Week 6 - Journal

Software tool:

Tinker cad online tool is pretty useful for designing the circuits where I can test the results easily, to avoid any mistakes before the actual test on the bred board.

Arduino IDE for Mac Os

coding and programming hardware components need an intermediate tool to adjust and to operate the code on the electronic circuits. Arduino IDE is doing this function.

Software design process

• open Tinker Cad on line tool and drag all needed components.

• Starting with ground wire from all components (2 US sensors, Fan, Buzzer, Temperature sensor and RGB LED).

• Unifying the ground by taking a black wire from all components and connect it with the board then from the board to the GND in Arduino Uno.

• connecting all +ve of both L35 and 2 ultrasonic sensors with 5V in Arduino.

• Temperature sensor needs to be connected on an analog connection (5A).

• 3 resistors 220 Ohm are connected to the RGB LED except the common cathode pin it is connected with the ground.

• Each Ultrasonic sensor has TRIG and ECHO pins which are connected with digital link.

• Finally 

• both +ves of buzzer and Fan are connected to digital link as well.

Software implementation process

Tinker cad coding 

• Open  blocks in tinker cad and starting to write the code.

• Picking an If then els condition from the control category.

• Drag (return true if one of the inputs at least is true). 

• I need to insert 3 inputs and any one of these inputs is true the out puts (Fan, buzzer and RGB) should work.

• Drag the block of reading ultrasonic sensors at distance less than 30 cm.

• Set the temperature sensor to work at temperature greater than 30 cm.

• Set the output by dragging Set pen High or low.

• Set pen 1,2,8,9 are high as they RGB, buzzer and fan

• Alternate the RGB pens to give a different light colors by setting pin 8,10 high while 8 is low.

• Finally, Set the else condition where if non of the previous inputs is true ==> Shut all system outputs.

Arduino IDE

• Compiling the system on tinker cad by clicking on simulation.

• After working the system properly, copying the code as a text from tinker cad.

• Open Arduino IDE and upload the code on it to start the actual first trial of the system.

Before void setup

• Set variable as long type to carry data from ultrasonic 

• long readUltrasonicDistance(int triggerPin, int echoPin)

• Identify each trigger and echo pens whether input or output 

• pinMode(triggerPin, OUTPUT);

• set echo pin input as it return data to the ultrasonic sensor.

• pinMode(echoPin, INPUT);

Void setup

Identify each component on each pin by using pinMode function

• pinMode(A5, INPUT); for LM 35 temperature sensor

•  pinMode(1, OUTPUT);  fro Buzzer

•  pinMode(2, OUTPUT);  fro Dc fan

•  pinMode(8, OUTPUT); for RGB

•  pinMode(9, OUTPUT); for RGB

•  pinMode(10, OUTPUT); for RGB

• 
  

void loop

The code starts by checking the distance that has been returned by the echo pin as the following

1- If the returned distance on both ultrasonic sensors is less than 30 cm the buzzer on pin 1 is alert and the the fan on pin 2 rotates.  and the RGB lights up

2- If the temperature that received by LM35 sensor is > 30 C also, buzzer, Dc fan and RGB are on. 

In /Out Differentiation

I surprised by myself that I could add more than one input and outputs in the same time and thinking in writing code easily, so I think this week is the backbone of my final project because now I know how to connect the moisture sensor and to code it such as any other sensor.