Premiers Pas avec Raspberry Pi et Arduino

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Collecte de mesures avec un Arduino Raspberry Pi


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


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

Install pySerial

sudo apt-get install python-serial

Check the Arduino tty port

ls /dev/tty*


Download the following sketch on the Arduino board (using the Arduino IDE)

void setup() {
  Serial.begin(9600);
}

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


Run the following python script

import serial
ser = serial.Serial('/dev/ttyACM0', 9600)
while True :
    print ser.readline()


More test

Download the following sketch on the Arduino board (using the Arduino IDE)

// 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);
  }
}


Run the following python script

import serial
ser = serial.Serial('/dev/ttyACM0', 9600)
ser.write('10')

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

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)