Read multiple variables with Processing, from Arduino

Using Arduino Interfacing w/ Software on the Computer
1

Hi to everyone,

someone of you could link me to a page in which is explained clearly how to read multiple variables in processing from a Serial port to which is connected an Arduino.

I need both the Arduino sketch and the Processing sketch.

I searched on the internet but I found too different solutions, with json, with firmata, with readuntil() etc...

Could you please tell me what is the most reliable?

Thanks,
Fab.

2

Could you please tell me what is the most reliable?

Write the values with start and end markers, and delimiters between the values.

Serial.print("<");
Serial.print(x);
Serial.print(", ");
Serial.print(y);
Serial.print(", ");
Serial.print(z);
Serial.println(">");

Processing will then receive something like "<12, 45, 78>". You can use bufferUntil() in Processing, to ensure that serialEvent() is only called when the carriage return/line feed is received. Then, the serial data will consist of the entire packet, which is then relatively easy to parse.