Description
Serial.readBytes() reads characters from the serial port into a buffer. The function terminates if the determined length has been read, or it times out (see Serial.setTimeout()).
I'm starting to build my first Arduino project but I'm running into some problems with serial communication. I get serial data from the console and store it in a char array called 'data'. Then, when I send a new console message to the Arduino, I want it to clear the existing 'data' array and store only the new data in that array.
Serial.readBytes() returns the number of characters placed in the buffer. A 0 means no valid data was found.
Serial.readBytes() inherits from the Stream utility class.
Serial.write(27); // ESC command Serial.print('2J'); // clear screen command Serial.write(27); Serial.print('H'); // cursor to home command But it doesn't work. I also found a solution like Serial.println; but that solution (cheat as they called it) will only work on a serial monitor. So is there any possible solution to clear the display. Also, there is an app in the play store called 'Serial USB Terminal' by Kai Morich. With this app you can quickly and easily test your serial parameters from your phone to device to make sure it is working properly. For example, with the arduino connected running the above sketch, entering a '1' into this app returns a '4' on the terminal. In the Arduino library, the Serial object has a method called “flush.” Often users go throwing it into programs without fully understanding what it does. It doesn’t help that it’s functionality changed when version 1.0 of the Arduino IDE was released. Does Serial.flush affect the Transmit Buffer or the Receive Buffer and when do you need. It is not clear what do you really want to do. Anyway, please note: In your C# code, if you enter, for instance, '1' in your TextBox then four bytes are sent to the serial line: three 0s and a single 1 (the 0s won't be handled by your Arduino code). In your Arduino code you didn't check if Serial.read returns -1 (i.e. No data available).
Syntax
Parameters
Serial: serial port object. See the list of available serial ports for each board on the Serial main page.buffer: the buffer to store the bytes in. Allowed data types: array of char or byte.length: the number of bytes to read. Allowed data types: int.
Returns
Arduino Clear Serial Buffer
The number of bytes placed in the buffer. Data type: size_t.