Attempting asynchronous communication between Arduino and Processing...it's not going well. :(

kaihansen..

Attempting asynchronous communication between Arduino and Processing...it's not going well. :(

in Integration and Hardware • 1 year ago

I've been basing both programs off of the SerialCallResponse example in Arduino 1.0 ( http://arduino.cc/en/Tutorial/SerialCallResponse ) to get them to talk. Perhaps it was never meant for something like this though.

In a nutshell, I want to first send 15 Arduino sensor values to Processing; then write 6 Processing values to the Arduino; lastly, I was looking to return those last 6 values to Processing to confirm that they were recorded.

Any advice or corrections would be greatly appreciated. I've been struggling with this for a bit now. At any rate here are the println responses generated through my debugging efforts:

Stable Library

=========================================

Native lib Version = RXTX-2.1-7

Java lib Version = RXTX-2.1-7

firstContact == false

inByte == 'A'

secondContact == false

thirdContact == false

didn't receive sensor data

goes on like this for a while

didn't receive sensor data

secondContact == false

thirdContact == false

138 //confirmation of the first value in the array received

serialCount == 15; 'Z' has been given to arduino; it should begin getData() now

secondContact == false

thirdContact == false

firstContact == false

inByte == 'A'

secondContact == false

thirdContact == false

didn't receive sensor data

goes on like this for a while

thirdContact == false

didn't receive sensor data

secondContact == false

inByte == 'B' + 'B'

thirdContact == false

didn't receive sensor data

secondContact == true

weather and preferences and 'Y' have been sent to arduino

thirdContact == false

didn't receive sensor data

secondContact == false

goes on like this for a while

thirdContact == false

didn't receive sensor data

secondContact == false

inByte == 'B' + 'B'

thirdContact == false

didn't receive sensor data

secondContact == true

weather and preferences and 'Y' have been sent to arduino

thirdContact == false

didn't receive sensor data

secondContact == false

goes on like this for a while

didn't receive sensor data

secondContact == false

thirdContact == false

didn't receive sensor data

secondContact == false

thirdContact == false

131

serialCount == 15; 'Z' has been given to arduino; it should begin getData() now

secondContact == false

thirdContact == false

firstContact == false

goes on like this for a while

thirdContact == false

firstContact == false

secondContact == false

inByte == 'B' + 'B'

thirdContact == false

firstContact == false

secondContact == true

weather and preferences and 'Y' have been sent to arduino

thirdContact == false

firstContact == false

secondContact == false

goes on like this for a while

secondContact == false

thirdContact == false

firstContact == false

secondContact == false

inByte == 'B' + 'B'

thirdContact == false

firstContact == false

secondContact == true

weather and preferences and 'Y' have been sent to arduino //it's odd that it's skipping

thirdContact == false

firstContact == false

secondContact == false

thirdContact == false

firstContact == false

secondContact == false

inByte == 'B' + 'B'

thirdContact == false

firstContact == false

secondContact == true

weather and preferences and 'Y' have been sent to arduino

thirdContact == false

firstContact == false

secondContact == false

inByte == 'B' + 'B'

thirdContact == false

firstContact == false

secondContact == true

weather and preferences and 'Y' have been sent to arduino

thirdContact == false

firstContact == false

secondContact == false

goes on like this for a while

thirdContact == false

firstContact == false

secondContact == false

inByte == 'B' + 'B'

thirdContact == false

firstContact == false

secondContact == true

weather and preferences and 'Y' have been sent to arduino

thirdContact == false

firstContact == false

keeps going until I kill the program

Code for both Arduino and Processing classes are here (password = Adaptive): http://robofacades.wordpress.com/code-hosting/acm11-facadeagent14/

