Esp-idf: why is the emission of infrared signals inaccurate after wifi connected in esp32-s2？

help
1

Recently I am learning the Rust language and practicing writing some projects.

I am writing a project that connects wifi on the esp32S2 and then emits an infrared signal to control the air conditioner.

I use the template of esp-idf and use the function to connect wifi, it works and connected wifi successfully. Then I write a function to emits infrared signal, it also works and the air conditioner can be controlled. But when I emits infrared signal after wifi connected, it does not work.

Below is the function to emit infrared signal, I use LedcDriver and thread::sleep.

const K_GREE_HDR_MARK: u64 = 9000;
const K_GREE_HDR_SPACE: u64 = 4500;
const K_GREE_MSG_SPACE: u64 = 20_000;
const K_GREE_BIT_MARK: u64 = 656;
const K_GREE_ONE_SPACE: u64 = 1640;
const K_GREE_ZERO_SPACE: u64 = 544;

pub struct IrPwm<'d> {
    driver: LedcDriver<'d>,
}

impl<'d> IrPwm<'d> {
    pub fn new<C: LedcChannel, T: LedcTimer>(
        _timer: impl Peripheral<P = T> + 'd,
        _channel: impl Peripheral<P = C> + 'd,
        pin: impl Peripheral<P = impl OutputPin> + 'd,
    ) -> Result<Self, EspError> {
        let timer_driver =
            LedcTimerDriver::new(_timer, &TimerConfig::default().frequency(38.kHz().into()))?;
        let mut driver = LedcDriver::new(_channel, timer_driver, pin)?;
        let max_duty = driver.get_max_duty();
        driver.set_duty(max_duty / 3)?;
        driver.disable();

        Ok(Self { driver })
    }

    pub fn send(&mut self, data_code: u128) {
        let bytes = data_code.to_be_bytes();

        let temp: String = bytes.iter().map(|byte| format!("{:08b}", byte)).collect();
        let (data_code1, data_code2) = (&temp[0..35], &temp[35..67]);

        println!("{}, {}", data_code1, data_code2);
        self.driver.enable();
        thread::sleep(Duration::from_micros(K_GREE_HDR_MARK));
        self.no_send_ir(K_GREE_HDR_SPACE);

        for i in data_code1.bytes() {
            if i == b'0' {
                self.send_ir_zero();
            } else {
                self.send_ir_one();
            }
        }

        self.send_ir_zero();
        self.no_send_ir(K_GREE_MSG_SPACE);
        for i in data_code2.bytes() {
            if i == b'0' {
                self.send_ir_zero();
            } else {
                self.send_ir_one();
            }
        }

        self.send_ir_zero();
    }

    fn no_send_ir(&mut self, t: u64) {
        self.driver.disable();
        thread::sleep(Duration::from_micros(t));
    }

    fn send_ir(&mut self, e_t: u64, d_t: u64) {
        self.driver.enable();
        thread::sleep(Duration::from_micros(e_t));
        self.driver.disable();
        thread::sleep(Duration::from_micros(d_t));
    }

    // 发送二进制数据 1
    fn send_ir_one(&mut self) {
        self.send_ir(K_GREE_BIT_MARK, K_GREE_ONE_SPACE);
    }

    // 发送二进制数据 0
    fn send_ir_zero(&mut self) {
        self.send_ir(K_GREE_BIT_MARK, K_GREE_ZERO_SPACE);
    }
}

I do not know the reason why it happened, I need your help!