2 minutes
Power on a PC when a button is pushed on an ESP32 using Rust
Prerequisites
[dependencies]
log = "0.4"
anyhow = "1"
embedded-svc = { version = "0.28", default-features = false }
esp-idf-svc = { version = "0.51", features = ["critical-section", "embassy-time-driver", "embassy-sync"] }
esp-idf-hal = "0.45.2"
Code
Now update main.rs
and add this code:
use core::convert::TryInto;
use embedded_svc::wifi::{AuthMethod, ClientConfiguration, Configuration};
//use esp_idf_svc::hal::prelude::Peripherals;
use esp_idf_svc::log::EspLogger;
use esp_idf_svc::wifi::{BlockingWifi, EspWifi};
use esp_idf_svc::{eventloop::EspSystemEventLoop, nvs::EspDefaultNvsPartition};
use log::info;
use std::net::{UdpSocket, Ipv4Addr, SocketAddrV4};
use std::time::Duration;
use esp_idf_hal::delay::FreeRtos;
use esp_idf_hal::gpio::PinDriver;
use esp_idf_hal::peripherals::Peripherals;
const SSID: &str = "...";
const PASSWORD: &str = "...";
fn main() -> anyhow::Result<()> {
esp_idf_svc::sys::link_patches();
EspLogger::initialize_default();
let peripherals = Peripherals::take()?;
let sys_loop = EspSystemEventLoop::take()?;
let nvs = EspDefaultNvsPartition::take()?;
let mut wifi = BlockingWifi::wrap(
EspWifi::new(peripherals.modem, sys_loop.clone(), Some(nvs))?,
sys_loop,
)?;
connect_wifi(&mut wifi)?;
let ip_info = wifi.wifi().sta_netif().get_ip_info()?;
info!("Wifi DHCP info: {:?}", ip_info);
//let peripherals = Peripherals::take().unwrap();
let pins = peripherals.pins;
let mut led = PinDriver::output(pins.gpio2).unwrap();
let button = PinDriver::input(pins.gpio35).unwrap();
let mac: [u8; 6] = [0x94, 0xC6, 0x91, 0xAD, 0x1D, 0x49];
loop {
if button.is_high() {
log::info!("Switch ON");
led.set_high().unwrap(); // Switch ON LED
send_wol(&mac);
} else {
log::info!("Switch OFF");
led.set_low().unwrap(); // Switch OFF LED
}
FreeRtos::delay_ms(1000u32);
}
//info!("Shutting down in 5s...");
//std:đ§”:sleep(core::time::Duration::from_secs(5));
//Ok(())
}
fn connect_wifi(wifi: &mut BlockingWifi<EspWifi<'static>>) -> anyhow::Result<()> {
let wifi_configuration: Configuration = Configuration::Client(ClientConfiguration {
ssid: SSID.try_into().unwrap(),
bssid: None,
auth_method: AuthMethod::WPA2Personal,
password: PASSWORD.try_into().unwrap(),
channel: None,
..Default::default()
});
wifi.set_configuration(&wifi_configuration)?;
wifi.start()?;
info!("Wifi started");
wifi.connect()?;
info!("Wifi connected");
wifi.wait_netif_up()?;
info!("Wifi netif up");
//94:c6:91:ad:1d:49
// L'adresse de diffusion du réseau local
//let broadcast_ip = "255.255.255.255"; // Adresse de diffusion
// Envoi du WOL
//send_wol(&mac, broadcast_ip);
Ok(())
}
fn send_wol(mac: &[u8; 6]) {
//fn send_wol(mac: &[u8; 6], broadcast_ip: &str) {
// Construction du paquet Magic Packet
info!("Sending WOL request on the LAN");
let mut packet: Vec<u8> = vec![0xFF; 6]; // 6 octets Ă 0xFF
packet.extend_from_slice(&mac.repeat(16)); // Répéter le MAC address 16 fois
// Créer une socket UDP
let socket = UdpSocket::bind("0.0.0.0:0").expect("Impossible de lier la socket");
socket.set_read_timeout(Some(Duration::from_secs(2))).unwrap();
// Adresse de diffusion du réseau local
let addr = SocketAddrV4::new(Ipv4Addr::new(255, 255, 255, 255), 9); // Port 9 est souvent utilisé pour WOL
// Envoyer le paquet
socket
.send_to(&packet, addr)
.expect("Ăchec de l'envoi du paquet WOL");
info!("Wake-on-LAN envoyé au MAC: {:02x}:{:02x}:{:02x}:{:02x}:{:02x}:{:02x}", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
}
Build and Run
cargo build
espflash flash target/xtensa-esp32-espidf/debug/blink --monitor