String and Float issue

Refer to problem of string and float from http://www.udoo.org/arduino-ide-serial-and-float-issue
I want to convert string to float look like code below, but got run-time error, Have anyone suggest how to convert ?

void setup(){
Serial.begin(9600);
}

char value[20] = "1234.567";

void loop(){
float float_value = atof(value);
Serial.println(float_value);
Delay(500);
}

Thanks

 

I`m more of a python person myself .

but shouldn`t that be :- double value = 1234.567; because you are trying to assigning a string to a double .

 

Remove the quotes.
float value = 123.456f;
Serial.println(value);

I assume that println takes a float.

 

I still have problem with Arduino sketch with atof() function. it nothing print out and loop freeze at function atof(). How can to fix it?

NOTE: i using Auduino Sketch run on Linaro Ubuntu 12.04 LTS

void setup(){
Serial.begin(9600);
}

char value[20] = "1234.567";

void loop(){
float float_value = atof(value);
Serial.println(float_value);
Delay(500);
}

 

You are not taking the big hint on the debug window .

sketch_may15a.ino: In function 'void loop()':
sketch_may15a:10: error: 'Delay' was not declared in this scope

delay(500); is not the same as Delay(500)'; c and c++ is case sensitive

TRY

Code:

void setup(){
Serial.begin(9600);
}

char value[20] = "1234.567";

void loop(){
float float_value = atof(value);
Serial.println(float_value);
delay(500);
}

 

HI peter,

yest, it must is delay(500) but still freeze at atof()

 

Sorry , but the above code is now good, no freeze
I`ve uploaded the code with the result of 1234.567 been displayed on the monitor , repeated every 1/2 a second ( 500 milliseconds ).
No problem with your code now it works like I guessed it would .

Try using your p.c to compile your code and try download the lastest version of arduino for the due . ( 1.5.6 ) pc / mac

 

Thanks Peter

I found problem, above code good for Debian Wheezy but the same code it doesn't work on Linaro Ubutu (both linux I download from Udoo website)
both OS installed Arduino 1.5.4 version, may i will try to update Arduino for Ubuntu.