Greenhouse temperature and humidity monitoring with IoT
A practical guide to monitoring greenhouse temperature and humidity with IoT sensors: choosing sensors, setting alert thresholds, and visualizing data in real time.
In greenhouse farming, temperature and humidity directly determine yield and crop quality. Manual monitoring is labor-intensive and easily misses critical moments. An IoT solution lets you track conditions in real time and alert instantly.
Why realtime monitoring?
- Crops are sensitive to swings: even a few hours out of range can cause harm.
- Early fault detection: broken fans, torn covers, irrigation failures.
- Data to optimize: understand the greenhouse microclimate over time.
What to measure
| Parameter | Why it matters |
|---|---|
| Air temperature | Affects photosynthesis and respiration |
| Air humidity | Linked to fungal disease and transpiration |
| Soil moisture | Drives the irrigation schedule |
| Light / CO₂ | Optimize growth (advanced) |
Basic system architecture
- Sensors placed at representative points in the greenhouse.
- Gateway collects data (over RS232/Modbus), stores it on-site and syncs to the server.
- Monitoring software shows KPIs, trend charts and sends threshold alerts.
Tip: place sensors at multiple heights and positions — the microclimate within a single greenhouse can vary significantly.
Setting sensible thresholds
- Define the safe range for each crop (e.g. tomatoes: 21–27°C during the day).
- Use color coding on the dashboard: green (OK), red (out of range) to read status in 3 seconds.
- Configure alerts to avoid “noise” from short fluctuations (use delay/dual thresholds).
Try it
You can see how realtime temperature/humidity data is visualized on Logtek’s demo dashboard — with KPIs, trend charts and color-coded gauges. The right hardware is the Logtek Gateway G1 paired with Logtek Monitor.
Conclusion
Monitoring greenhouse temperature and humidity with IoT helps you proactively protect crops and optimize yield. Start with the most important sensors, set sensible thresholds, and expand gradually. Contact Logtek for advice tailored to your setup.
Need a real-world IoT monitoring solution?
Watch the demo dashboard or contact Logtek for advice on your system.