Zigbee soil moisture sensor is a wireless, solar-powered device used to monitor soil moisture, temperature, and EC (electrical conductivity) in real time for gardens, greenhouses, and smart irrigation. It communicates through the Zigbee protocol, allowing low-power, long-range data transmission to gateways, smart home hubs, or IoT platforms. Common applications include automatic watering systems, greenhouse monitoring, and precision farming. Keep your plants healthy with the ATO Zigbee soil moisture sensor.
Technical Specifications
| Specification |
Details |
| Model |
ATO-NAS-STH02B |
| Communication Protocol |
Zigbee/WiFi (optional) |
| Operating Frequency |
2.4 GHz |
| Maximum Wireless Range |
45 m (line-of-sight, unobstructed) |
| Bluetooth Version |
Bluetooth 5.0 |
| Measurement Interval |
5 min (user-configurable) |
| Ingress Protection Rating |
IP66 |
| Power Supply |
AA (1.2 V)×3 battery |
| Operating Temperature |
-10–60°C (14–140°F) |
| Operating Moisture |
0–100% RH (non-condensing) |
| Temperature |
Measurement Accuracy |
±0.5°C (user-configurable) |
| Measurement Range |
-10–60°C |
| Moisture |
Measurement Accuracy |
±1% RH (user-configurable) |
| Measurement Range |
0–100% RH (non-condensing) |
| Dimensions |
86×86×146 mm |
| Weight |
260 g |
| Certification |
CE |
| Warranty |
12 months |
Features & Benefits
- Solar Powered & Rechargeable: Equipped with high-efficiency solar panels and a NiMH rechargeable battery, the Zigbee soil moisture sensor provides continuous and reliable soil monitoring while minimizing maintenance and energy consumption.
- Home & Smart Garden Integration: Ideal for backyard gardens, or greenhouse environments, supporting seamless integration with Zigbee-enabled soil moisture systems for smart home automation.
- Accurate Soil Temperature & Moisture: High-precision ±0.5°C and ±1% RH measurements enable precise monitoring of plant root conditions, preventing overwatering or drought stress.
- EC Soil Quality Measurement: The ATO-NAS-STH02B soil sensor measures soil electrical conductivity up to 20 mS/cm, enabling precise fertilization optimization and maintaining healthy soil conditions.
- Smart App Control & Automation: Compatible with iOS and Android apps for remote monitoring, real-time push notifications, and automated smart irrigation scene linkage.
- Easy Installation: Compact, lightweight, and IP66-rated waterproof design ensures reliable performance in outdoor or greenhouse environments, with straightforward setup for any user.
Detail

Installation: Battery Repalcement

- Take out the waterproof rubber plug from the battery compartment.
- Use a screwdriver to remove the screws.
- Remove the cover and battery compartment, then replace the batteries.
- Reinstall the battery compartment, replace the cover, and tighten the screws.
Typical Applications
- Home Gardening Soil Sensor: Monitor soil moisture, temperature, and EC with the smart soil sensor for healthy indoor plants and small gardens.
- Backyard & Urban Garden Soil Monitoring: Ensure lawns, vegetables, and ornamental plants thrive with smart irrigation.
- Greenhouse Soil Management: Track soil conditions for crops and seedlings with high-accuracy smart sensors.
- Smart Irrigation Systems: Integrate with sprinkler controllers or timers for automated watering and water savings.
- Agricultural Research & Trials: Collect precise soil moisture, temperature, and conductivity data for experiments using the Zigbee soil moisture sensor.
- Community & Educational Gardens: Share sensors and track soil conditions collaboratively for learning or group projects.
 Zigbee Soil Moisture Sensor for Home Garden |
 Zigbee Soil Moisture Sensor for Backyard Garden |
 Zigbee Soil Moisture Sensor for Community Garden |
Feature Comparison: Solar-Powered vs Battery-Powered
| Feature |
Solar-Powered Soil Sensor (ATO-NAS-STH02B) |
Battery-Powered Soil Sensor (ATO-NAS-STH01B)
|
| Power Source |
High-efficiency solar panels + NiMH rechargeable battery. Ideal for remote gardens, greenhouses, or outdoor monitoring where battery replacement is inconvenient. |
3 AA batteries. Suitable for short-term use or small gardens where easy battery access is available. |
| Maintenance |
Low maintenance; solar automatically recharges the battery. Perfect for long-term monitoring with minimal attention. |
Requires battery replacement or recharging. Good for temporary projects where regular battery maintenance is acceptable. |
| Outdoor / Remote Use |
IP66 waterproof, suitable for all-weather outdoor and remote locations. Can be installed unattended in hard-to-reach or remote areas. |
Limited by battery life; must be near battery access. Best for indoor or backyard locations where batteries can be changed easily. |
| Monitoring Duration |
Near-continuous runtime (solar + battery backup). Ensures long-term stable soil monitoring. |
Weeks to months depending on battery. Sufficient for short-term experiments or indoor plant care. |
| Installation Flexibility |
Can be installed anywhere, including hard-to-reach or remote locations. Great for flexible, outdoor setups. |
Backyard, or locations accessible for battery replacement. Better for locations where battery changes are convenient. |
| Cost |
Slightly higher upfront cost. Offset by long-term savings in maintenance and battery replacement. |
Lower upfront cost. Budget-friendly for short-term or indoor projects. |
| Environmental Impact |
Eco-friendly, solar-powered. Sustainable and energy-efficient choice. |
Uses disposable or rechargeable batteries. Acceptable for temporary or indoor use. |
FAQ
Q1: How can I manually measure soil data?
In addition to setting automatic detection in the APP, press the reset button on the wireless soil sensor. It will immediately detect the current soil temperature, moisture, and conductivity. Each measurement lasts about 3 seconds.
Q2: What soil moisture level indicates overwatering?
A moisture reading around 80% indicates the soil is too wet. Note that the ATO smart soil sensor cannot detect 100% soil moisture—0% represents air, and 100% represents water.
Q3: What should I pay attention to when using the Zigbee soil moisture sensor?
- Keep the metal probes clean before inserting into soil to ensure accurate readings.
- On dense lawns, remove surface grass to allow full contact with the soil.
- In flower beds, place the industrial soil sensor at least 10 cm away from the bed edges to avoid interference.
- Not suitable for small indoor pots or metal containers.
Q4: Is it normal for the data to fluctuate slightly?
Yes. Slight variations in soil temperature and moisture are normal. If readings remain unchanged for a long time, press the reset button for a new measurement.