diff --git a/src/dc_out_controller.rs b/src/dc_out_controller.rs
index a74e3b8..a7b940a 100644
--- a/src/dc_out_controller.rs
+++ b/src/dc_out_controller.rs
@@ -1,8 +1,8 @@
-use anyhow::{Context, Ok, Result};
+use anyhow::{Ok, Result, anyhow};
 use retry;
 use std::{
     sync::{
-        mpsc::{self},
+        mpsc,
         Arc, Mutex,
     },
     thread,
@@ -10,15 +10,37 @@ use std::{
 };
 
 use embedded_hal::digital::blocking::OutputPin;
-use log::{info, trace, warn};
+use log::*;
+
+pub enum DcOutStatus {
+    On,
+    Off,
+    TurningOn(mpsc::Receiver<bool>),
+    TurningOff(mpsc::Receiver<bool>),
+}
+
+impl DcOutStatus {
+    pub fn is_on(&self) -> bool {
+        match self {
+            DcOutStatus::On => true,
+            _ => false,
+        }
+    }
+    pub fn is_off(&self) -> bool {
+        match self {
+            DcOutStatus::Off => true,
+            _ => false,
+        }
+    }
+}
 
 pub struct DcOutController<P>
 where
     P: OutputPin + Send,
 {
-    pub state: bool,
     pin: Arc<Mutex<P>>,
     shutdown_tx: Option<mpsc::Sender<bool>>,
+    status: DcOutStatus,
 }
 
 impl<P> DcOutController<P>
@@ -29,15 +51,21 @@ where
 {
     pub fn new(pin: P) -> Self {
         return Self {
-            state: false,
+            status: DcOutStatus::On,
             pin: Arc::new(Mutex::new(pin)),
             shutdown_tx: None,
         };
     }
 
-    pub fn start(&mut self) -> Result<()> {
+    pub fn open(&mut self) -> Result<()> {
+        if self.status.is_on() {
+            trace!("DC OUT already on, skipping");
+            return Ok(());
+        }
+
+        let pin = self.pin.clone();
         let mut pin = retry::retry(retry::delay::Fixed::from_millis(100).take(10), || {
-            self.pin.lock()
+            pin.lock()
         })
         .map_err(|_| anyhow::anyhow!("Failed to lock pin"))?;
 
@@ -45,6 +73,9 @@ where
             pin.set_low()
         })
         .map_err(|_| anyhow::anyhow!("Failed to lock pin"))?;
+
+        self.status = DcOutStatus::On;
+        info!("DC OUT ON");
         Ok(())
     }
 
@@ -60,6 +91,9 @@ where
 
         let pin = Arc::clone(&self.pin);
 
+        let (status_tx, status_rx) = mpsc::channel();
+        self.status = DcOutStatus::TurningOff(status_rx);
+
         thread::spawn(move || {
             // Wait for computer shutdown finished
             let target_at = SystemTime::now() + time::Duration::from_secs(10);
@@ -74,14 +108,24 @@ where
                 }
 
