[SOLVED] Low performance using readBytes()

hello,

i'm using function readbytes() follows:

code: [select]


void loop() {
 if(serial.available()>0)
 {
   bytesread = serial.readbytes(buffer,10);
   buffer[bytesread] = '\0';
   strg = buffer;
   
   if(strg.substring(0,1) == "r")  serial.println("ok");
}


i'm having low performance (it takes 1 second print "ok"). however, if change length 1 (serial.readbytes(buffer,1)) prints "ok" immediately. need high performance , length 10. do?

the readbytes() function being asked read 10 bytes. so, if there 20 in buffer, return right away 10 bytes. if, instead, there 3 bytes, function going wait time expire or 7 more bytes arrive.

what sending data? have control on sender?

there other methods use, readbytesuntil(), block until specific character arrived.

or, read data, , store in array, , deal contents of array (not string).

using substring() extract, , discard, string waste. there [] operator give specific character @ position, without overhead of constructing , destructing string. or 2 of them in snippet.

quote

i need high performance

but i'm willing piss away time using strings...

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