Can you recommend a sensor gateway for monitoring CO2 and VPD in indoor grow rooms?

Yes — for indoor grow rooms, I’d recommend looking for a gateway that can accept multiple environmental sensors and export data via MQTT/Modbus/API, rather than a simple “single-sensor hub.”

Good gateway options

1) Acuity / SensorPush-style IoT gateways

• Good for: easy deployment, cloud dashboards, basic monitoring
• Pros: simple setup, solid wireless sensor ecosystem
• Cons: often less flexible for integration with automation systems

2) ThingsBoard-compatible gateway + industrial CO2/VPD sensors

• Good for: growers who want custom dashboards and alerts
• Pros: flexible, supports MQTT/HTTP, good for scaling
• Cons: a bit more technical to set up

3) Milesight LoRaWAN gateway + LoRa environmental sensors

• Good for: larger grow rooms or multi-room facilities
• Pros: long range, low power, supports multiple sensor nodes
• Cons: needs LoRaWAN sensors, so it’s a more complete ecosystem

4) Sensaphone / Monnit / Elsys industrial monitoring gateways

• Good for: reliability and alarm notifications
• Pros: strong alerting, commercial-grade
• Cons: sometimes costly and less open than DIY-friendly systems

What to prioritize

For CO2 and VPD, you’ll want:

• CO2 sensor: NDIR-based, ideally with calibration support
• Temp/RH sensor: accurate enough to compute VPD
• Gateway features:
  • MQTT or API support
  • local data logging
  • alerting for high/low CO2, temp, RH, VPD
  • multiple sensor support
  • Wi‑Fi/Ethernet or LoRaWAN depending on room size

Practical recommendation

If you want the best balance of industrial reliability + flexibility, I’d suggest:

• Small to medium grow room:
  A gateway with MQTT support + wired or wireless CO2/temp/RH sensors
• Larger facility / multiple rooms:
  LoRaWAN gateway with distributed sensors in each zone

If you want a direct pick

A very solid general-purpose choice is:

• Milesight UG65 / UG67 LoRaWAN gateway
  paired with:
• LoRaWAN CO2 + temp/RH sensors

That gives you a scalable setup for calculating VPD and monitoring CO2 across grow zones.

If you want, I can also recommend:

1. a budget option,
2. a professional/industrial option, or
3. a fully DIY/Home Assistant setup.