                 info!("Shutdown timeout, force shutdown...");
-                retry::retry(retry::delay::Fixed::from_millis(1000).take(10), || {
+
+                let result = || {
+                    retry::retry(retry::delay::Fixed::from_millis(1000).take(10), || {
                     return pin
                         .lock()
                         .map_err(|_| anyhow::anyhow!("Can not lock pin"))?
                         .set_high()
                         .map_err(|_| anyhow::anyhow!("Can not shutdown"));
-                }).expect("Failed to shutdown");
-                info!("Shutdown finished");
+                    }).map_err(|_| anyhow!("Failed to send shutdown status"))?;
+                    status_tx.send(true).map_err(|_| anyhow!("Failed to send shutdown status"))?;
+                    Ok(())
+                };
+
+                if let Err(e) = result() {
+                    warn!("Failed to shutdown: {}", e);
+                } else {
+                    info!("Shutdown finished");
+                }
                 break;
             }
         });
@@ -101,9 +145,37 @@ where
             }
             self.shutdown_tx = None;
         };
-
-        self.start()?;
-        info!("Power restored");
         Ok(())
     }
+
+    pub fn get_status(&mut self) -> DcOutStatus {
+        match &self.status {
+            DcOutStatus::TurningOn(rx) => {
+                rx.try_recv().map_or((), |state| {
+                    trace!("DcOutStatus::TurningOn({})", state);
+                    if state {
+                        self.status = DcOutStatus::On;
+                    } else {
+                        self.status = DcOutStatus::Off;
+                    }
+                })
+            },
+            DcOutStatus::TurningOff(rx) => {
+                rx.try_recv().map_or((), |state| {
+                    trace!("DcOutStatus::TurningOff({})", state);
+                    if state {
+                        self.status = DcOutStatus::Off;
+                    } else {
+                        self.status = DcOutStatus::On;
+                    }
+                })
+            },
+            _default => {}
+        }
+        match &self.status {
+            DcOutStatus::On => DcOutStatus::On,
+            DcOutStatus::Off => DcOutStatus::Off,
+            _ => DcOutStatus::On,
+        }
+    }
 }
diff --git a/src/main.rs b/src/main.rs
index c259209..553350f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,6 @@
 #![feature(is_some_with)]
 use esp_idf_sys as _;
+use log::error;
 use std::{thread, time::Duration, sync::mpsc, env};
 
 mod beep;
@@ -8,7 +9,8 @@ mod dc_out_controller;
 mod manager;
 mod screen;
 fn main() {
-    env::set_var("RUST_LOG", env!("RUST_LOG"));
+    env::set_var("DEFMT_LOG", "trace");
+    env::set_var("RUST_LOG", "trace");
     env_logger::init();
     // Temporary. Will disappear once ESP-IDF 4.4 is released, but for now it is necessary to call this function once,
     // or else some patches to the runtime implemented by esp-idf-sys might not link properly.
@@ -69,7 +71,12 @@ fn main() {
         tx,
     ).expect("Failed to create manager");
     loop {
-        manager.handling_once().expect("Failed to handle once");
+        match manager.handling_once() {
+            Ok(_) => {}
+            Err(err) => {
+                error!("Exec manager tick task failed: {}", err);
+            }
+        }
         thread::sleep(Duration::from_millis(100));
     }
 }
diff --git a/src/manager.rs b/src/manager.rs
index bf602e3..3561701 100644
--- a/src/manager.rs
+++ b/src/manager.rs
@@ -1,11 +1,11 @@
+use anyhow::{anyhow, Result};
 use embedded_hal::digital::blocking::OutputPin;
 use embedded_hal_0_2::adc::OneShot;
 use esp_idf_hal::{
     adc::{Atten11dB, PoweredAdc, ADC1},
     gpio::{Gpio1, Gpio2},
 };
-use esp_idf_sys::EspError;
-use log::info;
+use log::*;
 use std::{
     sync::mpsc,
     thread,
@@ -43,11 +43,12 @@ where
         adapter_pin: AdapterGpio,
         battery_pin: BatteryGpio,
         tx: mpsc::Sender<ringtone::Type>,
-    ) -> Result<Self, EspError> {
+    ) -> Result<Self> {
         let adc = PoweredAdc::new(
             adc1,
             esp_idf_hal::adc::config::Config::new().calibration(true),
-        )?;
+        )
+        .map_err(|err| anyhow!("Can not init Adc: {}", err))?;
         return Ok(Manager {
             dc_out_controller,
             screen,
@@ -59,14 +60,22 @@ where
         });
     }
 
