Description

System Composition and Core Equipment
A typical agricultural LoRa wireless irrigation system consists of the following components:
1. Perception Layer (Data Acquisition):
🔹LoRa Soil Moisture Sensor: Monitors volumetric water content, temperature, and electrical conductivity (EC value) at different soil depths (e.g., 10cm, 20cm, 40cm), serving as the core basis for precision irrigation.
🔹LoRa Weather Station: Monitors precipitation, temperature, humidity, wind speed, light intensity, and evaporation rates, providing environmental references for irrigation decisions.
🔹LoRa Liquid/Water Level Sensor: Monitors water levels in water sources (wells, ponds, reservoirs).
Control and Execution Layer (Irrigation Actions):
🔹LoRa Wireless Valve Controller: Receives platform commands to automatically or manually control field solenoid valves. Typically supports solar charging and battery power.
🔹LoRa Pump Controller: Remotely controls pump start/stop while monitoring current and voltage status for protection.

2. Network Transmission Layer (Data Link):
🔹LoRa Gateway: Deployed at elevated points in farmland (e.g., utility poles, rooftops), responsible for receiving data from all sensors and valve controllers. Transmits data to the cloud platform via 4G/Ethernet. A single gateway can cover hundreds to thousands of nodes.

3. Platform and Application Layer (Smart Brain):
🔹Cloud Platform/Monitoring Center: Data visualization, device management, and alarm center.

4. Smart Irrigation Strategies:
🔹Scheduled Irrigation: Irrigate at fixed times.
🔹Rotational Irrigation: Set start/stop times for different irrigation groups.
🔹On-Demand Irrigation: Automatically triggers irrigation based on upper/lower soil moisture thresholds.
🔹Mobile App/WeChat Mini Program: Farmers can view field data, manually control valves, and receive alerts anytime, anywhere.

System Workflow (Smart Closed-Loop)
🔹Data Collection: Sensors monitoring soil moisture, weather stations, etc., periodically transmit data via LoRa wireless to the gateway.
🔹Data Transmission: The gateway aggregates data via 4G networks and transmits it to the cloud platform.
🔹Intelligent Decision-Making: The cloud platform automatically generates irrigation commands based on predefined irrigation strategies (e.g., when soil moisture content in the top 20cm layer falls below 15%).
🔹Remote Execution: Instructions are dispatched via the gateway to designated LoRa valve controllers and pump controllers, automatically activating solenoid valves and pumps.
🔹Irrigation Termination: When termination conditions are met (e.g., scheduled duration elapsed or soil moisture reaches 20%), the platform automatically issues shutdown commands.
🔹Monitoring and Alarms: Users can monitor the entire process via mobile devices. The system provides real-time alerts for equipment malfunctions, pipe ruptures, and other anomalies.

Implementation Key Points and Advantages Summary
Implementation Key Points:
🔹Gateway Deployment Planning: Conduct a basic site survey to ensure gateway locations provide optimal coverage for all terminal devices.
🔹Sensor Placement: Follow the “Uniformity Principle” by deploying sensors on representative plots, avoiding installation at special locations like field edges or ditches.
🔹 Power Supply Solution: Valve controllers and gateways should utilize solar panels + batteries for power, ensuring long-term stable operation.
🔹 Flood and Lightning Protection: Outdoor equipment must meet IP67 protection standards and include proper lightning protection grounding.

Advantage Summary:
The LoRa wireless irrigation solution perfectly aligns with modern agriculture’s core demands for water conservation, energy efficiency, labor savings, and productivity enhancement through its unique advantages of “long-range, cost-effective, robust, and flexible.” It successfully upgrades traditional “human-experience-based” irrigation to “data-driven” smart irrigation, serving as a key technological pathway for advancing agricultural modernization and sustainable water resource development.