Arduino-Development / examples /04.Communication /SerialCallResponseASCII /SerialCallResponseASCII.ino
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9.33 kB
| /* | |
| Serial Call and Response in ASCII | |
| Language: Wiring/Arduino | |
| This program sends an ASCII A (byte of value 65) on startup and repeats that | |
| until it gets some data in. Then it waits for a byte in the serial port, and | |
| sends three ASCII-encoded, comma-separated sensor values, truncated by a | |
| linefeed and carriage return, whenever it gets a byte in. | |
| The circuit: | |
| - potentiometers attached to analog inputs 0 and 1 | |
| - pushbutton attached to digital I/O 2 | |
| created 26 Sep 2005 | |
| by Tom Igoe | |
| modified 24 Apr 2012 | |
| by Tom Igoe and Scott Fitzgerald | |
| Thanks to Greg Shakar and Scott Fitzgerald for the improvements | |
| This example code is in the public domain. | |
| https://www.arduino.cc/en/Tutorial/BuiltInExamples/SerialCallResponseASCII | |
| */ | |
| int firstSensor = 0; // first analog sensor | |
| int secondSensor = 0; // second analog sensor | |
| int thirdSensor = 0; // digital sensor | |
| int inByte = 0; // incoming serial byte | |
| void setup() { | |
| // start serial port at 9600 bps and wait for port to open: | |
| Serial.begin(9600); | |
| while (!Serial) { | |
| ; // wait for serial port to connect. Needed for native USB port only | |
| } | |
| pinMode(2, INPUT); // digital sensor is on digital pin 2 | |
| establishContact(); // send a byte to establish contact until receiver responds | |
| } | |
| void loop() { | |
| // if we get a valid byte, read analog ins: | |
| if (Serial.available() > 0) { | |
| // get incoming byte: | |
| inByte = Serial.read(); | |
| // read first analog input: | |
| firstSensor = analogRead(A0); | |
| // read second analog input: | |
| secondSensor = analogRead(A1); | |
| // read switch, map it to 0 or 255 | |
| thirdSensor = map(digitalRead(2), 0, 1, 0, 255); | |
| // send sensor values: | |
| Serial.print(firstSensor); | |
| Serial.print(","); | |
| Serial.print(secondSensor); | |
| Serial.print(","); | |
| Serial.println(thirdSensor); | |
| } | |
| } | |
| void establishContact() { | |
| while (Serial.available() <= 0) { | |
| Serial.println("0,0,0"); // send an initial string | |
| delay(300); | |
| } | |
| } | |
| /* Processing code to run with this example: | |
| // This example code is in the public domain. | |
| import processing.serial.*; // import the Processing serial library | |
| Serial myPort; // The serial port | |
| float bgcolor; // Background color | |
| float fgcolor; // Fill color | |
| float xpos, ypos; // Starting position of the ball | |
| void setup() { | |
| size(640, 480); | |
| // List all the available serial ports | |
| // if using Processing 2.1 or later, use Serial.printArray() | |
| println(Serial.list()); | |
| // I know that the first port in the serial list on my Mac is always my | |
| // Arduino board, so I open Serial.list()[0]. | |
| // Change the 0 to the appropriate number of the serial port that your | |
| // microcontroller is attached to. | |
| myPort = new Serial(this, Serial.list()[0], 9600); | |
| // read bytes into a buffer until you get a linefeed (ASCII 10): | |
| myPort.bufferUntil('\n'); | |
| // draw with smooth edges: | |
| smooth(); | |
| } | |
| void draw() { | |
| background(bgcolor); | |
| fill(fgcolor); | |
| // Draw the shape | |
| ellipse(xpos, ypos, 20, 20); | |
| } | |
| // serialEvent method is run automatically by the Processing applet whenever | |
| // the buffer reaches the byte value set in the bufferUntil() | |
| // method in the setup(): | |
| void serialEvent(Serial myPort) { | |
| // read the serial buffer: | |
| String myString = myPort.readStringUntil('\n'); | |
| // if you got any bytes other than the linefeed: | |
| myString = trim(myString); | |
| // split the string at the commas and convert the sections into integers: | |
| int sensors[] = int(split(myString, ',')); | |
| // print out the values you got: | |
| for (int sensorNum = 0; sensorNum < sensors.length; sensorNum++) { | |
| print("Sensor " + sensorNum + ": " + sensors[sensorNum] + "\t"); | |
| } | |
| // add a linefeed after all the sensor values are printed: | |
| println(); | |
| if (sensors.length > 1) { | |
| xpos = map(sensors[0], 0, 1023, 0, width); | |
| ypos = map(sensors[1], 0, 1023, 0, height); | |
| fgcolor = sensors[2]; | |
| } | |
| // send a byte to ask for more data: | |
| myPort.write("A"); | |
| } | |
| */ | |
| /* Max/MSP version 5 patch to run with this example: | |
| ----------begin_max5_patcher---------- | |
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| -----------end_max5_patcher----------- | |
| */ | |