Arduino based Automatic Plant Irrigation System with Message Alert

Arduino based Automatic Plant Irrigation System

Whenever we go out of town for few days, we always used to worry about our plants as they need water on regular basis. So here we are making Automatic Plant Irrigation System using Arduino, which automatically provides water to your plants and keep you updated by sending message to your cell phone.

In This Plant Watering System, Soil Moisture Sensor checks the moisture level in the soil and if moisture level is low then Arduino switches On a water pump to provide water to the plant. Water pump gets automatically off when system finds enough moisture in the soil. Whenever system switched On or off the pump, a message is sent to the user via GSM module, updating the status of water pump and soil moisture. This system is very useful in Farms, gardens, home etc. This system is completely automated and there is no need for any human intervention.Arduino based Automatic Plant Irrigation System

Required Components:

  • Arduino Uno
  • GSM Module
  • Transistor BC547 (2)
  • Connecting wires
  • 16×2 LCD (optional)
  • Power supply 12v 1A
  • Relay 12v
  • Water cooler pump
  • Soil Moisture Sensor
  • Resistors (1k, 10k)
  • Variable Resister (10k, 100k)
  • Terminal connector
  • Voltage Regulator IC LM317

GSM Module:

Here we have used TTL SIM800 GSM module. The SIM800 is a complete Quad-band GSM/GPRS Module which can be embedded easily by customer or hobbyist. SIM900 GSM Module provides an industry-standard interface; the SIM800 delivers GSM/GPRS 850/900/1800/1900MHz performance for voice, SMS, Data with low power consumption. The design of this SIM800 GSM Module is slim and compact. It is easily available in the market or online from eBay.SIM800L GSM module power supply circuit

  • Quad – band GSM/GPRS module in small size.
  • GPRS Enabled
  • TTL Output

Circuit Explanation:

In this Plant Irrigation System, we have used a Homemade Soil Moisture Sensor Probe to sense the soil moisture level. To make probe, we have cut and etched a Copper clad Board according to the Picture shown below. One side of the probe is directly connected to Vcc and other probe terminal goes to the base of BC547 transistor. A potentiometer is connected to the base of the transistor to adjust the sensitivity of the sensor.

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