As a crucial device for modern agriculture and environmental monitoring, the LoRaWAN solar-powered soil sensor requires special attention to the maintenance of key components such as the solar power supply system, soil probes, and data transmission modules. Below is a professional maintenance guide for this type of sensor:

1、 Key points of daily maintenance

      Sensor position check

• Check the depth and Angle of the sensor inserted into the soil monthly to ensure good contact with the soil
• Check whether the fixing device is firm to prevent displacement caused by wind, rain or animal activity
• Ensure that there is no large plant root system around the sensor to avoid interference with the measurement

      Surface cleaning and maintenance

• Use a soft brush to regularly remove dirt and debris from the sensor surface
• For stubborn stains, use a soft cloth lightly and avoid using chemical cleaners
• Pay special attention to the surface of the cleaning sensor in contact with the soil

       Solar panel maintenance

• Check the surface of the solar panels every quarter to remove dust, bird droppings and other obstructions
• Increase cleaning frequency to ensure charging efficiency before winter or rainy season
• Check whether the solar panel bracket is stable to avoid angle deviation caused by strong wind

• Check the battery health once every six months by measuring voltage and current output
• Replacement should be considered when the battery capacity is less than 70% of the initial capacity
• In extreme temperature environment, take insulation or heat dissipation measures to protect the battery

3. Professional maintenance of soil probes

     Probe cleaning method

• The probe is removed from the soil every quarter and wiped clean with a soft cloth
• Increase cleaning frequency for saline-alkali land or areas where fertilizer is used frequently
• Use a special probe cleaner to treat stubborn stains and avoid using metal tools to scrape

     Probe calibration check

• Probe calibration should be performed at least once a year to ensure measurement accuracy
• Use a standard solution to check the response curve of the conductivity probe
• The temperature probe should be compared with the standard thermometer regularly

     Radio system inspection

• Check monthly whether the antenna connection is firm, no loosening or oxidation
• Ensure that there is no metal object around the antenna to block the signal transmission
• In areas prone to thunderstorms, check whether the lightning protection measures are perfect

     Network connection testing

• Regularly check the connection quality between devices and gateways
• Record the trend of signal strength (RSSI) and signal-to-noise ratio (SNR) changes
• When communication abnormalities are detected, check the device ID and network settings

    Special maintenance during rainy season

• Check if all seals and waterproof measures are intact
• Ensure unobstructed drainage holes to prevent water accumulation
• Check whether the equipment works normally after rainstorm

6、 Professional maintenance tools and spare parts

    Recommended maintenance toolkit

• Digital multimeter (used to detect voltage and current)
• Insulated screwdriver set
• Anti static cleaning brush
• Probe calibration toolkit

• Same model battery (recommended to keep 1-2 spare)
• Sealing ring and waterproof tape
• Backup probes (quantity determined by usage environment)
• Solar panel cleaning kit