pub fn send<'s>(
        &'s mut self,
        dst_addr: &[u8; 6],
        data: &[u8],
    ) -> Result<SendWaiter<'s>, EspNowError> {
        ESP_NOW_SEND_CB_INVOKED.store(false, Ordering::Release);
        check_error!({ esp_now_send(dst_addr.as_ptr(), data.as_ptr(), data.len()) })?;
        Ok(SendWaiter(PhantomData))
    }
Send data to peer

The peer needs to be added to the peer list first.
esp-wifi/src/esp_now/mod.rs