Python serial communication

Question

I\'m working on an Arduino project, and I am interfacing it with a Python script due to memory limitations. On the Python side I have a 2 dimensional matrix containing respectiv

Answer 1

You should wait a bit for the serial data to arrive.

The Arduino code should be:

if (Serial.available()){
    delay(100); // Wait for all data.
    while (Serial.available()) {
        char d = Serial.read();
        str.concat(d);
    }
}

Also you have to clear your string before re-using it.

[Edit]

I forgot to mention ÿ == -1 == 255 which means Serial.read() it is saying it can't read anything.