[SOLVED] String + int code doesn't work

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andihong

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i have a code for arduino that need a string with variable to redirect the value to mysql


here the example of code.

int input = sht1x.readTemperatureC();

i want to get the variable inside the string on HttpPost.

here the code
httpPOST("http:xxx.com", 80, "/tes.php", "(i want to get it inside here)", msg, 50);
Code: 
httpPOST("http:xxx.com", 80, "/tes.php", "input="+input+"", msg, 50);

the code doesn't work, is there any way to convert it ?
 
Last edited by a moderator:

Try converting input to string and pass the string to httpPOST() like this.

Code: 
httpPOST("http:xxx.com", 80, "/tes.php", str, msg, 50);

str is the string which holds the int value converted to string.

For better help, zip and post the Arduino sketch and necessary Arduino libraries.

- - - Updated - - -

Try this

Code: 
int input = sht1x.readTemperatureC();
String myStr = String(input);
httpPOST("http:xxx.com", 80, "/tes.php", myStr, msg, 50);
 


it doesn't work.

i want to post the parameter to send it through php file.

httpPOST("http:xxx.com", 80, "/tes.php", "", msg, 50);


if i am give the value, its work,
example : httpPOST("http:xxx.com", 80, "/tes.php", "humidity=70&value=60", msg, 50);

but if i want to change the value 70 and 60 to a variable that i get from the sht11, it doesn't work..

please help.
 

milan.rajik said:
I asked you to Zip and post the Arduino sketch and necessary libraries.

https://www.instructables.com/id/PART-1-Send-Arduino-data-to-the-Web-PHP-MySQL-D3js/?ALLSTEPS
Click to expand...

oh ya sorry i forgot to upload the libraries and arduino sketch,

Attached below are the libraries.

and the arduino sketch

Code: 
#include "SIM900.h"
#include <SoftwareSerial.h>
#include "inetGSM.h"
#include <SHT1x.h>

#define dataPin 10
#define clockPin 11

SHT1x sht1x(dataPin, clockPin);

InetGSM inet;
int k = 0;
int j = 0;
char msg[150];
boolean found = false;
char data;
int numdata;
char inSerial[50];
int i = 0;
boolean started = false;

void setup()

{

  Serial.begin(9600);
  Serial.println("Arduino Started");
  /*
  if (gsm.begin(2400)) {
    Serial.println("\nstatus=READY");
    started = true;
  }
  else Serial.println("\nstatus=IDLE");
  if (started) {
    if (inet.attachGPRS("internet", "wap", "wap123"))
      Serial.println("status=ATTACHED");
    else Serial.println("status=ERROR");
    delay(1000);
   
  }
  */
  
};

void loop()
{
  int suhu;
  int temp_c;
  int temp_f;
  int humidity;

  temp_c = sht1x.readTemperatureC();
  temp_f = sht1x.readTemperatureF();
  humidity = sht1x.readHumidity();


 inet.httpPOST("andi.pcr.ac.id", 80, "/tessuhu.php", "cahaya=[COLOR="#FF0000"]1000[/COLOR]&kelembaban=[COLOR="#FF0000"]70[/COLOR]&suhu=[COLOR="#FF0000"]30[/COLOR]", msg, 50);
 serialswread();
  delay(3600000);
};

void serialswread() {
  gsm.SimpleRead();
}

here i want to change the colored red text with the variable temp_c, suhu , and humidity that values from sensor.
 

Attachments

  • GSM-GPRS-GPS-Shield-GSMSHIELDv1.zip
    58.5 KB · Views: 132
Last edited by a moderator:

Attached Project File below:
 

Attachments

  • GSM-GPRS-GPS-Shield-GSMSHIELD.zip
    58.5 KB · Views: 117

The values being passed to httpPOST() is wrong.

Code: 
httpPOST(const char* server, int port, const char* path, const char* parameters, char* result, int resultlength)

See example project and pass arguments according to the function.
 




how to make an arguments with String and then convert to char*?
 

You are passing sting to const char* parameters

You have to see GPRS example sketch and find out what parameters have to be sent. There are const strings.
 

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