Here is my processing code:

int[] serialInArray = new int[15]; // Where we'll put what we receive
int[] serialInArray3 = new int[6];
int serialCount = 0; // A count of how many bytes we receive
boolean firstContact = false; // Whether we've heard from the microcontroller
boolean secondContact = false;
boolean thirdContact = false;
void serialEvent(Serial comPort4){
int inByte = comPort4.read();
if (firstContact == false) {
delay(25);
println("firstContact == false");
if (inByte == 'A') {
comPort4.clear(); // clear the serial port buffer
firstContact = true; // you've had first contact from the microcontroller
comPort4.write('A'); // ask for more
delay(25);
println("inByte == 'A'");
}
}
else if (firstContact = true){
delay(25);
// Add the latest byte from the serial port to array:
serialInArray[serialCount] = inByte;
serialCount++;
if (serialCount > 14 ) { //reference to arduino values
//println("serialCount > 14");
intLightSens1 = serialInArray[0];
intLightSens2 = serialInArray[1]; //intLightSens1, intLightSens2, intLightSens3, avgInteriorLight, extLightSens1, extLightSens2, extLightSens3, extLightSens4, extLightSens5, solarPosition, actuatorPercent
intLightSens3 = serialInArray[2];
avgInteriorLight = serialInArray[3]; //temp_c_indoor 11, temp_f_indoor 12, dewpoint_f_indoor 13, relative_humidity_indoor 14
extLightSens1 = serialInArray[4];
extLightSens2 = serialInArray[5];
extLightSens3 = serialInArray[6];
extLightSens4 = serialInArray[7];
extLightSens5 = serialInArray[8];
solarPosition = serialInArray[9];
actuatorPercent = serialInArray[10];
temp_c_indoor = serialInArray[11];
temp_f_indoor = serialInArray[12];
dewpoint_f_indoor = serialInArray[13];
relative_humidity_indoor = serialInArray[14];
//comPort4.clear();
delay (50);
comPort4.write('Z');
firstContact = false; //reset boolean
serialCount = 0;
println(intLightSens1);
println("serialCount == 15; 'Z' has been given to arduino; it should begin getData() now");
}
else{
println("didn't receive sensor data");
}
}
if (secondContact == false) {
delay(25);
println("secondContact == false");
//comPort4.clear();
if (inByte == 'B' + 'B') {
comPort4.clear(); // clear the serial port buffer
secondContact = true; // you've had second contact from the microcontroller
comPort4.write('B' + 'B'); // ask for more
delay(25);
println("inByte == 'B' + 'B'");
}
}
else if (secondContact = true) {
delay(25);
comPort4.write(temp_f);
comPort4.write(relative_humidity);
comPort4.write(dewpoint_f);
comPort4.write(desiredInteriorLight);
comPort4.write(desiredIndoorHumidity);
comPort4.write(desiredIndoorTemp_f);
delay(25);
//comPort4.clear();
secondContact = false; //reset boolean
comPort4.write('Y');
serialCount = 0;
println("secondContact == true");
println("weather and preferences and 'Y' have been sent to arduino");
}
if (thirdContact == false) {
println("thirdContact == false");
if (inByte == 'C' + 'C' + 'C') {
comPort4.clear(); // clear the serial port buffer
thirdContact = true; // third contact from the microcontroller
comPort4.write('C' + 'C' + 'C'); // ask for more
delay(25);
println("inByte == 'C' + 'C' + 'C'");
}
}
else if (thirdContact == true) {
delay(25);
println("thirdContact == true");
serialInArray3[serialCount] = inByte;
serialCount++;
if (serialCount > 5 ) {
println (serialInArray3[0]);
println (serialInArray3[1]);
println (serialInArray3[2]);
println (serialInArray3[3]);
println (serialInArray3[4]);
println (serialInArray3[5]);
println("serialCount == 6; 'X' was sent and loop should restart");
//comPort4.clear();
delay (50);
comPort4.write('X');
serialCount = 0; // Reset serialCount
thirdContact = false; //reset boolean
}
else{
println("didn't receive serialInArray3 from arduino");
}
}
}

And the Arduino code:

