Works randomly , nearly not work

[gaochuntie]

The on and off for the 30 led strings just work some time,for most of the time,it didn't work and gives no error .
In other words,it only works if the leds is just connect to the rpi.
fn main() {
let mut controller = init_controller();
warm_light_off(&mut controller);
let listener = TcpListener::bind("127.0.0.1:8891").unwrap();

loop {
    println!("Waiting for client to connect");
    match listener.accept() {
        Ok((stream, _)) => {
            handle_client(stream, &mut controller);
        }
        Err(e) => {
            eprintln!("Unable to connect: {}", e);
        }
    }

}

}
fn handle_client(mut stream: TcpStream, controller: &mut Controller) {
println!("Client connected");
let mut buffer = [0; 512];
match stream.read(&mut buffer) {
Ok(size) => {
let msg = String::from_utf8_lossy(&buffer[..size]);
let msg = msg.trim_end_matches(|c| c == '\n' || c == '\r');
println!("Received: {}", msg);
match msg {
"on" => warm_light_on(controller),
"off" => warm_light_off(controller),
_ => {
eprintln!("Unknown command: [{}]", msg);
}
}
}
Err(e) => {
eprintln!("Failed to receive data: {}", e);
}
}
}

fn init_controller() -> Controller {
ControllerBuilder::new()
.freq(800_000)
.dma(10)
.channel(
0, // Channel Index
ChannelBuilder::new()
.pin(10) // GPIO 10 = SPI0 MOSI
.count(30) // Number of LEDs
.strip_type(StripType::Ws2812)
.brightness(255) // default: 255
.build(),
)
.build()
.unwrap()
}

fn warm_light_on(controller: &mut Controller) {
let leds = controller.leds_mut(0);

for led in leds {
    //LBRB
    //(255, 230, 150)
    *led = [255, 230, 150, 0];
}
if let Err(e) = controller.render() {
    eprintln!("Failed to render: {}", e);
}
controller.wait().unwrap();
println!("Warm light on");

}

fn warm_light_off(controller: &mut Controller) {
let leds = controller.leds_mut(0);
for led in leds {
*led = [0, 0, 0, 0];
}
if let Err(e) = controller.render() {
eprintln!("Failed to render: {}", e);
}
controller.wait().unwrap();
println!("Warm light off");
}