diff --git a/CHANGELOG.md b/CHANGELOG.md
index 49e13439..16b598eb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,12 @@
+# 0.11.4 (2024-01-01)
+
+## Bugfixes
+
+- Fix issue with manufacturer data not being consistently found on windows
+- Fix UUID used for finding characteristics on windows
+- Peripheral connection failure now returns an error
+- Peripheral service discovery failure now returns an error
+
 # 0.11.3 (2023-11-18)
 
 ## Bugfixes
diff --git a/Cargo.toml b/Cargo.toml
index acca3d75..6b788a53 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "btleplug"
-version = "0.11.3"
+version = "0.11.4"
 authors = ["Nonpolynomial, LLC <kyle@nonpolynomial.com>"]
 license = "MIT/Apache-2.0/BSD-3-Clause"
 repository = "https://github.com/deviceplug/btleplug"
@@ -22,18 +22,18 @@ path = "src/lib.rs"
 serde = ["uuid/serde", "serde_cr", "serde_bytes"]
 
 [dependencies]
-async-trait = "0.1.74"
+async-trait = "0.1.76"
 log = "0.4.20"
 bitflags = "2.4.1"
-thiserror = "1.0.50"
-uuid = "1.5.0"
-serde_cr = { package = "serde", version = "1.0.192", features = ["derive"], default-features = false, optional = true }
-serde_bytes = { version = "0.11.12", optional = true }
+thiserror = "1.0.53"
+uuid = "1.6.1"
+serde_cr = { package = "serde", version = "1.0.193", features = ["derive"], default-features = false, optional = true }
+serde_bytes = { version = "0.11.13", optional = true }
 dashmap = "5.5.3"
-futures = "0.3.29"
+futures = "0.3.30"
 static_assertions = "1.1.0"
 # rt feature needed for block_on in macOS internal thread
-tokio = { version = "1.34.0", features = ["sync", "rt"] }
+tokio = { version = "1.35.1", features = ["sync", "rt"] }
 tokio-stream = { version = "0.1.14", features = ["sync"] }
 
 [target.'cfg(target_os = "linux")'.dependencies]
@@ -42,13 +42,13 @@ bluez-async = "0.7.2"
 
 [target.'cfg(target_os = "android")'.dependencies]
 jni = "0.19.0"
-once_cell = "1.18.0"
+once_cell = "1.19.0"
 jni-utils = "0.1.1"
 
 [target.'cfg(any(target_os = "macos", target_os = "ios"))'.dependencies]
 cocoa = "0.25.0"
 objc = "0.2.7"
-libc = "0.2.150"
+libc = "0.2.151"
 