//int inByte = 0;
//boolean secondContact = false;
//int serialInArray[6]; // Where we'll put what we receive
//int serialCount = 0; // A count of how many bytes we receive
void logData() {
Serial.read();
establishContact(); // send a byte to establish contact until receiver responds
if (Serial.available() > 0) {
//int writeSensorArray[] = {photoCell1, photoCell2, photoCell3, avgInteriorLight, photoCell4, photoCell5, photoCell6, photoCell7, photoCell8, solarPosition, actuatorPercent, temp_c_indoor, temp_f_indoor, relative_humidity_indoor, dewpoint_f_indoor};
Serial.write(photoCell1);
Serial.write(photoCell2);
Serial.write(photoCell3);
Serial.write(avgInteriorLight);
Serial.write(photoCell4);
Serial.write(photoCell5);
Serial.write(photoCell6);
Serial.write(photoCell7);
Serial.write(photoCell8);
Serial.write(solarPosition);
Serial.write(actuatorPercent);
Serial.write(temp_c_indoor);
Serial.write(temp_f_indoor);
Serial.write(relative_humidity_indoor);
Serial.write(dewpoint_f_indoor);
}
if (Serial.read() == 'Z'){
confirmReceipt();
getData();
}
if (Serial.read() == 'Y'){
confirmReceipt2();
delay(50);
confirmGetData();
}
if (Serial.read() == 'X'){
Serial.end();
}
}
void getData(){
int serialInArray[6] = {Serial.read()};
temp_f = serialInArray[0];
relative_humidity = serialInArray[1];
dewpoint_f = serialInArray[2];
desiredInteriorLight = serialInArray[3];
desiredIndoorHumidity = serialInArray[4];
desiredIndoorTemp_f = serialInArray[5];
}
void confirmGetData() {
Serial.write(temp_f);
Serial.write(relative_humidity);
Serial.write(dewpoint_f);
Serial.write(desiredInteriorLight);
Serial.write(desiredIndoorHumidity);
Serial.write(desiredIndoorTemp_f);
}
void establishContact() {
while (Serial.available() <= 0) {
Serial.print('A'); // send a capital A
delay(300);
}
}
void confirmReceipt() {
while (Serial.available() <= 1) {
Serial.write('B' + 'B'); // send a capital B
delay(300);
}
}
void confirmReceipt2() {
while (Serial.available() <= 2) {
Serial.print('C' + 'C' + 'C'); // send a capital C
delay(300);
}
}

Replies(3)

kaihansen..

Re: Attempting asynchronous communication between Arduino and Processing...it's not going well. :(

1 year ago

Okay, so I'm still struggling with this one. Can anybody see what I'm doing wrong??? I'm using an Arduino Mega w/ 2 serial ports enabled.

Edit: It appears that it's getting stuck in the establishContact2() loop. The lcd screen that I have hooked up to the Arduino acts accordingly: first showing A's, but then getting stuck on B infinitely.

Here's my latest code:

Processing:

