[arduino code examples for AIO Hybrid]-05 IR send

Code:
/*

 * Copyright (c) 2025 KinCony IoT

 * https://www.kincony.com

 *

 * Description:

 * This program generates a 38 kHz PWM signal on a specified GPIO pin

 * using the ESP32-S3 LEDC hardware peripheral.

 * The output can be used to drive an IR LED for infrared signal transmission.

 */



#include <Arduino.h>

#include "driver/ledc.h"



#define IR_SEND_PIN 14  // GPIO pin connected to the IR LED



void setup() {

  Serial.begin(115200);



  // Configure the LEDC timer

  ledc_timer_config_t ledc_timer = {

      .speed_mode = LEDC_LOW_SPEED_MODE,       // Use low-speed mode

      .duty_resolution = LEDC_TIMER_8_BIT,     // 8-bit resolution (0-255)

      .timer_num = LEDC_TIMER_0,               // Select timer 0

      .freq_hz = 38000,                        // Set frequency to 38 kHz

      .clk_cfg = LEDC_AUTO_CLK                 // Automatically select the clock source

  };

  ledc_timer_config(&ledc_timer);



  // Configure the LEDC channel

  ledc_channel_config_t ledc_channel = {

      .gpio_num = IR_SEND_PIN,                 // Output GPIO pin

      .speed_mode = LEDC_LOW_SPEED_MODE,       // Use low-speed mode

      .channel = LEDC_CHANNEL_0,               // Channel 0

      .intr_type = LEDC_INTR_DISABLE,          // Disable interrupts

      .timer_sel = LEDC_TIMER_0,                // Use timer 0

      .duty = 128,                             // 50% duty cycle (128/255)

      .hpoint = 0                              // Start at high point 0

  };

  ledc_channel_config(&ledc_channel);



  Serial.println("38kHz PWM started.");

}



void loop() {

  // Continuously output the carrier wave

}