From e5ce441af46be7108adb48f1e08994589c3b839b Mon Sep 17 00:00:00 2001
From: Alsey Coleman Miller <alseycmiller@gmail.com>
Date: Thu, 13 Sep 2018 23:29:30 -0500
Subject: [PATCH] Working on Central

---
 Sources/DarwinGATT/DarwinCentral.swift | 3 +++
 Sources/GATT/GATTCentral.swift         | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/Sources/DarwinGATT/DarwinCentral.swift b/Sources/DarwinGATT/DarwinCentral.swift
index 2bebda4..3300553 100644
--- a/Sources/DarwinGATT/DarwinCentral.swift
+++ b/Sources/DarwinGATT/DarwinCentral.swift
@@ -325,6 +325,9 @@ public final class DarwinCentral: NSObject, CentralProtocol, CBCentralManagerDel
             // write request
             corePeripheral.writeValue(data, for: coreCharacteristic, type: writeType)
             
+            guard coreCharacteristic.properties.contains(.writeWithoutResponse) == false
+                else { return }
+            
             // calls `peripheral:didWriteValueForCharacteristic:error:` only
             // if you specified the write type as `.withResponse`.
             
diff --git a/Sources/GATT/GATTCentral.swift b/Sources/GATT/GATTCentral.swift
index fd9bdbb..fa844d9 100644
--- a/Sources/GATT/GATTCentral.swift
+++ b/Sources/GATT/GATTCentral.swift
@@ -149,11 +149,16 @@ public final class GATTCentral <HostController: BluetoothHostControllerInterface
     public func disconnect(peripheral: Peripheral) {
         
         self.connections[peripheral] = nil
+        
+        // L2CAP socket may be retained by background thread
+        sleep(1)
     }
     
     public func disconnectAll() {
         
         self.connections.removeAll(keepingCapacity: true)
+        
+        sleep(1)
     }
     
     public func discoverServices(_ services: [BluetoothUUID] = [],