void serialEvent(Serial comPort){
if (comPort == comPort4) {
println("comPort4 active");
int inByte = comPort4.read();
if (firstContact == false) {
println("firstContact == false");
if (inByte == 'A') {
comPort4.clear(); // clear the serial port buffer
firstContact = true; // you've had first contact from the microcontroller
comPort4.write('A'); // ask for more
println("inByte == 'A'");
}
}
else {
// Add the latest byte from the serial port to array:
serialInArray[serialCount] = inByte;
serialCount++;
if (serialCount > 14 ) { //reference to arduino values
println("serialCount > 14");
intLightSens1 = serialInArray[0];
intLightSens2 = serialInArray[1]; //intLightSens1, intLightSens2, intLightSens3, avgInteriorLight, extLightSens1, extLightSens2, extLightSens3, extLightSens4, extLightSens5, solarPosition, actuatorPercent
intLightSens3 = serialInArray[2];
avgInteriorLight = serialInArray[3]; //temp_c_indoor 11, temp_f_indoor 12, dewpoint_f_indoor 13, relative_humidity_indoor 14
extLightSens1 = serialInArray[4];
extLightSens2 = serialInArray[5];
extLightSens3 = serialInArray[6];
extLightSens4 = serialInArray[7];
extLightSens5 = serialInArray[8];
solarPosition = serialInArray[9];
actuatorPercent = serialInArray[10];
temp_c_indoor = serialInArray[11];
temp_f_indoor = serialInArray[12];
dewpoint_f_indoor = serialInArray[13];
relative_humidity_indoor = serialInArray[14];
comPort4.write('B');
serialCount = 0;
println(intLightSens1);
//println("serialCount == 15");
}
else{
println("didn't receive sensor data");
}
}
}
else if (comPort == comPort5){
println("comPort5 active");
int inByte = comPort5.read();
if (secondContact == false) {
println("secondContact == false");
if (inByte == 'B') {
println("inByte == 'B'");
comPort5.clear(); // clear the serial port buffer
secondContact = true; // you've had first contact from the microcontroller
comPort5.write('B'); // ask for more
}
}
else{
//comPort5.clear();
//if (comPort5.available() > 0) {
int[] weatherDataArray = {temp_f, relative_humidity, dewpoint_f, desiredInteriorLight, desiredIndoorHumidity, desiredIndoorTemp_f};
//comPort5.write(weatherDataArray);
comPort5.write(temp_f);
comPort5.write(relative_humidity);
comPort5.write(dewpoint_f);
comPort5.write(desiredInteriorLight);
comPort5.write(desiredIndoorHumidity);
comPort5.write(desiredIndoorTemp_f);
comPort5.write('A');
println("temp_f = " + weatherDataArray[0]);
println("weather and preferences have been sent to arduino");
//}
// else{
// println("comPort5 not available");
}
}
}

Arduino:

int serialInArray1[6]; // Where we'll put what we receive
int serial1Count = 0; // A count of how many bytes we receive
void logData() {
Serial.read();
establishContact(); // send a byte to establish contact until receiver responds
if (Serial.available() > 0) {
//int writeSensorArray[] = {photoCell1, photoCell2, photoCell3, avgInteriorLight, photoCell4, photoCell5, photoCell6, photoCell7, photoCell8, solarPosition, actuatorPercent, temp_c_indoor, temp_f_indoor, relative_humidity_indoor, dewpoint_f_indoor};
Serial.write(photoCell1);
Serial.write(photoCell2);
Serial.write(photoCell3);
Serial.write(avgInteriorLight);
Serial.write(photoCell4);
Serial.write(photoCell5);
Serial.write(photoCell6);
Serial.write(photoCell7);
Serial.write(photoCell8);
Serial.write(solarPosition);
Serial.write(actuatorPercent);
Serial.write(temp_c_indoor);
Serial.write(temp_f_indoor);
Serial.write(relative_humidity_indoor);
Serial.write(dewpoint_f_indoor);
}
}
void establishContact() {
while (Serial.available() <= 0) {
Serial.print('A'); // send a capital A
lcd.print('A');
delay(300);
}
}
void getProcessing(){
Serial1.read();
establishContact2(); //gets stuck here
if (Serial1.available() > 0){
int inByte[] = {Serial1.read()};
temp_f = inByte[0];
relative_humidity = inByte[1];
dewpoint_f = inByte[2];
desiredInteriorLight = inByte[3];
desiredIndoorHumidity = inByte[4];
desiredIndoorTemp_f = inByte[5];
}
}
void establishContact2() {
while (Serial1.available() <= 0) {
Serial1.print('B'); // send a capital B
lcd.print('B');
delay(300);
}
}

This code seems to get me caught in a loop. The values sent from the Arduino are received on the first pass, then I get caught up in the establishContact function and 'A' is continually printed. ComPort5 never seems to activate.

kaihansen..

Re: Attempting asynchronous communication between Arduino and Processing...it's not going well. :(

1 year ago

It seems that Processing is not receiving the 'B' character, since the RX light on the usb serial adapter is not even going off even though the LCD is displaying 'B'.

kaihansen..

