[SOLVED] Slider sending value (on release) 2 times

Solved
1

Hello,

I’m trying to read slider value on serial monitor when slider position is changed (widget is configured to send value on release). For some reason, I’m getting duplicated entries. I tried also other option (to send value constantnly, and in that case there are no duplicated values during sliding, but when I release last value is also duplicated. :slight_smile:

Slider is configured as virtual port V0. My code:

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

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

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "xxx";
char pass[] = "xxx";

void setup()
{
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
}

BLYNK_WRITE(V0)
{
  int pinValue = param.asInt(); // assigning incoming value from pin V0 to a variable
  Serial.print("V0 Slider value is: ");
  Serial.println(pinValue);
  
}


void loop()
{
  Blynk.run();
}

Reading from serial monitor when I change slider position few times:

[16502] Connecting to AndroidAP
[34698] Connected to WiFi
[34698] IP: 192.168.43.228
[34698] Blynk v0.3.9 on ESP-12
[34698] Connecting to blynk-cloud.com:8442
[34878] Ready (ping: 6ms).
V0 Slider value is: 382
V0 Slider value is: 382
V0 Slider value is: 669
V0 Slider value is: 669
V0 Slider value is: 287
V0 Slider value is: 287
V0 Slider value is: 671
V0 Slider value is: 671
V0 Slider value is: 203
V0 Slider value is: 203
V0 Slider value is: 803
V0 Slider value is: 803
V0 Slider value is: 532
V0 Slider value is: 532

I’m experimenting right now, but I’m planing to triger some functions which would have slider value as parameter, but I don’t want to execute function 2 times. Am I doing something wrong? Thanks in advance.

2

I have also seen this behavior in my code for my cloud lamp posted on here. It’s not a concern for that project, but I could see how it could affect other projects. I just wanted to say you aren’t the only one that has seen this occur.

3

Yep, such issue is possible, we’ll fix it till the next release

4

yeah - happening for me too :slight_smile:

just means double the amount of serial prints and function executions for me, and occasional flooding, but i get around this…

be v.nice to have a fix though :smiley:

ps - see why i get flooding with my slider:

{
  modeSelect = param.asInt(); // manual mode ON
  if (modeSelect == 1)
  {
#ifdef debug
    Serial.println(F("############# - System = modeSelect slider set to '1' = 'MANUAL'"));
    Serial.println(F("------------"));
#endif
    digitalWrite(livingVent, LOW);
    digitalWrite(bedroomsVent, LOW);
    digitalWrite(roofVent, LOW);
    digitalWrite(houseVent, LOW);
    digitalWrite(externVent, LOW);
    digitalWrite(upstairsFan, HIGH); //high is OFF for the fan
    Blynk.virtualWrite(8, 0); // BED LED on Blynk app
    Blynk.virtualWrite(10, 0); // LVR LED on Blynk app
    Blynk.virtualWrite(5, 0); //rof LED on Blynk app
    Blynk.virtualWrite(4, 0); //hse LED on Blynk app
    Blynk.virtualWrite(6, 0); //ext LED on Blynk app
    Blynk.virtualWrite(27, 1023); //nil LED on Blynk app
    Blynk.virtualWrite(28, 0); //fan LED on Blynk app
    Blynk.virtualWrite(0, 0); // ERR LED on Blynk app
    Blynk.virtualWrite(20, 0); //living error on Blynk app
    Blynk.virtualWrite(21, 0); //beds error on Blynk app
    Blynk.virtualWrite(41, 0); //Bedrooms outlet button LED on Blynk app
    Blynk.virtualWrite(91, 0); //living outlet button LED on Blynk app
    fanCheck();
#ifdef debug
    Serial.println(F("System = modeSelect MANUAL mode, everything off, select inlet/outlet/fan!"));
    Serial.println(F("------------"));
#endif
  }
  else if (modeSelect == 2)
  {
#ifdef debug
    Serial.println(F("############# - System = modeSelect set to 'AUTO'"));
    Serial.println(F("------------"));
#endif
    digitalWrite(livingVent, LOW);
    digitalWrite(bedroomsVent, LOW);
    digitalWrite(roofVent, LOW);
    digitalWrite(houseVent, LOW);
    digitalWrite(externVent, LOW);
    digitalWrite(upstairsFan, HIGH); //high is OFF for the fan
    Blynk.virtualWrite(8, 0); // BED LED on Blynk app
    Blynk.virtualWrite(10, 0); // LVR LED on Blynk app
    Blynk.virtualWrite(5, 0); //rof LED on Blynk app
    Blynk.virtualWrite(4, 0); //hse LED on Blynk app
    Blynk.virtualWrite(6, 0); //ext LED on Blynk app
    Blynk.virtualWrite(27, 1023); //nil LED on Blynk app
    Blynk.virtualWrite(28, 0); //fan LED on Blynk app
    Blynk.virtualWrite(0, 0); // ERR LED on Blynk app
    Blynk.virtualWrite(20, 0); //living error on Blynk app
    Blynk.virtualWrite(21, 0); //beds error on Blynk app
    Blynk.virtualWrite(41, 0); //Bedrooms outlet button LED on Blynk app
    Blynk.virtualWrite(91, 0); //living outlet button LED on Blynk app
    dewPointUplift = 0.30;
    fanCheck();
    chooseInlet();
  }
  else if (modeSelect == 3)
  {
#ifdef debug
    Serial.println(F("############# - System = modeSelect set to 'AUTO-DP'")); // this is auto with ignore dew point
    Serial.println(F("------------"));
#endif
    digitalWrite(livingVent, LOW);
    digitalWrite(bedroomsVent, LOW);
    digitalWrite(roofVent, LOW);
    digitalWrite(houseVent, LOW);
    digitalWrite(externVent, LOW);
    digitalWrite(upstairsFan, HIGH); //high is OFF for the fan
    Blynk.virtualWrite(8, 0); // BED LED on Blynk app
    Blynk.virtualWrite(10, 0); // LVR LED on Blynk app
    Blynk.virtualWrite(5, 0); //rof LED on Blynk app
    Blynk.virtualWrite(4, 0); //hse LED on Blynk app
    Blynk.virtualWrite(6, 0); //ext LED on Blynk app
    Blynk.virtualWrite(27, 1023); //nil LED on Blynk app
    Blynk.virtualWrite(28, 0); //fan LED on Blynk app
    Blynk.virtualWrite(0, 0); // ERR LED on Blynk app
    Blynk.virtualWrite(20, 0); //living error on Blynk app
    Blynk.virtualWrite(21, 0); //beds error on Blynk app
    Blynk.virtualWrite(41, 0); //Bedrooms outlet button LED on Blynk app
    Blynk.virtualWrite(91, 0); //living outlet button LED on Blynk app
    dewPointUplift = 1;//this means ignore dew point uplift
    fanCheck();
    chooseInlet();
  }
}
5

Hi all, please check the latest update on Google Play - it contains a fix to this issue

1 Like
6

Thanks. Just updated app and problem with duplicated values is fixed now :wink: but I noticed that there is no value preview during sliding. First I must release the slider and then I actually realize what value I choose. I don’t know did I explaned ok. :slight_smile: Thanks for quick support. :slight_smile:

7

Yep, it is a bug, will fix it today under the same version.

1 Like
8

Everything works perfect now. Thanks again. :slight_smile:

9

I thought I was seeing things when the slider was not showing movement when I was making changes.
Uninstalled Blynk and reinstalled and now works.

Denny

10

5 posts were split to a new topic: Change of the slider sends the value double with a BLYNK_WRITE(V35) command

11