Problems with using incoming values from pin V1 inside loop function

Solved
1

Hi Blynkers,

I need some help with my project. I’ve been trying to run the following program on my Arduino Uno with a HM-10 bluetooth module. The problem is that: “Serial.println(Slider)” stays zero in serial monitor when i move the slider on the app side. The programs runs perfect when i use ethernet connection instead of bluetooth. Can anybody tell me please how to solve this without placing the “Serial.println(Slider)” outside the void loop function? Thank you!

#define BLYNK_PRINT Serial

#include <SoftwareSerial.h>
SoftwareSerial SwSerial(12, 13); // RX, TX
   
#include <BlynkSimpleSerialBLE.h>
#include <SoftwareSerial.h>
int Slider;

char auth[] = "secret";

SoftwareSerial SerialBLE(12, 13); // RX, TX

// This function will be called every time Slider Widget
// in Blynk app writes values to the Virtual Pin 1
BLYNK_WRITE(V1)
{
 int Slider = param.asInt(); // assigning incoming value from pin V1 to a variable 
}

void setup()
{
 // Debug console
 Serial.begin(9600);

 SerialBLE.begin(9600);
 Blynk.begin(SerialBLE, auth);
 Serial.println("Waiting for connections...");
}

void loop()
{
 Serial.println(Slider);
 Blynk.run(); 
}
2

Honestly… I think BT/BLE has some comparatively recent issues that are still being worked on. Others have commented recently about similar problems but nothing official, that I can recall, is being said about any issue acknowledgement or fixes.

3

You already declared this variable Slider as global, so remove the int from within the function

Besides… what are you intending to do with the variable Slider after getting it?? I don’t see any other usages in your code (aside from the nasty inclusion in the void loop())

4

You have also doubled up your SoftwareSerial designation :stuck_out_tongue:

5

I removed the int from within the function. It finally works! Thanks a lot!!

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