![]() This function can be optimized further by writing it in proper assembler code. Compared with solution using String object which compiled into 2,398 bytes, this implementation can reduce your code size by 1.2 Kb (assumed that you need no other String's object method, and your number is strict to signed int type). This sketch is compiled to 1,082 bytes of code using avr-gcc which bundled with Arduino v1.0.5 (size of int2str function itself is 594 bytes). ![]() It means after sending integer or string println send one more thing, that is new line. To assist compiler, we add register modifier into variable declaration to speed-up execution. The Arduino Serial println function does the same thing as compared to print, additionally println also send new line ( ) character in the end. Since it's only 7 bytes, the cost of fixed RAM usage is considered minimum. Thus the fastest solution is using conditional branches to build the string.Ī fixed 7 bytes buffer prepared from beginning in RAM to avoid dynamic allocation. But it was chosen for Arduino because, back then, no other language was efficient enough to run on such on such humble hardware. This implementation avoids using division since 8-bit AVR used for Arduino has no hardware DIV instruction, the compiler translate division into time-consuming repetitive subtractions. Serial.println('The dice rolled a ' + String(random(1, num + 1))) should also fix it C can be tricky It's not an ideal language for beginners. char buffer 30 int anInt 123 sprintf (buffer, 'Number d on the screen', anInt) Serial.println (buffer) pict April 8, 2017, 12:30pm 3. See here: To have more control over printing check out the C++ sprintf function. This is speed-optimized solution for converting int (signed 16-bit integer) into string. int anInt 123 Serial.print ('Number ') Serial.print (anInt) Serial.println (' on the screen') Or use the sprintf () sledgehammer. The Arduino print / println function casts the int to a long, which is 4 bytes long for Arduinos.
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