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//! This example uses the RP Pico W board Wifi chip (cyw43).
//! Connects to Wifi network and makes a web request to get the current time.
#![no_std]
#![no_main]
#![allow(async_fn_in_trait)]
use core::str::from_utf8;
use cyw43::JoinOptions;
use cyw43_pio::{PioSpi, DEFAULT_CLOCK_DIVIDER};
use defmt::*;
use embassy_executor::Spawner;
use embassy_net::dns::DnsSocket;
use embassy_net::tcp::client::{TcpClient, TcpClientState};
use embassy_net::{Config, StackResources};
use embassy_rp::bind_interrupts;
use embassy_rp::clocks::RoscRng;
use embassy_rp::gpio::{Level, Output};
use embassy_rp::peripherals::{DMA_CH0, PIO0};
use embassy_rp::pio::{InterruptHandler, Pio};
use embassy_time::{Duration, Timer};
use reqwless::client::{HttpClient, TlsConfig, TlsVerify};
use reqwless::request::Method;
use serde::Deserialize;
use static_cell::StaticCell;
use {defmt_rtt as _, panic_probe as _, serde_json_core};
bind_interrupts!(struct Irqs {
PIO0_IRQ_0 => InterruptHandler<PIO0>;
});
const WIFI_NETWORK: &str = "ssid"; // change to your network SSID
const WIFI_PASSWORD: &str = "pwd"; // change to your network password
#[embassy_executor::task]
async fn cyw43_task(runner: cyw43::Runner<'static, Output<'static>, PioSpi<'static, PIO0, 0, DMA_CH0>>) -> ! {
runner.run().await
}
#[embassy_executor::task]
async fn net_task(mut runner: embassy_net::Runner<'static, cyw43::NetDriver<'static>>) -> ! {
runner.run().await
}
#[embassy_executor::main]
async fn main(spawner: Spawner) {
info!("Hello World!");
let p = embassy_rp::init(Default::default());
let mut rng = RoscRng;
let fw = include_bytes!("../../../../cyw43-firmware/43439A0.bin");
let clm = include_bytes!("../../../../cyw43-firmware/43439A0_clm.bin");
// To make flashing faster for development, you may want to flash the firmwares independently
// at hardcoded addresses, instead of baking them into the program with `include_bytes!`:
// probe-rs download 43439A0.bin --binary-format bin --chip RP2040 --base-address 0x10100000
// probe-rs download 43439A0_clm.bin --binary-format bin --chip RP2040 --base-address 0x10140000
// let fw = unsafe { core::slice::from_raw_parts(0x10100000 as *const u8, 230321) };
// let clm = unsafe { core::slice::from_raw_parts(0x10140000 as *const u8, 4752) };
let pwr = Output::new(p.PIN_23, Level::Low);
let cs = Output::new(p.PIN_25, Level::High);
let mut pio = Pio::new(p.PIO0, Irqs);
let spi = PioSpi::new(
&mut pio.common,
pio.sm0,
DEFAULT_CLOCK_DIVIDER,
pio.irq0,
cs,
p.PIN_24,
p.PIN_29,
p.DMA_CH0,
);
static STATE: StaticCell<cyw43::State> = StaticCell::new();
let state = STATE.init(cyw43::State::new());
let (net_device, mut control, runner) = cyw43::new(state, pwr, spi, fw).await;
unwrap!(spawner.spawn(cyw43_task(runner)));
control.init(clm).await;
control
.set_power_management(cyw43::PowerManagementMode::PowerSave)
.await;
let config = Config::dhcpv4(Default::default());
// Use static IP configuration instead of DHCP
//let config = embassy_net::Config::ipv4_static(embassy_net::StaticConfigV4 {
// address: Ipv4Cidr::new(Ipv4Address::new(192, 168, 69, 2), 24),
// dns_servers: Vec::new(),
// gateway: Some(Ipv4Address::new(192, 168, 69, 1)),
//});
// Generate random seed
let seed = rng.next_u64();
// Init network stack
static RESOURCES: StaticCell<StackResources<5>> = StaticCell::new();
let (stack, runner) = embassy_net::new(net_device, config, RESOURCES.init(StackResources::new()), seed);
unwrap!(spawner.spawn(net_task(runner)));
while let Err(err) = control
.join(WIFI_NETWORK, JoinOptions::new(WIFI_PASSWORD.as_bytes()))
.await
{
info!("join failed with status={}", err.status);
}
info!("waiting for link...");
stack.wait_link_up().await;
info!("waiting for DHCP...");
stack.wait_config_up().await;
// And now we can use it!
info!("Stack is up!");
// And now we can use it!
loop {
let mut rx_buffer = [0; 8192];
let mut tls_read_buffer = [0; 16640];
let mut tls_write_buffer = [0; 16640];
let client_state = TcpClientState::<1, 1024, 1024>::new();
let tcp_client = TcpClient::new(stack, &client_state);
let dns_client = DnsSocket::new(stack);
let tls_config = TlsConfig::new(seed, &mut tls_read_buffer, &mut tls_write_buffer, TlsVerify::None);
let mut http_client = HttpClient::new_with_tls(&tcp_client, &dns_client, tls_config);
let url = "https://worldtimeapi.org/api/timezone/Europe/Berlin";
// for non-TLS requests, use this instead:
// let mut http_client = HttpClient::new(&tcp_client, &dns_client);
// let url = "http://worldtimeapi.org/api/timezone/Europe/Berlin";
info!("connecting to {}", &url);
let mut request = match http_client.request(Method::GET, &url).await {
Ok(req) => req,
Err(e) => {
error!("Failed to make HTTP request: {:?}", e);
return; // handle the error
}
};
let response = match request.send(&mut rx_buffer).await {
Ok(resp) => resp,
Err(_e) => {
error!("Failed to send HTTP request");
return; // handle the error;
}
};
let body = match from_utf8(response.body().read_to_end().await.unwrap()) {
Ok(b) => b,
Err(_e) => {
error!("Failed to read response body");
return; // handle the error
}
};
info!("Response body: {:?}", &body);
// parse the response body and update the RTC
#[derive(Deserialize)]
struct ApiResponse<'a> {
datetime: &'a str,
// other fields as needed
}
let bytes = body.as_bytes();
match serde_json_core::de::from_slice::<ApiResponse>(bytes) {
Ok((output, _used)) => {
info!("Datetime: {:?}", output.datetime);
}
Err(_e) => {
error!("Failed to parse response body");
return; // handle the error
}
}
Timer::after(Duration::from_secs(5)).await;
}
}
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