Week 22

 Addition of Sensor to NodeMCU ESP8266

I discovered that the NodeMCU ESP8266 is remarkable as it could support the two sensors before, therefore I decided to add two more sensor into the circuit and try to operate this project. I have discovered two important sensor that could works well in the agriculture field which are the pH sensor soil and ultrasonic sensor.

Ultrasonic sensor to monitor the water level in the drainage.

The ultrasonic sensor are apply to the field to act a water level detector. The ultrasonic sensor, is similar to bats, they uses SONAR to measure an object's distance. With high precision and reliable readings in convenient-to-use packages from 2 cm to 400 cm, it offers magnificent non-contact range acknowledgement. Daylight or dark matter does not hinder the process, whereas delicate materials such as fabric can be hard to acoustically recognize. A module for ultrasonic transmitters and receivers comes with it. The Trig pin must be set high for 1 millisecond to create the ultrasound. This produces an 8-cycle sound burst at the speed of sound, which is detected by the Echo pin. The Echo pin will output the time required the sound wave to traverse in microseconds.

pH sensor to keep track of the pH soil on field.

As for the pH sensor it is utilize to keep track of the pH soil on field. As farmers, the pH of soil is important as it would maintain the quality of crops. As for the paddy field, the most suitable value for soil for this rice plantation is at 6. The analogue pH sensor is intended to measure a solution's pH value and to indicate the substance's acidification or alkalinity. It is usually used in various applications, such as irrigation, wastewater treatment, programs, and environmental monitoring.