UART: Universal Asynchronous Receiver Transmitter.

Communication is asynchronous, meaning it does not depend on a synchronized clock signal between the two devices. You can set the data transfer speed and format as needed — you basically set an agreed-upon timing between the two devices.

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A link to the wireless presentation is on Slack, but I’ll post it here, as well. The homework assignment is the last slide in the deck.

https://docs.google.com/presentation/d/1YiEodRM9PhPs4DZVSUEFF6OZIR1qBG2472OeiLW_kGM/edit?usp=sharing

HOMEWORK:

Choose one of the wireless topics covered in class and put it to practice for use in everyday life. For example, use the IR sensor with a remote control to make a fan for a hot summer day.

Document your project in action and post to the class blog, including the list of materials used, a circuit schematic, and notes regarding wins and challenges.

This is my synthesis about protocols.

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• Goal of the project and/or desired interaction

Create a circuit that activates an LED just when both photocell is covered and ultrasonic sensor has something close enough.

• Quick description of assembly and list of core components

1x Arduino

1 x medium breadboard.

1 x red LED

1x ultrasonic sensor

1 x photocell

1x resistors (220 ohms) – resistor

1 x resistors ( 10K ohms) – photocell

Jump wires

• How it works

By default the light is off (LOW). When the photocell is covered OR the ultrasonic detects an object the LED stays the same. Just when both are covered triggers the system to light up the LED.

• Any problems you encountered and/or solved

I had to think through my if statements before coding.

Images of your circuit 

https://github.com/Lywa/carla_molins_Pcomp/tree/master/WEEK_5_hw Continue reading →

The goal of the project was to create a locker that green LED opened when the right color code was pressed. The red LED opened while the code remains wrong.

Components

1x Arduino

1 x breadboard.

1x green LED

1 x red LED

3 x buttons

2 x resistors (220 ohms) – resistors

4 x resistors ( 10K ohms) – buttons

Jumper Wires

How it works:

If it is in the right sequence, green LED will open
Press the button sequentially once a time with no repeat
Green led means unlocked (right), red led means locked (wrong)

Code:

const int blue = 3;
const int red = 4;
const int yellow = 2;
int ledRed = 13;
int ledGreen = 9;

int lastRed = LOW;
int lastBlue = LOW;
int lastYellow = LOW;

int i = 0;

void setup() {
// put your setup code here, to run once:
pinMode(blue, OUTPUT);
pinMode(red, OUTPUT);
pinMode(yellow, OUTPUT);
}

void loop() {
int redState = digitalRead(red);
int blueState = digitalRead(blue);
int yellowState = digitalRead(yellow);

if (redState == LOW && lastRed == HIGH) {
if (i == 2) {
i = 0;
} else {
i = i + 1;
}
}

if (blueState == LOW && lastBlue == HIGH) {
if (i == 2) {
i = 3;
} else {
i = 0;
}
}
if (yellowState == LOW && lastYellow == HIGH) {
if (i == 3) {
i = 4;
} else {
i = 0;
}
}

if (i == 5) {
digitalWrite(ledRed, LOW);
digitalWrite(ledGreen, HIGH);
}
else {
digitalWrite(ledRed, HIGH);
digitalWrite(ledGreen, LOW);
}

lastRed = redState;
lastBlue = blueState;
lastYellow = yellowState;
}