Available now — 2 week lead time

Fan Controller

Intelligent 0-10V fan control with onboard PID algorithms and a Swiss-made Sensirion sensor. Set your target — temperature, humidity, or VPD — and walk away.

Runs fully independent once configured. No internet required. No cloud dependency. As long as it has power, it controls your fans.

Encrypted SMS and telephone voice alerts when parameters exceed your thresholds.

$200 headless
$400 with touchscreen
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Set It and Forget It

This isn't a dumb relay that turns fans on and off. It's a complete climate control system with its own processor running PID control algorithms — the same mathematics used in industrial process control, HVAC systems, and scientific equipment.

Configure your target setpoint — temperature, humidity, or VPD — and the controller continuously adjusts fan speed to maintain it. Not hunting. Not overshooting. Smooth, proportional control that converges on your target and holds it there.

Once configured, the controller runs entirely on its own CPU. Lose your internet connection. Lose your phone. The controller doesn't care. As long as it has power, it controls your fans.

Control Modes

  • Temperature

    Set a target temperature and the controller modulates fan speed to maintain it — faster when too hot, slower when at setpoint

  • Humidity

    Target a specific RH percentage — the controller increases ventilation to remove moisture or reduces it to retain humidity

  • VPD (Vapor Pressure Deficit)

    The gold standard for plant transpiration. Controller calculates VPD from temp and humidity, then maintains your target deficit

  • Cut-offs & Limits

    Set hard boundaries — minimum and maximum fan speeds, emergency thresholds, and fail-safe behaviors

Technical Specifications

DAC
12-bit digital-to-analog converter

4,096 discrete speed levels — smooth, precise control without stepping or hunting

OUT
0-10V signal output

Industry-standard control voltage for EC fans and variable speed drives

MEM
EEPROM + Flash Memory

DAC calibration stored in dedicated EEPROM. All settings and state retained in high-quality, long-life flash memory on the microcontroller.

PWR
5V USB power

Standard USB power — any phone charger works as a replacement

12-Bit Precision

The quality of your fan control is only as good as the signal driving it. We use an off-board 12-bit DAC — a dedicated digital-to-analog converter that outputs a clean, precise 0-10V signal.

12-bit resolution gives you 4,096 discrete fan speed levels. That's enough granularity for the PID algorithm to make tiny adjustments without visible stepping — your fans ramp smoothly up and down as conditions change.

DAC calibration is stored in dedicated EEPROM, while all settings and operational state live in high-quality flash memory on the microcontroller — non-volatile storage that survives power loss indefinitely. Lose power, regain power, and the controller resumes exactly where it left off. No reconfiguration required.

Included Sensirion Sensor

Every fan controller ships with a Swiss-made Sensirion temperature and humidity sensor. Deploy it however suits your setup.

Onboard
Keep it attached
Leave the sensor mounted on the controller itself. Simple. The controller reads the environment right where it sits.
Wired
Run a cable
Mount the sensor elsewhere in the room — at canopy height, near the exhaust, wherever matters most — and connect it by wire.
Wireless
Deploy anywhere
Use the sensor wirelessly for maximum flexibility. Place it exactly where you need environmental readings — the controller receives data over the network.

Swiss Precision

Sensirion sensors are the industry standard for precision environmental measurement — designed and manufactured in Switzerland, trusted in medical devices, cleanrooms, and laboratory equipment. Accurate readings mean accurate control.

Continuous Data Logging

The controller reports its state every five seconds — current fan speed, temperature, humidity, VPD, and setpoint status. All of it logged automatically as historical graphical data.

The server retains one month of aggregated data — enough to see trends, spot problems, and verify that your climate control is actually working as expected.

Want longer records? Our app can take daily snapshots of real-time data, building up months, years, or even decades of environmental history. Track seasonal patterns. Compare runs. Build institutional knowledge about your grow.

What Gets Logged

Reporting interval Every 5 seconds
Real-time data retention 48 hours
Aggregated data retention 1 month
App snapshot archives Unlimited

No subscription required. Historical data included free with every device.

Hardware & Connectivity

Processing & Wireless

  • Powerful microcontroller running PID algorithms, cut-off logic, and proprietary control code — all computed locally
  • Robust WiFi for remote monitoring and adjustment — but not required for operation
  • Bluetooth Low Energy for local configuration without network access
  • Over-the-air firmware updates — algorithm improvements pushed automatically when connected
  • Dark room aware — indicator lights automatically dim when sensors detect lights-off, protecting your dark cycle

Access From Anywhere

  • TLS-encrypted connection to our servers — monitor and adjust from any phone, tablet, or computer, anywhere in the world
  • Local-first when you're home — on the same network, the device responds directly without round-tripping through the internet
  • SMS and phone call alerts — get notified immediately if temperature, humidity, or VPD goes out of range
  • Web app works on any browser. Native Android and iOS apps available.
  • No subscriptions. No monthly fees. One purchase, lifetime access.

Optional Touchscreen

The display model includes a capacitive touchscreen showing real-time readings, current fan speed, and setpoint status. Adjust targets, view graphs, and monitor your climate at a glance.

Or skip the screen entirely and use our web interface or mobile app. The headless unit is functionally identical — the display is purely a convenience for on-site interaction.

Headless $200
With touchscreen $400

Ready for intelligent climate control?

All configurations available with 2 week lead time. Shipping worldwide.