December 9, 2011 - Hi, I am trying to convert a float to an int and round up/down as necessary. This works to convert to an int. #include <Math.h> void setup() { Serial.begin(9600); } void loop() { float z = 78.923; int a = (int) …

January 13, 2020 - Hello, I've been trying to create a function myself without any luck. I need to round floating values that looks like this "12.45" for example. Two numbers before and after the dot. Normal round function rounds up at number being 5. I need it to round up at 6 and if below 6 it should round ...

May 15, 2024 - Arduino programming language can be divided in three main parts: functions, values (variables and constants), and structure · For controlling the Arduino board and performing computations

June 24, 2015 - Are there functions available for the Arduino to round or truncate floating point (real) values?

July 10, 2017 - Im just beginner so please dont throw stones on me :-). I am getting stream via serial to arduino, stream is coming from other arduino as ascii chars. Around 140 chars per request. I need to round and truncate floats to 2 decimal points then compare with other floats which have 2 decimal precision.

April 28, 2022 - I have problem. SHT temperature is 24.37 and rouding temp = 24.37 and it should have been 24.3. Why does it still show two decimal places? I have code: float temp = (sht.getTemperature() * 10) / 10; float temp = (raw * 10) / 10;

July 20, 2019 - Hey folks, need bit of help with formatting variables. Is there some elegant way how to do exactly what this does Serial.println(123.422,1); which outputs to the console 123.4 But I need more like this float value = 123.455; value = (value,1); output += String(value); But it does not work, it’s just doing 1 in the output I kind of wanted to avoid doing this float x = 123.455; x = x + 0.05; //123.506 x = x*10.0; //1235.06 int y = (int)x; //1235 float z = (float)y/10.0; //1...

March 20, 2017 - // Arduino IDE 1.81 with Arduino Uno // The "#undef round" removes the round() macro in Arduino.h // Try with and without the #undef round // #undef round void setup() { float x; Serial.begin( 9600); x = 15.0; x = round( x) / 10; // a integer division with the macro Serial.println( x); // wrong value with the macro x = 15.0; x = round( x) / 10.0; // always calculated with floats Serial.println( x); // always okay x = 15.0; x = round( x); x /= 10; // always calculated with floats Serial.println( x); // always okay x = 1.5E+20; x = round( x); // the macro fails x /= 1E+20; // make it printable with Serial.println Serial.println( x); // wrong value with macro } void loop() { } Reactions are currently unavailable ·

January 12, 2012 - I like to develop my formulae in a spreadsheet, before moving it into code. I often use round() in my spreadsheet work, and copied a formula using that to Arduino, not realizing that round() does not exist in the Arduino reference. I've seen some convoluted ways to make numbers round up or down, but find the generic C/C++ Round function, round(), works just fine: a = round(b); If b = 12.5, then a = 12, but if b = 12.6, then a = 13. http://www.codecogs.com/reference/computing/c/math.h/round.p...

April 26, 2020 - I have a number that is determined from some parameters for some LED's and to calculate them correctly i need to ensure the number i always rounded up to the nearest integer regardless of whether its 1.008 or 1.95 howeve…

May 15, 2024 - Arduino programming language can be divided in three main parts: functions, values (variables and constants), and structure · For controlling the Arduino board and performing computations

May 5, 2023 - **Using a string to display temperature on an OLED Hello I just dont get it on how to properly to format a string. The goal, print temperature and humidity using a fix 3 characters spaces. I did look at Sprintf, but I dont get it. some info: The string is limited to 10 characters per line Each line is 3 characters for actual temperature + 3 spaces + 3 characters for the target temperature + ("C" or "F") Each data on a line be always aligned.

December 17, 2022 - I am trying to send the voltage of my esp8266 with some gpio details through mqtt. For this I am trying to round the voltage to decimal places and then send mqtt but not matter what I try, it doesn't round the voltage. I have already defined every variables earlier which is not present in the ...

March 27, 2021 - I can't find the reference on how the print() function handles floats. I've been under the impression that if a = 1.346 print(a) // would print out 1.34 and print(a + .005) // would print out 1.35 my question is, in the case of floats, does the print() function round the argument before printing?