Before Jupiter Electronics became a hardware studio working on scientific instruments and laser systems, we spent years solving a much messier problem: automating freshwater and reef aquariums. If you've ever run a reef tank, you know the drill - a doser for alkalinity, a separate doser for calcium, a pH controller, a temperature controller, a lighting timer, an ATO (auto top-off) for evaporation, maybe a CO2 regulator for planted tanks. Five or six different controllers, none of them talking to each other, each with its own quirks and failure modes.

That background is where OrcaTron comes from. When indoor growing became something people were doing at home and at commercial scale, we looked at the existing automation landscape and saw exactly the same mess we'd seen in aquariums ten years earlier. Five different devices. Five different apps. Zero data crossing between them.

The problem with "grow automation" in 2026

Walk into any indoor grower's tent or room and you'll usually find:

  • A CO2 controller (one vendor)
  • A humidity/temperature controller (different vendor)
  • A light timer (often just a mechanical plug)
  • A watering timer (another plug, another clock)
  • A pH/EC meter for the nutrient solution (manual, read by hand)
  • A moisture probe stuck in the soil (if the grower is lucky)

None of these devices know about each other. The CO2 controller doesn't care that the humidity is off. The watering timer doesn't know that the soil moisture is already at 60%. The light timer fires regardless of whether the canopy temperature is 35°C. Every decision is isolated, and the grower is the integration layer - in their head, every day, walking rounds.

That's the exact same failure mode we saw with aquariums. And just like aquariums, it leads to bad outcomes: overfeeding, overwatering, wrong VPD (vapour pressure deficit), wasted electricity, wasted nutrients, and sometimes crop loss.

What OrcaTron does

OrcaTron is one box. It monitors the full environment, calculates what should happen next, and actuates the hardware that needs to respond. Specifically:

Environmental sensing

  • CO2 - NDIR sensor, calibrated, with drift compensation
  • Temperature & humidity - multiple probes so you can measure canopy vs. ambient
  • Light (PAR & lux) - so you know what the plants actually receive, not what the light advertises
  • Soil moisture - capacitive probes that don't corrode over a season
  • Water pH and EC - for nutrient solution monitoring

Automation

  • Automatic watering based on real moisture data, not a clock
  • Fertilizer calculator - tells you what to mix and when, based on the growth stage and current readings
  • Climate logic - keeps VPD dialed in across the photoperiod
  • Light scheduling - with intensity curves, sunrise/sunset simulation
  • Alerts - when anything is out of range, before it becomes a problem

One box. One app. Real data.

The philosophy is simple: everything a grower needs, in one ecosystem, with real data instead of guesswork. Not five apps, not five controllers, not a wall of timers. One system that knows the full picture and makes decisions accordingly.

Under the hood, OrcaTron is built around an ESP32-based main controller with expansion modules for different sensor and actuator types. The firmware runs a real control loop - PID on temperature and humidity, rule-based logic for irrigation, smoothed averaging on noisy sensor lines. Data logs to the cloud and to a local dashboard. Growers can SSH into the control loop if they want to tune it (most don't, but the power users love it). This is the same kind of custom PCB and embedded design we do for scientific instruments, just applied to a different problem domain.

The best feedback we've had from commercial growers is "I stopped walking rounds every three hours." That's what success looks like to us - the grower gets their time back and the plants get better decisions.

Why we're doing this

Honestly? Because we got tired of watching people spend money on half-solutions. A commercial grower running four rooms can easily sink 8-12k EUR into disparate controllers that still don't give them integrated data. For a fraction of that cost, OrcaTron gives them everything, plus the data infrastructure to actually learn from their grows.

And we know this space. Aquariums taught us that automation is not just about "turning stuff on and off" - it's about closed-loop control with proper sensor hygiene, failure modes that don't kill the livestock, and UIs that a non-engineer can trust. Those same principles transfer directly to growing.

Where it's going

OrcaTron is already in use at multiple sites, from home growers to multi-room commercial operations. The roadmap includes better computer-vision-based plant health monitoring, automated nutrient dosing from stock solutions, and integration with commercial HVAC systems for bigger rooms.

If you're running a grow and tired of juggling controllers, take a look at orcatron.eu or get in touch - we'd love to talk about your setup.