View source for Premiers Pas avec Raspberry Pi et Arduino

[[Image:rpi+arduino.jpg|200px|thumb|right|Collecte de mesures avec un Arduino  Raspberry Pi]]



Interfacer le [[Raspberry Pi]] et une carte [[Arduino]] peut être utile pour de nombreux projets ([[PM2M]], [[RobAIR|Robotique]], ...).



* Via USB : http://blog.oscarliang.net/connect-raspberry-pi-and-arduino-usb-cable/
* Via GPIO : http://blog.oscarliang.net/raspberry-pi-and-arduino-connected-serial-gpio/

Read http://playground.arduino.cc/Interfacing/Python

Install pySerial
<pre>
sudo apt-get install python-serial
</pre>

Check the Arduino tty port
<pre>
ls /dev/tty*
</pre>


Download the following sketch on the Arduino board (using the Arduino IDE)
<pre>
void setup() {
  Serial.begin(9600);
}

void loop() {
  int sensorValue = analogRead(A0);
  Serial.println(sensorValue);
  delay(1000);
}
</pre>


Run the following python script
<pre>
import serial
ser = serial.Serial('/dev/ttyACM0', 9600)
while True :
    print ser.readline()
</pre>


More test

Download the following sketch on the Arduino board (using the Arduino IDE)
<pre>
// from http://blog.oscarliang.net/connect-raspberry-pi-and-arduino-usb-cable/
const int ledPin = 13;
	 
void setup(){
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
}
void loop(){
  if (Serial.available())  {
     light(Serial.read() - '0');
  }
  delay(500);
}
	 
void light(int n){
  for (int i = 0; i < n; i++)  {
    digitalWrite(ledPin, HIGH);
    delay(100);
    digitalWrite(ledPin, LOW);
   delay(100);
  }
}
</pre>


Run the following python script
<pre>
import serial
ser = serial.Serial('/dev/ttyACM0', 9600)
ser.write('10')
</pre>

More with [[Firmata]] : https://github.com/lupeke/python-firmata/

Download the firmata sketch on the Arduino board (using the Arduino IDE > Examples > Firmata > StandardFirmata)


Run the following python script
<pre>
from firmata import *

a = Arduino('/dev/ttyACM0')
a.pin_mode(13, firmata.OUTPUT)
a.delay(2)

while True:
    a.digital_write(13, firmata.HIGH)
    a.delay(2)
    a.digital_write(13, firmata.LOW)
    a.delay(2)
</pre>