Led dimming on Esp32 devkit

Solved
1

Hello all!

I am trying to control the brightness of builtin led on Esp32 devkit, by Google assistant commands say " set led brightness to 50%". I am able to switch ON/Off the led but having trouble with webhooks to control the brightness. What parameters to be used while creating applet?

I have searched a lot but no result.

2

What have you tried so far, and what code are you using on your ESP32?

Pete.

3

Hello Pete,

Please find below the example used from Blynk Arduino library.

  1. With the basic example code and creating applets i was able to turn on and off led by voice command.
  2. i added some lines to work with Slider widget in Blynk app, it worked as desired.

I wanted to control the brightness by voice command on google assistant which is where i am getting stuck. I am not much into coding so not sure where i am wrong. Is it the program code or the applet parameters…please assist.

Thankyou,
Minesh

#define BLYNK_PRINT Serial


#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "FMC8WkLghPgIxw0RTHpImlTrXCi7aIgN";

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "MAURYA";
char pass[] = "8767510562@aalok";
int led = 2;
int pinValue;

BLYNK_WRITE(V0)
{
  pinValue = param.asInt(); // assigning incoming value from pin V1 to a variable
  ledcWrite(0, pinValue);
  // process received value
}

void setup()
{
  // Debug console
  ledcSetup(0, 12000 ,8);
  // attach the channel to the GPIO to be controlled
  ledcAttachPin(led, 0);
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
}

void loop()
{
  Blynk.run();
}
4

I suspect you are using IFTTT.
Use the google assistant trigger (THIS), use “phrase with a number”.
For the action (THAT) use webhook. Use the URL in the format shown below. number field is selected from the insert ingredients option.

http://blynk-cloud.com/Auth_Token/update/V0?value=numberfield

083337_IFTTT
083337_IFTTT1071×2025 176 KB

5

Thanks a ton! It is working now :relaxed: I was using just " http://blynk-cloud.com/Auth_Token/update/V0 "

Regards,
Minesh