Re: Attempting asynchronous communication between Arduino and Processing...it's not going well. :(

1 year ago

Alrighty, got it figured out. I was doing two things wrong, one innocent and one totally bone-headed.

The dumb-dumb thing I was doing was not alternating the RX and TX pins for the USB Serial Adapter and Mega boards. I just assumed that the labels should match up.

Secondly, I needed to add a comPort.clear() function at the end of each else statement (see edited code in bold red type below):

String getRawArduino;
String writeRawArduino;
float temp_c_indoor;
float temp_f_indoor;
float relative_humidity_indoor;
float dewpoint_f_indoor;
int intLightSens1;
int intLightSens2;
int intLightSens3;
int extLightSens1;
int extLightSens2;
int extLightSens3;
int extLightSens4;
int extLightSens5;
int avgInteriorLight;
int solarPosition;
int actuatorPercent;
int[] serialInArray = new int[15]; // Where we'll put what we receive
int serialCount = 0; // A count of how many bytes we receive
boolean firstContact = false; // Whether we've heard from the microcontroller
boolean secondContact = false;
void serialEvent(Serial comPort){
if (comPort == comPort4) {
println("comPort4 active");
int inByte = comPort4.read();
if (firstContact == false) {
println("firstContact == false");
if (inByte == 'A') {
comPort4.clear(); // clear the serial port buffer
firstContact = true; // you've had first contact from the microcontroller
comPort4.write('A'); // ask for more
println("inByte == 'A'");
}
}
else {
// Add the latest byte from the serial port to array:
serialInArray[serialCount] = inByte;
serialCount++;
if (serialCount > 14 ) { //reference to arduino values
println("serialCount > 14");
intLightSens1 = serialInArray[0];
intLightSens2 = serialInArray[1]; //intLightSens1, intLightSens2, intLightSens3, avgInteriorLight, extLightSens1, extLightSens2, extLightSens3, extLightSens4, extLightSens5, solarPosition, actuatorPercent
intLightSens3 = serialInArray[2];
avgInteriorLight = serialInArray[3]; //temp_c_indoor 11, temp_f_indoor 12, dewpoint_f_indoor 13, relative_humidity_indoor 14
extLightSens1 = serialInArray[4];
extLightSens2 = serialInArray[5];
extLightSens3 = serialInArray[6];
extLightSens4 = serialInArray[7];
extLightSens5 = serialInArray[8];
solarPosition = serialInArray[9];
actuatorPercent = serialInArray[10];
temp_c_indoor = serialInArray[11];
temp_f_indoor = serialInArray[12];
dewpoint_f_indoor = serialInArray[13];
relative_humidity_indoor = serialInArray[14];
comPort4.clear();
comPort4.write('A');
serialCount = 0;
println(intLightSens1);
//println("serialCount == 15");
}
else{
println("didn't receive sensor data");
}
}
}
else if (comPort == comPort5){
println("comPort5 active");
int inByte = comPort5.read();
if (secondContact == false) {
println("secondContact == false");
if (inByte == 'B') {
println("inByte == 'B'");
comPort5.clear(); // clear the serial port buffer
secondContact = true; // you've had first contact from the microcontroller
comPort5.write('B'); // ask for more
}
}
else{
//if (comPort5.available() > 0) {
int[] weatherDataArray = {temp_f, relative_humidity, dewpoint_f, desiredInteriorLight, desiredIndoorHumidity, desiredIndoorTemp_f};
//comPort5.write(weatherDataArray);
comPort5.write(temp_f);
comPort5.write(relative_humidity);
comPort5.write(dewpoint_f);
comPort5.write(desiredInteriorLight);
comPort5.write(desiredIndoorHumidity);
comPort5.write(desiredIndoorTemp_f);
comPort5.clear();
comPort5.write('B');
println("temp_f = " + weatherDataArray[0]);
println("weather and preferences have been sent to arduino");
//}
// else{
// println("comPort5 not available");
}
}
}

I hope this helps someone down the road.

Cheers!

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