 [target.'cfg(target_os = "windows")'.dependencies]
 windows = { version = "0.52.0", features = ["Devices_Bluetooth", "Devices_Bluetooth_GenericAttributeProfile", "Devices_Bluetooth_Advertisement", "Devices_Radios", "Foundation_Collections", "Foundation", "Storage_Streams"] }
@@ -56,5 +56,5 @@ windows = { version = "0.52.0", features = ["Devices_Bluetooth", "Devices_Blueto
 [dev-dependencies]
 rand = "0.8.5"
 pretty_env_logger = "0.5.0"
-tokio = { version = "1.34.0", features = ["macros", "rt", "rt-multi-thread"] }
-serde_json = "1.0.108"
+tokio = { version = "1.35.1", features = ["macros", "rt", "rt-multi-thread"] }
+serde_json = "1.0.109"
diff --git a/src/corebluetooth/central_delegate.rs b/src/corebluetooth/central_delegate.rs
index 6cba34b5..bf3dfe67 100644
--- a/src/corebluetooth/central_delegate.rs
+++ b/src/corebluetooth/central_delegate.rs
@@ -91,6 +91,7 @@ pub enum CentralDelegateEvent {
     },
     ConnectionFailed {
         peripheral_uuid: Uuid,
+        error_description: Option<String>,
     },
     DisconnectedDevice {
         peripheral_uuid: Uuid,
@@ -176,9 +177,13 @@ impl Debug for CentralDelegateEvent {
                 .debug_struct("ConnectedDevice")
                 .field("peripheral_uuid", peripheral_uuid)
                 .finish(),
-            CentralDelegateEvent::ConnectionFailed { peripheral_uuid } => f
+            CentralDelegateEvent::ConnectionFailed {
+                peripheral_uuid,
+                error_description,
+            } => f
                 .debug_struct("ConnectionFailed")
                 .field("peripheral_uuid", peripheral_uuid)
+                .field("error_description", error_description)
                 .finish(),
             CentralDelegateEvent::DisconnectedDevice { peripheral_uuid } => f
                 .debug_struct("DisconnectedDevice")
@@ -486,13 +491,18 @@ pub mod CentralDelegate {
         _cmd: Sel,
         _central: id,
         peripheral: id,
-        _error: id,
+        error: id,
     ) {
         trace!("delegate_centralmanager_didfailtoconnectperipheral_error");
         let peripheral_uuid = nsuuid_to_uuid(cb::peer_identifier(peripheral));
+        let error_description_ns = ns::error_localizeddescription(error);
+        let error_description = nsstring_to_string(error_description_ns);
         send_delegate_event(
             delegate,
-            CentralDelegateEvent::ConnectionFailed { peripheral_uuid },
+            CentralDelegateEvent::ConnectionFailed {
+                peripheral_uuid,
+                error_description,
+            },
         );
     }
 
diff --git a/src/corebluetooth/framework.rs b/src/corebluetooth/framework.rs
index b00830b2..2efa110b 100644
--- a/src/corebluetooth/framework.rs
+++ b/src/corebluetooth/framework.rs
@@ -94,6 +94,15 @@ pub mod ns {
             uuidstring
         }
     }
+
+    // NSError
+
+    pub fn error_localizeddescription(nserror: id) -> id /* NSString* */ {
+        unsafe {
+            let description: id = msg_send![nserror, localizedDescription];
+            description
+        }
+    }
 }
 
 pub mod cb {
diff --git a/src/corebluetooth/internal.rs b/src/corebluetooth/internal.rs
index 8d538196..2aa00dc5 100644
--- a/src/corebluetooth/internal.rs
+++ b/src/corebluetooth/internal.rs
@@ -606,8 +606,13 @@ impl CoreBluetoothInternal {
         // itself when it receives all of its service/characteristic info.
     }
 
-    fn on_peripheral_connection_failed(&mut self, peripheral_uuid: Uuid) {
+    fn on_peripheral_connection_failed(
+        &mut self,
+        peripheral_uuid: Uuid,
+        error_description: Option<String>,
+    ) {
         trace!("Got connection fail event!");
+        let error = error_description.unwrap_or(String::from("Connection failed"));
         if self.peripherals.contains_key(&peripheral_uuid) {
             let peripheral = self
                 .peripherals
@@ -619,7 +624,7 @@ impl CoreBluetoothInternal {
                 .unwrap()
                 .lock()
                 .unwrap()
-                .set_reply(CoreBluetoothReply::Err(String::from("Connection failed")));
+                .set_reply(CoreBluetoothReply::Err(error));
         }
     }
 
