Week 4

Date: 10/8/20 - 14/8/20

Design Block Diagram and Flowchart

Objective:

• To design block diagram

• To design flowchart

Activity:

The paddy field management system consists of three parts, input, process and output. ESP8266 NodeMCU used as microcontroller system and as a server. Two nodeMCU microcontrollers used for this project as for nodeMCU 1 connect with pH sensor. Meanwhile, for nodeMCU 2, water level sensor and water temperature sensor are connected to it. Two options are given to supply power source for the microcontroller were, using power bank 15000 mAh or using LiPo and Li-ion Battery where the maximum voltage is around 4.2 V.

• Block diagram

• Flowchart

The flowchart indicates the process flow for the project implementation. This project focuses on the proposed project, which is monitoring the quality of water of the paddy field.

The system starts with all sensor, pH sensor, water level sensor and water temperature sensor take the reading of each parameter. Then, data from the sensors send to NodeMCU microcontroller. NodeMCU will find open network access to upload the data to the MySQL database. If the data cannot upload to database or disturbed, the process starts again where data been sent to NodeMCU.

After succeeding uploaded the data to MySQL, the data then sent to phpMyAdmin to store the data. Using Grafana dashboard, information is retrieved from the phpMyAdmin to present the data in an attractive form such as a graph. The process of the system will start again at evening as the network has been configured to take reading twice a day.