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IoT Sensor Installation & Troubleshooting
Training
Install, configure, and troubleshoot temperature, humidity, pH, NPK, EC sensors, plus LoRaWAN and WiFi connectivity.
Objectives
This course is designed to create "IoT Technicians and Agricultural System Engineers" with a focus on hands-on practice. From selecting sensors suitable for the environment, wiring and configuring communication, deploying wireless networks (Wi-Fi and LoRaWAN), to troubleshooting techniques and calibration to ensure the system operates stably and durably.
Course Modules
01
Module 1: Agri-Sensors Deep Dive
- Climate Sensors: Working principles of temperature and humidity sensors, heat accumulation warnings, and Radiation Shield usage
- Soil & Water Sensors: Capacitive vs. Resistive soil moisture sensors
- EC and pH sensors for water and soil monitoring
- NPK Sensor: Reading principles and real-world usage limitations
02
Module 2: Wiring & Communication Protocols
- Analog (0-5V, 4-20mA) vs. Digital (I2C) signal differences and usage
- Deep dive into RS485 / Modbus RTU: the industrial standard for pH, EC, and NPK sensors
- Configuring Baud Rate, Parity, and Slave ID / Modbus Address
- Wiring best practices to avoid noise and resolving Ground Loop issues
03
Module 3: Wi-Fi & LoRaWAN Connectivity
- Wi-Fi 2.4GHz: SSID, Password configuration, and range limitations on farms
- LoRaWAN Technology: Long-range, low-power solution for wide areas
- LoRaWAN Architecture (End Node, Gateway, Network Server)
- Configuring Frequency Band correctly for Thailand (AS923)
- Device Registration (OTAA vs. ABP) and pairing Node with Gateway
04
Module 4: Field Installation Best Practices
- Representational Placement: choosing sensor positions that reflect real conditions
- Water and dust protection standards (IP65, IP67, IP68) and Junction Box with Cable Gland techniques
- Power Management: Battery calculation and small Solar Panel installation for standalone sensor nodes
05
Module 5: Troubleshooting & Maintenance
- Sensor Troubleshooting: causes of 0, negative, or abnormally fluctuating readings
- Using Multimeter and USB to RS485 converter to check sensor signals directly from a computer
- Network Troubleshooting: checking offline nodes, LoRaWAN signal obstruction issues, and RSSI / SNR checking techniques
- Calibration & Maintenance: cleaning EC/pH probe heads and calibrating with standard Buffer Solution to maintain accuracy