![]() ![]() 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). Then you use the sprintf () function to combine our text and variables into a string. First, you’ll create in a character array to save the output string. ![]() char buffer 30 int anInt 123 sprintf (buffer, 'Number d on the screen', anInt) Serial.println (buffer) pict April 8, 2017, 12:30pm 3. 3 Answers Sorted by: 3 Do something like this: Start with your string and integer: String string 'PI is equal to ' int integer 3.1416 Then put this in your loop: Serial.print (string) //string here Serial.print (integer) //int here Serial.println () //change line Serial.print () doesn't change line. Here are the three lines of code you’ll need: char buffer40 sprintf(buffer, 'The d burritos are s degrees F', numBurritos, tempStr) Serial.println(buffer) Let’s break each line down. 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). int anInt 123 Serial.print ('Number ') Serial.print (anInt) Serial.println (' on the screen') Or use the sprintf () sledgehammer. To assist compiler, we add register modifier into variable declaration to speed-up execution. 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. 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. Simple and safe: int answer 42 Serial.print ('The answer is ') Serial. This is speed-optimized solution for converting int (signed 16-bit integer) into string. However, it is always better to avoid using String objects if at all possible, because they use dynamic memory allocation, which carries some risk of memory fragmentation. ![]()
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