Intro to Arduino Akiba FreakLabs, Tokyo Hackerspace Traditional - - PowerPoint PPT Presentation

Intro to Arduino

Akiba FreakLabs, Tokyo Hackerspace

Traditional embedded

• What makes embedded development difficult?

– Build tools – Software internals – Non standard hardware

Arduino

• Why Arduino

– Cheap – Standardized hardware – Vast libraries – Easy to program devices – Very active community

Arduino IDE

Arduino Hardware

• Standardized
• Open source
• Many variants

Arduino Pins

Lab 1 – Hello World

• Serial.begin(speed)

– initializes serial port at given speed

• Serial.print(string)

– prints string

• Serial.println(string)

– prints string + trailing newline

Lab 2 – Blink

• pinMode(pin, dir)

– pin = pin number – dir = INPUT or OUTPUT

• digitalWrite(pin, val)

– pin = pin number – val = LOW or HIGH or 0 or 1

• analogWrite(pin, val)

– pin = pin number – val = 0 to 255 – uses PWM – only for certain pins

Lab 3 - Fade

• delay(time)

– blocking delay in msec – time = msec

• Hardware connection

– Red = 5V – Black = GND – White = control -> goes to pin 9

Lab 4 – Servo Motor

Lab 4 – Servo Motor

• Servo myservo

– Creates servo object – Object has actions that can be accessed

• myservo.attach

– specifies which pin servo is

• n
• myservo.write(pos)

– value btw 0 and 180 specifies servo position

Lab 5 – Temperature Sensor

• Hardware connections

– Vin = 5V – GND = GND – Vout to Analog 0

• img/code from adafruit

• analogRead(pin)

– returns analog value btw 0 & 1023 – if using 5V supply as ref, full scale (1023) corresponds to 5V – voltage conversion

(val / 1023) * 5V

Lab 5 – Temperature Sensor