How to draw real-time data in a specific canvas area？

[GoToLoop]

@svan

But if I ever see a problem in Processing’s serialEvent() after adding a carriage return I could be convinced to change.

We can completely drop the ','& '\n' separator characters and just use the buffer() method:

Using two different readStringUntil "characters"

Now that it seems all’s been sorted out, how about some optimization? The range [-10 to 10] is so small (5-bit) that it comfortably fits in a byte (8-bit). So, rather than send those 2 small values as TSV, w/ lotsa extra separator characters, we can simply send 2 bytes only using Serial.write(): https://www.Arduino.cc/reference/en/language/functions/communication/serial/write/ We just need to create a char array of length = 2: signed char xy[2]; #define BAUDS 115200 #define DELAY 10 #define…