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Arduino MySQL Connector Select Query- How to access individual values
Posted by: Patrick LAFFORGUE
Date: January 25, 2015 04:42AM

Hello,

thanks for this helpfull and usefull Arduino MySQL Connector.
I try to command LEDs on an Arduino board from a HTML page using a PHP script and a MySQL Database. I succeed in updating the MySQL Database, reading it with Arduino board and displaying the pin states on the serial monitor. But I didn't succeed in accessing the individual pin state. Where is my mistake ?

Thanks in advance for your help.

Best regards.

Here is the concerned part of the code :

int Pin0, Pin1, Pin2, Pin3, Pin4, Pin5 ;

.......

if (r)
{
rows++;
for (int i = 0; i < num_cols; i++)
{
Serial.print(r->values);

if (i == 0) Pin0 = atoi(r->values[0]) ;
if (i == 1) Pin1 = atoi(r->values[1]) ;
if (i == 2) Pin2 = atoi(r->values[2]) ;
if (i == 3) Pin3 = atoi(r->values[3]) ;
if (i == 4) Pin4 = atoi(r->values[4]) ;
if (i == 5) Pin5 = atoi(r->values[5]) ;
else break ;
}

my_conn.free_row_buffer(); // Free the row buffers
}
} while (r);

Serial.println() ;
Serial.print(rows);
Serial.println(" rows in result");

Serial.println(Pin0);
Serial.println(Pin1);
Serial.println(Pin2);
Serial.println(Pin3);
Serial.println(Pin4);
Serial.println(Pin5);

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Arduino MySQL Connector Select Query- How to access individual values
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