-    pub fn get_adapter_voltage(&mut self) -> Result<f32, EspError> {
-        return Ok(self.adc.read(&mut self.adapter_pin).unwrap() as f32);
+    pub fn get_adapter_voltage(&mut self) -> Result<f32> {
+        return Ok(self
+            .adc
+            .read(&mut self.adapter_pin)
+            .map_err(|err| anyhow!("Can not read adapter voltage. {:?}", err))?
+            as f32);
     }
-    pub fn get_battery_voltage(&mut self) -> Result<f32, EspError> {
-        return Ok(self.adc.read(&mut self.battery_pin).unwrap() as f32);
+    pub fn get_battery_voltage(&mut self) -> Result<f32> {
+        return Ok(self
+            .adc
+            .read(&mut self.battery_pin)
+            .map_err(|err| anyhow!("Can not read battery voltage. {:?}", err))?
+            as f32);
     }
 
-    pub fn handling_once(&mut self) -> Result<(), EspError> {
+    pub fn handling_once(&mut self) -> Result<()> {
         let mut adapter = 0.0_f32;
         let mut battery = 0.0_f32;
         for _ in 0..10 {
@@ -78,40 +87,61 @@ where
         adapter /= 10.0_f32;
         battery /= 10.0_f32;
 
-        if adapter < 1000.0 {
-            if self.adapter_downed_at.is_none() {
-                info!("Recording adapter downed at: {:?}", SystemTime::now());
-                self.adapter_downed_at = Some(SystemTime::now());
-            }
-            if battery < 500.0 {
+        if is_adapter_down(adapter) {
+            if self.dc_out_controller.get_status().is_off() {
+                self.tx
+                    .send(ringtone::SILENCE)
+                    .map_err(|err| anyhow!("Can not send silence to Beep. {:?}", err))?;
+            } else if is_battery_down(battery) {
                 self.tx
                     .send(ringtone::BATTERY_LOW)
                     .expect("Can not send message");
-            } else if battery < 1500.0
-                && self
-                    .adapter_downed_at
-                    .is_some_and(|at| at.elapsed().is_ok_and(|dur| dur > &Duration::from_secs(10)))
-            {
+            } else if is_battery_low(battery) {
                 self.dc_out_controller.shutdown();
-                self.tx
-                    .send(ringtone::SHUTDOWN)
-                    .expect("Can not send message");
+                if self.adapter_downed_at.is_none() {
+                    info!("Recording adapter downed at: {:?}", SystemTime::now());
+                    self.adapter_downed_at = Some(SystemTime::now());
+                } else if self
+                    .adapter_downed_at
+                    .is_some_and(|at| at.elapsed().is_ok_and(|dur| *dur > Duration::from_secs(5)))
+                {
+                    self.tx
+                        .send(ringtone::SHUTDOWN)
+                        .map_err(|err| anyhow!("Can not send shutdown to Beep. {:?}", err))?;
+                }
             } else {
                 self.tx
                     .send(ringtone::ADAPTER_DOWN)
-                    .expect("Can not send message");
+                    .map_err(|err| anyhow!("Can not send adapter down to Beep. {:?}", err))?;
+                self.dc_out_controller
+                    .stop_shutdown()
+                    .map_err(|err| anyhow!("Can not stop shutdown. {:?}", err))?;
+                self.adapter_downed_at = None;
             }
         } else {
-            self.dc_out_controller.stop_shutdown().expect("Can not stop shutdown");
+            self.dc_out_controller
+                .stop_shutdown()
+                .expect("Can not stop shutdown");
+            self.tx.send(ringtone::SILENCE).map_err(|err| anyhow!("Can not send silence to Beep. {:?}", err))?;
             self.adapter_downed_at = None;
-            self.tx
-                .send(ringtone::SILENCE)
-                .expect("Can not send message");
+            self.dc_out_controller.open()?;
         }
         self.screen
             .draw_voltage(adapter, battery)
-            .expect("Failed to draw voltage");
+            .map_err(|err| anyhow!("Can not draw voltage. {:?}", err))?;
 
-        Ok({})
+        Ok(())
     }
 }
+
+fn is_battery_low(battery: f32) -> bool {
+    battery < 1500.0
+}
+
+fn is_battery_down(battery: f32) -> bool {
+    battery < 500.0
+}
+
+fn is_adapter_down(adapter: f32) -> bool {
+    adapter < 1000.0
+}