WEEK 4 (FYP 2)

TITLE : CHANGE COMPONENT

Activity :

Last week, i bought some component. This week the progress of making prototype is began. After several try and error, I decided to change and add some component. 

Content:

List of new component :

• Nodemcu 
• Relay 2 Channel

NODEMCU

Nodemcu is used in this project as a main brain for the system. It controls the whole process of the system. The Nodemcu is a platform to Internet of Things projects. It is an open source. The nodemcu is includes the firmware which is built-in WIFI EP8266 so it can be connected to internet network. The Nodemcu is provided with the sets of analog and digital input and output. It contains 14 digital ports and only 1 analog ports. The input power is connected to USB port by USB cable. The Nodemcu can be programmed by the computer software which is Arduino IDE (Integrated Development Environment) through a type-B USB cable.

RELAY 2 CHANNEL

A relay is an electrically operated switch that can be turned on or off, letting the current go through or not, and can be controlled with low voltages, like the 5V provided by the Arduino pins. Controlling a relay module with the Arduino is as simple as controlling any other output as we’ll see later on. This relay module has two channels (those blue cubes). There are other models with one, four and eight channels. This module should be powered with 5V, which is appropriate to use with an Arduino. There are other relay modules that are powered using 3.3V, which is ideal for ESP32, ESP8266, and other microcontroller

Conclusion:
The reason of changing the main component from Arduino to Nodemcu is the arduino is hard combine code with wifi module code. After done research and study new component which is nodemcu, it is more easy from the arduino because the nodemcu has built in wifi module (ESP8266) inside the component.