us.
Standard
5Year
Warranty
All GreyLink devices are covered for 5 years under standard use. Because your device is built for your exact application, you agree with us upfront what normal operating conditions are - so the warranty is always fair and clear.
- You define normal operating conditions at commissioning
- Repair or full replacement at no charge
- Applies to every production GreyLink device, no exclusions
Premium
Warranty Unlimited
The ultimate peace of mind. Your GreyLink device is covered forever, under the operating conditions you specify. Even many years down the line - your device will be replaced. No expiry. No fine print.
- You define the operating conditions - we honour them for life
- No time limit - ever
You write the rules.
Every GreyLink device is custom-built for your specific application - whether that's a pump running 18 hours a day, a sensor in a -20 °C cold room, or a meter strapped to a high-vibration motor. At commissioning, we document your exact operating conditions together. Those agreed conditions become your warranty baseline, so there's never ambiguity about what's covered.
Full warranty termsPeople
Meet the Team
The university-student team behind GreyLink IOT, bootstrapping practical solutions for real-world operations.
J. Prince
Electronic Diagnostic and Repair
M. Shepstone
Founder & Lead Engineer
Made in South Africa
Proudly South African
From concept to deployment, every part of the GreyLink IOT journey happens right here in South Africa - designed, built, and supported by local hands.
01
Local Development Team
Our engineers, developers, and support staff are all based in South Africa - providing fast, knowledgeable, and timezone-friendly assistance.
02
Designed in South Africa
Every hardware design and firmware architecture is conceived and refined locally - built for South African conditions, power realities, and environments.
03
Assembled in South Africa
Devices are assembled right here in RSA, supporting local industry and ensuring strict quality control from the first component to the final inspection.