diff --git a/src/beep.rs b/src/beep.rs
index 74e2161..3a47022 100644
--- a/src/beep.rs
+++ b/src/beep.rs
@@ -12,23 +12,26 @@ pub struct Beep<P: OutputPin, T: ledc::HwTimer, C: ledc::HwChannel> {
     beat: u8,
     ringtone: ringtone::Type,
     channel: LedcChannel<P, T, C>,
+    duty: u32,
 }
 
 impl<P: OutputPin, T: ledc::HwTimer, C: ledc::HwChannel> Beep<P, T, C> {
     pub fn new(pin: P, timer: T, channel: C) -> Result<Self, EspError> {
+        let channel = Self::init_channel(pin, timer, channel)?;
+
+        let max_duty = channel.get_max_duty();
         return Ok(Beep {
-            channel: Self::init_channel(pin, timer, channel)?,
+            channel,
             beat: 0,
+            duty: max_duty * 3 / 4,
             ringtone: ringtone::SILENCE,
         });
     }
 
     fn init_channel(pin: P, timer: T, channel: C) -> Result<LedcChannel<P, T, C>, EspError> {
-        let config = TimerConfig::default().frequency(1.kHz().into());
+        let config = TimerConfig::default().frequency(2.kHz().into());
         let timer = Timer::new(timer, &config)?;
-        let mut channel = Channel::new(channel, timer, pin)?;
-        let max_duty = channel.get_max_duty();
-        channel.set_duty(max_duty * 3 / 4)?;
+        let channel: Channel<C, T, Timer<T>, P> = Channel::new(channel, timer, pin)?;
         return Ok(channel);
     }
 
@@ -42,7 +45,7 @@ impl<P: OutputPin, T: ledc::HwTimer, C: ledc::HwChannel> Beep<P, T, C> {
 
             let curr = curr_ringtone[self.beat as usize];
             if curr {
-                self.channel.set_duty(50).expect("Failed to set duty");
+                self.channel.set_duty(self.duty).expect("Failed to set duty");
             } else {
                 self.channel.set_duty(0).expect("Failed to set duty");
             }
diff --git a/src/main.rs b/src/main.rs
index 553350f..5a5abf8 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,6 @@
 #![feature(is_some_with)]
 use esp_idf_sys as _;
-use log::error;
+use log::{error, info};
 use std::{thread, time::Duration, sync::mpsc, env};
 
 mod beep;
@@ -19,14 +19,14 @@ fn main() {
 
     let peripherals = esp_idf_hal::peripherals::Peripherals::take().unwrap();
 
-    let gpio5 = peripherals.pins.gpio5;
-    let gpio6 = peripherals.pins.gpio6;
+    let blink_pin = peripherals.pins.gpio5;
+    let beep_pin = peripherals.pins.gpio6;
     let ledc_timer0 = peripherals.ledc.timer0;
     let ledc_channel0 = peripherals.ledc.channel0;
     let dc_out_ctl_pin = peripherals.pins.gpio3;
     let i2c0 = peripherals.i2c0;
-    let gpio9 = peripherals.pins.gpio9;
-    let gpio10 = peripherals.pins.gpio10;
+    let sda_pin = peripherals.pins.gpio4;
+    let scl_pin = peripherals.pins.gpio10;
 
     let adc1 = peripherals.adc1;
     let adapter_pin = peripherals.pins.gpio1;
@@ -34,12 +34,11 @@ fn main() {
 
     let (tx, mut rx) = mpsc::channel();
 
-    println!("Starting screen");
-    let display = screen::Screen::new(i2c0, gpio9, gpio10).expect("Failed to create screen");
+    info!("Starting");
 
     thread::spawn(move || {
         let mut blink =
-            blink::Blink::new(gpio5.into_output().expect("Failed to set GPIO5 as output"));
+            blink::Blink::new(blink_pin.into_output().expect("Failed to set GPIO5 as output"));
         blink.play();
     });
 
@@ -49,7 +48,7 @@ fn main() {
 
     thread::spawn(move || {
         let mut beep = beep::Beep::new(
-            gpio6.into_output().expect("Failed to set GPIO6 as output"),
+            beep_pin.into_output().expect("Failed to set GPIO6 as output"),
             ledc_timer0,
             ledc_channel0,
         )
@@ -57,6 +56,8 @@ fn main() {
         beep.play(&mut rx);
     });
 
+    let display = screen::Screen::new(i2c0, sda_pin, scl_pin).expect("Failed to create screen");
+
     let dc_out_ctl = dc_out_controller::DcOutController::new(
         dc_out_ctl_pin
             .into_output()
diff --git a/src/screen.rs b/src/screen.rs
index 6871d90..e924580 100644
--- a/src/screen.rs
+++ b/src/screen.rs
@@ -1,4 +1,4 @@
-use anyhow::{Result};
+use anyhow::{anyhow, Result};
 use embedded_graphics::{
     mono_font::{ascii::FONT_10X20, MonoTextStyle, iso_8859_10::FONT_6X10},
     pixelcolor::Rgb565,
@@ -21,7 +21,7 @@ use ssd1306::{
 };
 
 type Display = Ssd1306<
-    I2CInterface<Master<I2C0, gpio::Gpio9<gpio::Unknown>, gpio::Gpio10<gpio::Unknown>>>,
+    I2CInterface<Master<I2C0, gpio::Gpio4<gpio::Unknown>, gpio::Gpio10<gpio::Unknown>>>,
     DisplaySize128x64,
     BufferedGraphicsMode<DisplaySize128x64>,
 >;
@@ -33,7 +33,7 @@ pub struct Screen {
 impl Screen {
     pub fn new(
         i2c: i2c::I2C0,
-        sda: gpio::Gpio9<gpio::Unknown>,
+        sda: gpio::Gpio4<gpio::Unknown>,
         scl: gpio::Gpio10<gpio::Unknown>,
     ) -> Result<Self> {
         let config = <i2c::config::MasterConfig as Default>::default().baudrate(400.kHz().into());
@@ -55,8 +55,7 @@ impl Screen {
         .into_buffered_graphics_mode();
 
         display
-            .init()
-            .unwrap();
+            .init().map_err(|err| anyhow!("Can not init display: {:?}", err))?;
 
         let mut instance = Screen { display };