Widget led

Solved
1

Hello, please help with arduino 101 (connect with usb). I have a project, the code is attached below. When the temperature or the gas sensor is raised, a light is activated on my circuit. How to make it so that the application on the android also turned on and off the light bulb. I can not do it at all.

#define GAS A0
#define TEMP A1 

// You could use a spare Hardware Serial on boards that have it (like Mega)
#include <SoftwareSerial.h>
SoftwareSerial SwSerial(10, 11); // RX, TX

#include <BlynkSimpleStream.h>

char auth[] = "46ac3f79b916492cab3a9ef85a3f4f33";
WidgetLED led1(V1);
int LED_GAS = 12; 
int LED_TEMP = 11; 

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

  // Blynk will work through Serial
  // Do not read or write this serial manually in your sketch
  Blynk.begin(Serial, auth);
 
  pinMode(TEMP, INPUT);
  pinMode(GAS, INPUT);
  pinMode(LED_GAS,OUTPUT);
  pinMode(LED_TEMP,OUTPUT);
}

void loop()
{
  Blynk.run();
  gas();
  temp(); 
}
void gas()
{
  float GAS0 = analogRead(GAS);
  int result_gas = GAS0;
  delay(50);
  Serial.print("Gas ratio: ");
  Serial.print(GAS0);
  if (result_gas >= 30) 
  {
    led1.on();
    tone(10, 3000, 25);
    digitalWrite(LED_GAS,LOW);
    delay(25);
    digitalWrite(LED_GAS,HIGH);
  }
  else
  {
    digitalWrite(LED_GAS,LOW);
    noTone(10);
  }
}

void temp()
{
  float t = analogRead(TEMP);
  int result_t = t;
  Serial.print("Temp: ");
  Serial.print(result_t);
  delay(50);
  if (t >= 750) 
  {
    tone(10, 1000, 25);
    digitalWrite(LED_TEMP,LOW);
    delay(25);
    digitalWrite(LED_TEMP,HIGH);
  } 
  else 
  {
    digitalWrite(LED_TEMP,LOW); 
    noTone(10);
  }
}
2

so do I understand it correctly:
IF the gas or temp physical LED (on board) is activated THEN you also want a virtual LED (blynk app) activated??

3

Yes.

4

z.B
WidgetLED led0(V1);
WidgetLED led2(V2);

that comes in your program void gas void temp led0.on ();
led2.off (); or led0.off ();
led2.on ();

5

@tu_4ka Virtual LEDs can be controlled in two ways…

As noted above… with led2.on() or led2.off() commands.

Or, as you are doing, with virtualWrite()… However, then they accept a PWM like range of 0-255. So setting it HIGH is actually only giving it a 1, which is interpreted as just a tiny step above totally OFF… so use 0 instead of LOW and 255 instead of HIGH… anything in between will change the apparent “intensity” of the vLED

6

Thank you very much. And could you still prompt after which line to insert WidgetLED led0 (V1);
WidgetLED led2 (V2);
I after what in void gas led0.on (); led2.off ();

7

Hello
Widget LED led0 (V1); Widget LED led2 (V2); under char auth [] = “46ac3f79b916492cab3a9ef85a3f4f33”; insert
for example in the sketch at void temp after if led0.on (); or led2.off (); and after else led0.on (); or
led2.off (); insert so have pointed and then still with blynk app the LED select and then still the LED color

8

Thank you, very much.

9

hi tu_4ka can u share your code here as a references for me cause i also having the same problem with activate the led widget in blynk app, thanks

10

@Oh_Jia_Ming you seem to be taking a scattergun approach to asking for help with your university project. @PhilipNgu also appears to have the same project (not surprising as you both attend the same university).

Blynk regulars tend to get a little tired of students wanting free programming lessons, especially when you haven’t spent much time researching or taking onboard advice that’s given.

Pete.

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