SERIAL COMMUNICATION. _creates a data stream by sending one bit at a me _occurs sequen ally H...E...L...L...O

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1 SERIAL COMMUNICATION Bits, Bytes, Data Rates and Protocols ASCI interpreta on Using terminal to view serial Data Serial Out from Arduino Serial In to Processing

2 SERIAL COMMUNICATION _creates a data stream by sending one bit at a me _occurs sequen ally H...E...L...L...O The first to be recieved is H then E and so on.

3 SERIAL COMMUNICATION_ARDUINO RX Receiving Data TX Transmi ng Data

4 Time to Talk with Arduino board! _Program to let Arduino say Hello World! _Baud Rate is the rate at which data is sent and recieve, must be synced between the two devices that are communica ng _Bit per second (baud rate) _Note that this communica on baud rate is independent of the upload process, which is fixed at bps.

5 Sending Serial Data Serial.println( something ); print and println is wri ng data to the serial port. println writes a \n(newline) at the end of each statement equivalant to a serial.write(); in other programming langauages

6 Interfacing with Processing

8 Arduino Board TX Processing Read

9 SERIAL PRINT_DATA OUT TO PROCESSING ARDUINO CODE: int val = 0; void setup() Serial.begin(9600); //initialize serial port at 9600 baud rat void loop() val = analogread(0); //read analog pin 0 and assign to val Serial.print(val); //send val to the serial port via Serial.print() Serial.println(); //send a new line (ascii) to serial port // wait 10 milliseconds before the next loop // for the analog-to-digital converter to settle // after the last reading: delay(10); PROCESSING CODE: EXAMPLES > LIBRARY> SERIAL> SIMPLE READ import processing.serial.*; Serial myport; // Create object from Serial class int val; // Data received from the serial port void setup() size(200, 200); // I know that the first port in the serial list on my mac // is always my FTDI adaptor, so I open Serial.list()[0]. // On Windows machines, this generally opens COM1. // Open whatever port is the one you re using. String portname = Serial.list()[0]; myport = new Serial(this, portname, 9600); void draw() if ( myport.available() > 0) // If data is available, val = myport.read(); // read it and store it in val background(255); // Set background to white val = map(val, 0, 1023, 0, 255); fill(val); //fill rectangle in relation to val from arduino rect(50, 50, 100, 100); //draw rectangle at 50,50 at 100x100 pixels

10 ARDUINO CODE: void setup() Serial.begin(9600); void loop() Serial.print(analogRead(0)); Serial.println(); SERIAL EVENT_DATA OUT TO PROCESSING PROCESSING CODE: import processing.serial.*; Serial myport; // Create object from Serial class String instring; // Data received from the serial port byte bytes; float val; int lf = 10; // ascii code for linefeed void setup() size(200, 200); String portname = Serial.list()[0]; myport = new Serial(this, portname, 9600); myport.clear(); myport.bufferuntil(lf); //buffer until linefeed (println) void draw() background(255); // Set background to white val = map(val, 0, 1023, 0, 255); fill(int(val)); //typecast float to int rect(50, 50, 100, 100); /*built in function within processing called when data is available which can be set with buffer() to only trigger after a certain number of data elements are read and can be set with bufferuntil() to only trigger after a specific character is read to be used with one of the Read() functions*/ void serialevent(serial p) instring = p.readstring(); print( received: +instring); val = float(instring); //typecast string type to float println( val);

11 SERIAL FLUSH Flushes the buffer of serial port, when sending or recieving any call to Serial method will return only data received a er all the most recent call to Serial.flush(): Serial.println( Hello! ); Serial.flush(); will pass Hello! \n to Serial buffer before doing anything else to the Serial buffer.

12 Firmata Library ARDUINO CODE: EXAMPLES > LIBRARY> FIRMATA>STANDARD FIRMATA PROCESSING CODE: import processing.serial.*; import cc.arduino.*; Arduino arduino; // Create Arduino object int val = 0; // Data received from the serial port int pin = 0; void setup() size(200, 200); //return list of arduino connected to computer println(arduino.list()); //initialize Arduino on com port as Arduino class object arduino = new Arduino(this, Arduino.list()[0], 57600); void draw() val = arduino.analogread(pin); background(255); // Set background to white val = map(val, 0, 1023, 0, 255); fill(val); rect(50, 50, 100, 100);

13 arduino print: 186 (int) serialevent_readstring() without myport.bufferun l(lf): received: (string) NaN(not a number) = null/linefeed received: (float) received: received: received: NaN received: with myport.bufferun l(lf): received: 186 (string) (float) received: received: void serialevent(serial p) myport.bufferuntil(lf); instring = p.readstring(); print( received: +instring); val = float(instring); println( val);

14 Arduino Board RX

15 int ad=8; //digital output int cd=7; //digital output int incom; //incoming bytes void setup() Serial.begin(9600); //baud rate pinmode(ad,output); pinmode(cd,output); void loop() if(serial.available()) //if there is incoming bytes incom=serial.read(); switch(incom) case a : //if a is pressed digitalwrite(ad,high); digitalwrite(cd,low); //ad on, cd off break; case r : //if r is pressed digitalwrite(ad,low); digitalwrite(cd,high); //ad off, cd on break; case b : //if b is pressed digitalwrite(ad,low); digitalwrite(cd,low); break; default: Serial.println( Please key in command ); break; SERIAL READ_DATA INTO ARDUINO

PureData(PD) Max/MSP max v2; #N vpatcher 10 59 610 459; #P user uslider 286 66 18 128 255 1 0 0; #P window setfont Sans Serif 9.

comment 316 148 100 196617 Slide the fader to dim the LED; #P comment 69 192 125 196617 Click here to get a list of serial ports; #P

16 PureData(PD) Max/MSP max v2; #N vpatcher ; #P user uslider ; #P window setfont Sans Serif 9.; #P window linecount 1; #P message print; #P newex serial a 9600; #P window linecount 2; #P comment Slide the fader to dim the LED; #P comment Click here to get a list of serial ports; #P fasten ; #P fasten ; #P pop; FLASH LIBRARIES: h p:// ware

Arduino. AS220 Workshop. Part III Multimedia Applications Lutz Hamel

Arduino. AS220 Workshop. Part III Multimedia Applications Lutz Hamel AS220 Workshop Part III Multimedia Applications Lutz Hamel hamel@cs.uri.edu www.cs.uri.edu/~hamel/as220 Basic Building Blocks The basic building blocks for Arduino interactive object(s) are: Digital Input