Questions tagged [float]
A datatype in C/C++ which stores a single-precision floating point number.
83 questions
0 votes
2 answers
156 views
How to calculate the size of Arduino routines?
I want to design an Arduino Uno/Nano library (an alternative to floats that uses less RAM) that uses a minimum of code space after compilation. Is there a (not too complicated) way to calculate or ...
- 21
1 vote
1 answer
231 views
How do I convert a structure to a char[] for use in Wire.h, or is there a better way?
I need to interface an ATTiny88 MCU configured as an I²C slave with a Raspberry Pi configured as an I²C master. I may be using the wrong approach, but I have a structure consisting of four different ...
- 115
1 vote
1 answer
349 views
float miscalculation when int32_t variable is divided by 10 [duplicate]
i want to ask, how to get correct float value from uint32_t or long variable is devided by 10?? long var3 = 1139399025; int a = 3; int b = 10; void setup() { Serial.begin(9600); Serial.println((...
- 11
1 vote
1 answer
284 views
Why does the data I send to the server get rounded off and how do I send the entire float instead?
#include <Arduino.h> #include <WiFi.h> #include "WiFiManager.H" #include <HTTPClient.H> #include "ESPAsyncWebServer.h" #include <AsyncTCP.h> float version =...
- 35
2 votes
1 answer
1k views
Enable full float-capable snprintf() library with PlatformIO
I want to use snprintf() to format floats to a string. I know the "normal" version of Arduino's avrlibc had all the float-formatting code removed to make it smaller. I also know that at some ...
- 561
-1 votes
1 answer
705 views
parseFloat() function [duplicate]
I have noticed that the parseFloat() function returns decimal numbers, but only up to 2 decimal places. Would it be possible for it to return the numbers with more decimal places? In case we need more ...
- 29
-2 votes
1 answer
851 views
how to save float with 3 decimal places [duplicate]
i am transmitting sensor data from my atmega328p to my esp8266. The Sensordata has 3 decimal places. The esp8266 sends this data to my pc and there I see only two digits. This is because the data is ...
- 1
0 votes
3 answers
1k views
Problem on Sending float number and multiple float numbers
Im having trouble in sending float number and multiple float numbers. Im currently working on project matlab and arduino mkr1000. The situation is that i want to send float number and multiple float ...
1 vote
1 answer
4k views
Convert float to int error
I am trying to convert 1.06 to 106 by multiplying by 100 but the answer comes 105, I do not know why. Variable ver can be any decimal in this format x.xx float ver = 1.06; int vers = ver * 100; vm[0] =...
- 165
5 votes
1 answer
2k views
Serial monitor can't display float and double values with absolute greater than 4294967040=2^32-2^8
I have the following sketch: void setup() {} void loop() { float af = 4294967040.0; float bf = 4294967240.0; double ad = 4294967040.0; double bd = 4294967040.00001; Serial.println(af); ...
- 295
2 votes
1 answer
1k views
Convert float to byte, from Arduino to Raspberry Pi i2c
I'm trying to send the temperature value from the DHT sensor to a raspberry pi through I2C. Which is the best way to do it?. The temp value is a float, and I think I have to convert it to byte and ...
- 123
1 vote
0 answers
81 views
Math on analog read wrong result
I'm trying to execute a math of analog read but I get some weird result.. I searched about int and floats but didn't understand.. My code is : #include <SevSeg.h> SevSeg sevSeg; int bitsChange ...
- 11
1 vote
1 answer
180 views
Float switch is not detected
Good day everyone, forgive me for the shabby drawing I am just panicking, why my float switches are suddenly undetected by my Arduino mega. I've tested all the float switches one by one to confirm if ...
0 votes
2 answers
229 views
How to use float data from a sensor with the Arduino mouse library
I'm using a gyroscope, which returns angular velocity in floats. I'm trying to use this data with the arduino mouse library. The move function requires a signed character. I'm not what the best way is ...
- 367
0 votes
2 answers
1k views
Float to int conversion not working right in method using varargs
I am trying to convert a floating point number to an integer, but it seems like the conversion is not working properly. I am using the math library to calculate the power of 10 based on the number of ...
- 185