Graph refresh rate

Hello,

Have started to create my first project: UNO - W5100 - MAX6675 (temperature sensor).
I am bit exploring what is the best view for a BBQ temperature reading.

I have set on my tablet a value with a reading frequency of 3 seconds and a graph with a reading frequency of 30 seconds.
My loop delay on the UNO is 3 seconds

My question: why is a bar added in the graph in a faster frequency than 30 seconds?
Can I invluence this?
I also like the historical graph but want to cover the last 3 minutes.

Hi, thanks for your response. Everything is working perfectly, but I expected that setting graph frequency to 30 seconds I get 1 bar each 30 seconds. (I realize this is getting close to the historical graph). I saw the BLYNCK_READ remark in the help function but was not sure how to use this. Below my code:
(also manage to read forum instructions around publishing code)

``````
/*
//https://github.com/mcleng/MAX6675-Library
//http://datasheets.maximintegrated.com/en/ds/MAX6675.pdf
*/
#define BLYNK_PRINT Serial    // Comment this out to disable prints and save space
#include <SPI.h>
#include <Ethernet.h>
#include <BlynkSimpleEthernet.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "xxx";

#define W5100_CS  10
#define SDCARD_CS 4

#include <MAX6675.h>
// left_2_right: GND - VCC - SCK - CS - SO
//int LED1 = 9;           // Status LED Pin
int CS = 5;               // CS pin on MAX6675
int SO = 6;               // SO pin of MAX6675
int NCK = 4;              // SCK pin of MAX6675 (variable SCK cannot be used reserved for RTC)
int units = 1;            // Units to readout temp (0 = raw, 1 = ËšC, 2 = ËšF)
float temperature = 0.0;  // Temperature output variable
int t;
// Initialize the MAX6675 Library for our chip
MAX6675 temp(CS,SO,NCK,units);
// Setup Serial output and LED Pin
// MAX6675 Library already sets pin modes for MAX6675 chip!

void setup() {
Serial.begin(9600);
//pinMode(LED1, OUTPUT);
pinMode(SDCARD_CS, OUTPUT);
digitalWrite(SDCARD_CS, HIGH); // Deselect the SD card

Blynk.begin(auth);
// You can also specify server.
// For more options, see BoardsAndShields/Arduino_Ethernet_Manual example
//Blynk.begin(auth, "your_server.com", 8442);
}

void loop()
{
Blynk.run();

// Read the temp from the MAX6675