TouchDesigner Send Data to Arduino — Tutorial in TouchDesigner

TouchDesigner connect Arduino : Arduino Receive Data from TouchDesigner sending

TouchDesigner Side

Like sending data from Arduino to TouchDesigner. Get a Serial (DAT) first. And I used the One Per Byte here because of the case needed. (In the Serial (DAT) panel, the parameter “Row/Callback Format”)

Also, need to setup Port & Serial Baud Rate. You can refer

Arduino Send Data to TouchDesigner— Tutorial in TouchDesigner

Script of sending data out.

def onStart():
    op(‘forArduinoOutput’).send('n', terminator='\n')
    return

I used onStart() function because I link Execute (DAT) to trigger that script.

“forArduinoOutput” is my Serial (DAT) name, and using send() to send the data out.

“n” is what string you want to send. “terminator=’\n’ ” let receiver knows the string is end and create a new line.

Arduino Side

Full Code

void setup() {
  Serial.begin(9600);
}
void loop() {
    String s = "";
    while (Serial.available()) {
        char c = Serial.read();
        if (c != '\n') {
            s += c;
        }
    }
    if (s != "") {
        if (s == "word") {
            // Execute Something
        }
    }
}

Explain

We setup Serial Baud Rate “9600” first.

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

In the loop() function, we have to checking the Serial whether connect or not.

while (Serial.available()) {
}

Once connected, reading the data from Serial. But now we got are the byte data. We have to re-connect them to be a string. And adding if to know where is the end of string. That’s why we add “\n” to the all string in TouchDesigner.

char c = Serial.read();
if (c != '\n') {
    s += c;
}

Last step, you can use the data to run any script you want. For example, I checked if the data equal to “word”, then execute something.

if (s != "") {
    if (s == "word") {
        // Execute Something
    }
}