Nutrition sub-system

This sub-system consists of motor, pH sensor and rainfall sensor. The rainfall sensor is activated by the Pi to sense the fall of rain. If rain is falling, the motor (Saranu et al. 2018) is running or not is checked by the Pi. If the motor is running, Pi will turn off the motor and it activates the pH sensor to sense the nutrition content in the soil. If the pH value is less than 7, acidic nature message is sent to the mobile. If the pH value is greater than 7, the alkaline message is sent. Otherwise, the neutral message is sent to the farmer/gardener’s mobile phone. Figure 12.6 shows the working principle of nutrition sub-system. The pH level and motor runtime output of the nutrition system is shown in Figure 12.7.