Hydroponic agriculture uses nutrient solutions instead of soil for crop cultivation, enabling high yield, water efficiency, and controlled production. With the development of smart agriculture, real-time monitoring and precise management of hydroponic systems have become increasingly important. This article introduces the use of ARM Edge Controllers as the core platform for hydroponic system monitoring and control, enabling environmental data acquisition, intelligent control, and remote management to ensure healthy crop growth and improve production efficiency.
Traditional hydroponic agriculture mainly relies on manual inspection and adjustment of nutrient solutions and environmental parameters, which faces several challenges:
Large fluctuations in environmental parameters can affect crop growth;
Manual inspection is labor-intensive and inefficient;
Data is not recorded, making traceability and optimization difficult.
Using ARM Edge Controllers BL410 allows for:
Real-time monitoring of pH, EC, dissolved oxygen (DO), temperature, humidity, light intensity, etc.;
Automatic control of circulation pumps, fertilization pumps, aerators, LED lighting, and climate control devices;
Edge computing for fast data processing and local intelligent decision-making;
Remote management with cloud monitoring, alert notifications, and historical data analysis.
Sensor Layer: Environmental and water quality sensors (pH, EC, DO, temperature, humidity, PAR light, water level), on-site cameras.
Actuator Layer: Circulation pumps, aerators, fertilization pumps, solenoid valves, LED grow lights, fans, heating/cooling units.
Edge Control Layer: ARM Edge Controller as the core, responsible for data acquisition, real-time control, anomaly detection, and local alarms.
Communication Layer: Field buses (Modbus, RS485/RS232), Ethernet or wireless network to upload data to the cloud platform.
Cloud Platform & Operations Terminal: Remote monitoring, data analytics, alerts, and operational records.
| Indicator | Function | Recommended Sampling | Notes |
|---|---|---|---|
| pH | Acid-base balance control | 1–5 min | Optimal range 5.5–6.5 |
| EC / Nutrient solution concentration | Monitor nutrient levels | 1–10 min | Adjust per growth stage |
| Dissolved Oxygen (DO) | Water oxygenation | 1–5 min | Maintain ≥5 mg/L |
| Water Temperature | Regulate water temperature | 1 min | Affects root absorption efficiency |
| Light (PAR) | Control supplemental lighting | 5 min | Adjust with natural light |
| Water Level / Flow | Pump and circulation control | Real-time | Prevent pump dry-run or blockage |
pH Regulation: PID-based control of acid/alkali pumps to avoid overshoot and frequent operation.
Nutrient Solution Management: Adjust watering and fertilization based on EC and water level, optimized for crop growth stage.
Oxygen Management: Activate aerators and increase circulation when DO is below threshold.
Light & Temperature: Control LED lighting and climate according to crop growth stage and natural conditions.
Fail-Safe Strategy: In case of communication or cloud downtime, ARM controller executes local safety control.
Anomaly Detection: Detect sensor drift or environmental fluctuations using historical trends and thresholds.
Image Monitoring: Analyze leaf color, density, and early signs of disease using on-site cameras.
Data Analytics: Calculate daily water and nutrient consumption, energy use, and generate maintenance recommendations.
Tiered Alerts: Info, warning, critical levels sent via SMS, WeChat, or email.
Automated Actions: Exceeding critical thresholds triggers safety operations like backup pump activation or aeration.
Sensor Maintenance: Regular calibration of pH, EC, and DO sensors ensures accuracy.
Remote Operations: Support OTA updates, remote strategy adjustments, and historical data retrieval.
Requirement analysis and scenario planning;
Device selection and wiring;
Sensor calibration and integration;
Simulation and PID tuning;
On-site trial run (7–14 days) to observe data stability;
Acceptance and delivery of operational and maintenance manuals.
Increased crop yield and consistency;
Reduced labor and resource consumption;
Data traceability supports optimization and predictive modeling;
Expandable to multi-site management for industrial hydroponic agriculture.
ARM Edge Controller, with their low power consumption, industrial reliability, and rich interfaces, are ideal for smart monitoring and control of hydroponic agriculture. Combined with edge intelligence and cloud integration, they enable real-time, automated, and traceable production management, improving efficiency and reducing costs, while laying the foundation for future smart agriculture applications.
