Sending a temperature to blynk 2

Solved
1

Hi

I am having an issue sending a temperature (e.g. 15.5 ) to Blynk 2

I have set my Virtual data as decimal in Blynk.Console and then when I do a virtualWrite “Blynk.virtualWrite(V10,myValue)” and send the data as a float or int I get a zero in my Widgit (tried using Valued Label, Labeled value and also a Guage.)

I can get the data to display if I change the type to String in the virtual pin in the Console bit that seems wrong as I get no formatting etc… Am I doing something wrong?

Any help would be much appreciated

Ants

2

Set the datastream in the Web console to double.

3

Sorry my mistake - I said decimal in my initial msg but I should have typed “double” as decimal is not even an option. Any way it is set as double and still doesn’t work.

Thanks

4

Can you show me how did you configure your datastream please ?
And show me your sketch please.

5 
#define BLYNK_TEMPLATE_ID "TMPLdw_jZT3W"
#define BLYNK_DEVICE_NAME "Map Data"
#define BLYNK_FIRMWARE_VERSION "0.1.0"
#define BLYNK_PRINT Serial

#define ONBOARD_LED 2
#include <BlynkEdgent.h>

bool ledToggle ;
float temperatureMin;
void setup() 
{
  Serial.begin(115200);
  pinMode(ONBOARD_LED,OUTPUT); 
  BlynkEdgent.begin();
  timer.setInterval(2000L,blynkTimerEvent);
}

void loop() 
{
    BlynkEdgent.run();    
    timer.run();
}

void blynkTimerEvent()
{ 
  float temperatureMin = 12.4;
  ledToggle = !ledToggle;
  digitalWrite(ONBOARD_LED,ledToggle);
  Blynk.virtualWrite(V8,ledToggle);  // prove that data is getting to blynk 
  Blynk.virtualWrite(V10,temperatureMin);
}
6

Capture
Capture817×792 35.4 KB

7

Your MAX value is 0 (zero) of datastream V10, change it to 100 (or higher)

8

That fixed it thankyou! Do you think I should add a request for a new feature that this should be mandatory.

9

No because it’s obvious, any blynk user knows that there must be min and max values, for example when you create a switch you have to put 0 and 1 or else it’s not gonna work.

10

@Ants default max value for DS is 1, so looks like you changed it to 0.