Industrial and agricultural IOT that works anywhere.

Devices with optional LoRa for remote farms, mine sites and legacy equipment.

Sensor datapoints
…
Tracked parameters
…

Real readings. Real devices. Right now.Connecting to the platform

From the sensor to your screen

One device, the link your site needs, and a platform that keeps every reading.

4G, Wi-FiLoRa, Radio10 km+ LOSSensorslevel, flow, temp,kWh, RPMGreyLinkdevicesolar, mainsor batteryBase stationone covers everydevice on siteGreyLinkplatformstored, charted,alertedYoudashboard, SMSLoRa, Radio10 km+ LOS4G,Wi-FiSensorslevel, flow, temp, kWh, RPMGreyLink devicesolar, mains or batteryBase stationone per siteGreyLink platformstored, charted, alertedYoudashboard, SMS
Each square is a real batch of readings reaching the platform.Waiting for the next batch

Custom 1-of-1

Each device is purpose-built for your exact use case, not a generic shelf unit.

Battery life on sensors
2 yr

Legacy hardware

Retrofit existing equipment with advanced IOT without replacing your assets.

LoRa optional

Add long-range, low-power mesh radio when your deployment needs it.

LoRa range, direct line of sight
10 km+

Cloud dashboard and alerting

Instant breach alerts via SMS or the dashboard, and historical trends for every device.

Historical uptime
99.99 %

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
#include "superluminal.h"
// Define your device
static sl_node_t node;
int main(void) {
sl_node_init(&node, "BH-Monitor-01");
sl_set_network(&node, LORA_915);
sl_add_sensor(&node, BOREHOLE_LEVEL, A0);
sl_add_sensor(&node, PUMP_STATUS, D3);
sl_set_report_interval(&node, 60); // seconds
sl_begin(&node);
for (;;) {
sl_tick(&node); // handles LoRa, OTA,
// sleep, and telemetry
}
}
Version
v1.0
Network
LoRaWAN 1.0.3
Targets
ESP32, AVR

One transparent price covers everything

Hardware, mobile data connectivity, cloud data storage, and ongoing support. No surprise bills, no contract lock-in.

ItemFromWhat it covers
Single DeviceR450+ once-offHardware, setup & configuration included
Monthly Per DeviceR50+ / monthData, connectivity & cloud storage included
Superluminal SDKContact usFramework licence for in-house builds

Warranty that means it

Every device is custom-built for your application, so you define what normal operating conditions look like, not us.

5years

Standard warranty

All GreyLink devices are covered for 5 years under standard use. 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
forever

Warranty Unlimited

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, and they become your warranty baseline.

Full warranty terms

Proudly South African

From concept to deployment, every part of the GreyLink IOT journey happens right here in South Africa.

  • C. Portwig portrait

    C. Portwig

    Software Engineer

  • J. Prince portrait

    J. Prince

    Electronic Diagnostic and Repair

  • M. Shepstone portrait

    M. Shepstone

    Founder & Lead Engineer

The university-student team behind GreyLink IOT, bootstrapping practical solutions for real-world operations.

Local development team

Our engineers, developers, and support staff are all based in South Africa, providing fast, knowledgeable, and timezone-friendly assistance.

Designed in South Africa

Every hardware design and firmware architecture is conceived and refined locally, built for South African conditions, power realities, and environments.

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.