Can't save the value of the function on the ext file

[senior-student]

Hi every one,

I am using a wireless sensoe, and it has its own compiler with c language.
what i want is to save the accelerometer value on a text file on the SD card of the wireless.
The sensor has an accelerometer library.
my problem is when i want to write to the text value the value of the function not the value of the function.
so i tried another manner and i got an error.

Here is my code:

---

Code C - [expand]
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
const char* filename="data.txt";
void setup(){
  //setup for Serial port
  USB.begin();
 
 SD.ON();
  // setup the GPS module
  USB.println("Setting up GPS...");
  
   ACC.ON();
  
  // waiting for GPS is connected to satellites
  while( !ACC.check()) delay(1000);
  
  USB.println("Connected");
 
}
 
void loop(){
 byte check = ACC.check();
  // Getting Time
 uint8_t x_acc = ACC.getX();
 
  //----------Y Values-----------------------
  int y_acc = ACC.getY();
 
  //----------Z Values-----------------------
  int z_acc = ACC.getZ();
  USB.print("\n------------------------------\nCheck: 0x"); 
  USB.println(check, HEX);
  USB.println("\n \t0X\t0Y\t0Z"); 
  USB.print(" ACC\t"); 
  USB.print(x_acc, DEC);
  USB.print("\t"); 
  USB.print(y_acc, DEC);
  USB.print("\t"); 
  USB.println(z_acc, DEC);
  
  SD.appendln("data.txt",":"); 
  SD.appendln("data.txt",x_acc);
  SD.appendln("data.txt",":");
  SD.appendln("data.txt",y_acc);
  SD.appendln("data.txt",":");
  SD.appendln("data.txt",z_acc);
  
  
  USB.println("Write to 'data.txt' ");
 
}

---

and here is the error what i got:

In function 'void loop()':
error: call of overloaded 'appendln(const char [9], uint8_t&)' is ambiguousC:\Users\Administrator.hkfong-PC\Desktop\waspmote-ide-v.02-windows\waspmote-ide-v.02-windows\hardware\cores\waspmote-api-v.029/WaspSD.h:593: note: candidates are: uint8_t WaspSD::appendln(const char*, const char*) <near match>
C:\Users\Administrator.hkfong-PC\Desktop\waspmote-ide-v.02-windows\waspmote-ide-v.02-windows\hardware\cores\waspmote-api-v.029/WaspSD.h:602: note:                 uint8_t WaspSD::appendln(const char*, uint8_t*) <near match>

hope you can help me.
thanks and regards

 

[jayanth.devarayanadurga]

I think appendln() function takes strings as arguments. You are passing x-acc, y_acc, z_acc to the function. They are integer variables. So you have to convert x_acc, y_acc, and z_acc to strings and pass the strings as arguments to appendln() function.

 

[senior-student]

I think appendln() function takes strings as arguments. You are passing x-acc, y_acc, z_acc to the function. They are integer variables. So you have to convert x_acc, y_acc, and z_acc to strings and pass the strings as arguments to appendln() function.

Can u please provide for me a simple example of converting integer to string

 

[senior-student]

Any one can help me by telling me how to convert integer to string please?

- - - Updated - - -

Any one can help me by telling me how to convert integer to string please?

 

[jayanth.devarayanadurga]

string[0] = (number/1000) + 48;
string[1] = (number/100)%10 + 48;
string[2] = (number/10)%10 + 48;
string[3] = (number/1)%10 + 48;
string[4] = '\0'


SD.appendln("data.txt",":"); 
SD.appendln("data.txt",string);
SD.appendln("data.txt",":");
SD.appendln("data.txt",string);
SD.appendln("data.txt",":");
SD.appendln("data.txt",string);

 

[senior-student]

when i tried what you wrote i got this error:

In function 'void loop()':
error: 'string' was not declared in this scope

and this is my code:

const char* filename="data.txt";
void setup(){
  //setup for Serial port
  USB.begin();
 
 SD.ON();
  // setup the Accelerometer module
  USB.println("Setting up Accelerometer...");
  
   ACC.ON();
  
  // waiting for Accelerometer is connected to satellites
  while( !ACC.check()) delay(1000);
  
  USB.println("Connected");
 
}
 
void loop(){
 byte check = ACC.check();
 //----------X Values-----------------------
 uint8_t x_acc = ACC.getX();
 
  //----------Y Values-----------------------
  int y_acc = ACC.getY();
 
  //----------Z Values-----------------------
  int z_acc = ACC.getZ();
  USB.print("\n------------------------------\nCheck: 0x"); 
  USB.println(check, HEX);
  USB.println("\n \t0X\t0Y\t0Z"); 
  USB.print(" ACC\t"); 
  USB.print(x_acc, DEC);
  USB.print("\t"); 
  USB.print(y_acc, DEC);
  USB.print("\t"); 
  USB.println(z_acc, DEC);
  
        string[0] = (x_acc/1000) + 48;
        string[1] = (x_acc/100)%10 + 48;
	string[2] = (x_acc/10)%10 + 48;
	string[3] = (x_acc/1)%10 + 48;
	string[4] = '\0'
  
	SD.appendln("data.txt",":"); 
	SD.appendln("data.txt",string);
	SD.appendln("data.txt",":");
	SD.appendln("data.txt",string);
	SD.appendln("data.txt",":");
	SD.appendln("data.txt",string);
  
  
  USB.println("Write to 'data.txt' ");
 
}

 

[jayanth.devarayanadurga]

If string is not declared then declare it like this

 unsigned char string[5];

Declare it in Void Main() { } or as global variable.

unsigned char str_x_acc[5], str_y_acc[5], str_z_acc[5];



str_x_acc[0] = (x_acc/1000) + 48;
str_x_acc[1] = (x_acc/100)%10 + 48;
str_x_acc[2] = (x_acc/10)%10 + 48;
str_x_acc[3] = (x_acc/1)%10 + 48;
str_x_acc[4] = '\0'
  
SD.appendln("data.txt",":"); 
SD.appendln("data.txt",str_x_acc);

str_y_acc[0] = (y_acc/1000) + 48;
str_y_acc[1] = (y_acc/100)%10 + 48;
str_y_acc[2] = (y_acc/10)%10 + 48;
str_y_acc[3] = (y_acc/1)%10 + 48;
str_y_acc[4] = '\0'

SD.appendln("data.txt",":");
SD.appendln("data.txt",str_y_acc);

str_z_acc[0] = (z_acc/1000) + 48;
str_z_acc[1] = (z_acc/100)%10 + 48;
str_z_acc[2] = (z_acc/10)%10 + 48;
str_z_acc[3] = (z_acc/1)%10 + 48;
str_z_acc[4] = '\0'

SD.appendln("data.txt",":");
SD.appendln("data.txt",str_z_acc);

 

[senior-student]

i solved the problem with this function "sprintf
thank you for ur support