Introducing RS485 7-in-1 Soil Sensor Temperature, Moisture, Electrical Conductivity, pH and NPK Measurement. Measure multi-parameters of soil including Temperature, Moisture, pH, Nitrogen, Phosphorus, and Potassium. The output signal is RS485 and can be operated with a broad range of voltage from 5-30 V.

Measuring Ranges:

Specifications:

• Power supply: 5-30VDC
• Maximum power consumption: ≤0.15W
• Operating temperature: -40~80℃

NPK parameters:

• Range: 0-1999 mg/kg(mg/L)
• Resolution: 1 mg/kg(mg/L)
• Precision: ±2%FS
• Response time: ≤1S
• Protection grade: IP68
• Probe material: 316 stainless steels
• Sealing material: Black flame-retardant epoxy resin
• Default cable length: 2 meters, cable length can be customized
• Output signal: RS485
• Baud rate: 4800 or 9600

TRONIC.LK Recommendation: Buy a RS485 to USB module such as MD0547 or MD0552. Connect the module to PC, watch the video and try the software in the following links and read the values first. After that interface the module to Arduino UNO or ESP32 as you prefer. Note that, if you are working with ESP32, buy the 3.3V supported RS485 to TTL module, MD0158. The MD0053 module requires 5V to operate and it will burn the ESP32 if interfaced directly without level shifters. If you use a board such as Arduino UNO or Mega, you can use the MD0053 module.

1. Helpful Video:  Youtube
2. Download free Modbus software: QModMaster
3. Useful Download: PC software and Arduino example