@@ -1026,8 +1031,8 @@ impl CoreBluetoothInternal {
                     CentralDelegateEvent::ConnectedDevice{peripheral_uuid} => {
                             self.on_peripheral_connect(peripheral_uuid)
                     },
-                    CentralDelegateEvent::ConnectionFailed{peripheral_uuid} => {
-                        self.on_peripheral_connection_failed(peripheral_uuid)
+                    CentralDelegateEvent::ConnectionFailed{peripheral_uuid, error_description} => {
+                        self.on_peripheral_connection_failed(peripheral_uuid, error_description)
                     },
                     CentralDelegateEvent::DisconnectedDevice{peripheral_uuid} => {
                         self.on_peripheral_disconnect(peripheral_uuid).await
diff --git a/src/corebluetooth/peripheral.rs b/src/corebluetooth/peripheral.rs
index 5a8cf1bd..462ee55a 100644
--- a/src/corebluetooth/peripheral.rs
+++ b/src/corebluetooth/peripheral.rs
@@ -252,7 +252,8 @@ impl api::Peripheral for Peripheral {
                 self.shared
                     .emit_event(CentralEvent::DeviceConnected(self.shared.uuid.into()));
             }
-            _ => panic!("Shouldn't get anything but connected!"),
+            CoreBluetoothReply::Err(msg) => return Err(Error::RuntimeError(msg)),
+            _ => panic!("Shouldn't get anything but connected or err!"),
         }
         trace!("Device connected!");
         Ok(())
diff --git a/src/winrtble/ble/watcher.rs b/src/winrtble/ble/watcher.rs
index 29304d8c..fb9126a2 100644
--- a/src/winrtble/ble/watcher.rs
+++ b/src/winrtble/ble/watcher.rs
@@ -51,6 +51,7 @@ impl BLEWatcher {
         self.watcher
             .SetScanningMode(BluetoothLEScanningMode::Active)
             .unwrap();
+        self.watcher.SetAllowExtendedAdvertisements(true)?;
         let handler: TypedEventHandler<
             BluetoothLEAdvertisementWatcher,
             BluetoothLEAdvertisementReceivedEventArgs,
diff --git a/src/winrtble/peripheral.rs b/src/winrtble/peripheral.rs
index c2ba385f..5dc97480 100644
--- a/src/winrtble/peripheral.rs
+++ b/src/winrtble/peripheral.rs
@@ -146,23 +146,25 @@ impl Peripheral {
             }
         }
         if let Ok(manufacturer_data) = advertisement.ManufacturerData() {
-            let mut manufacturer_data_guard = self.shared.latest_manufacturer_data.write().unwrap();
-
-            *manufacturer_data_guard = manufacturer_data
-                .into_iter()
-                .map(|d| {
-                    let manufacturer_id = d.CompanyId().unwrap();
-                    let data = utils::to_vec(&d.Data().unwrap());
-
-                    (manufacturer_id, data)
-                })
-                .collect();
-
-            // Emit event of newly received advertisement
-            self.emit_event(CentralEvent::ManufacturerDataAdvertisement {
-                id: self.shared.address.into(),
-                manufacturer_data: manufacturer_data_guard.clone(),
-            });
+            if manufacturer_data.Size().unwrap() > 0 {
+                let mut manufacturer_data_guard =
+                    self.shared.latest_manufacturer_data.write().unwrap();
+                *manufacturer_data_guard = manufacturer_data
+                    .into_iter()
+                    .map(|d| {
+                        let manufacturer_id = d.CompanyId().unwrap();
+                        let data = utils::to_vec(&d.Data().unwrap());
+
+                        (manufacturer_id, data)
+                    })
+                    .collect();
+
+                // Emit event of newly received advertisement
+                self.emit_event(CentralEvent::ManufacturerDataAdvertisement {
+                    id: self.shared.address.into(),
+                    manufacturer_data: manufacturer_data_guard.clone(),
+                });
+            }
         }
 
         // The Windows Runtime API (as of 19041) does not directly expose Service Data as a friendly API (like Manufacturer Data above)
@@ -454,6 +456,7 @@ impl ApiPeripheral for Peripheral {
                         }
                         Err(e) => {
                             error!("get_characteristics_async {:?}", e);
+                            return Err(e);
                         }
                     }
                 }
@@ -572,7 +575,7 @@ impl ApiPeripheral for Peripheral {
             .ok_or_else(|| Error::NotSupported("Service not found for read".into()))?;
         let ble_characteristic = ble_service
             .characteristics
-            .get(&descriptor.uuid)
+            .get(&descriptor.characteristic_uuid)
             .ok_or_else(|| Error::NotSupported("Characteristic not found for read".into()))?;
         let ble_descriptor = ble_characteristic
             .descriptors