diff --git a/CumulusMX/EcowittApi.cs b/CumulusMX/EcowittApi.cs
index 5bd0801b..54934ed8 100644
--- a/CumulusMX/EcowittApi.cs
+++ b/CumulusMX/EcowittApi.cs
@@ -7,6 +7,7 @@
 using System.Reactive;
 using System.Runtime.Serialization;
 using System.Text;
+using System.Threading;
 using System.Threading.Tasks;
 using ServiceStack;
 using ServiceStack.Text;
@@ -65,7 +66,7 @@ public EcowittApi(Cumulus cuml, WeatherStation stn)
 		}
 
 
-		internal bool GetHistoricData(DateTime startTime, DateTime endTime)
+		internal bool GetHistoricData(DateTime startTime, DateTime endTime, CancellationToken token)
 		{
 			var data = new EcowittHistoricData();
 
@@ -267,7 +268,7 @@ internal bool GetHistoricData(DateTime startTime, DateTime endTime)
 								}
 
 								cumulus.LogMessage("API.GetHistoricData: System Busy or Rate Limited, waiting 5 secs before retry...");
-								System.Threading.Thread.Sleep(5000);
+								Task.Delay(5000, token).Wait();
 							}
 							else
 							{
@@ -292,7 +293,10 @@ internal bool GetHistoricData(DateTime startTime, DateTime endTime)
 					//
 				} while (!success);
 
-				ProcessHistoryData(data);
+				if (!token.IsCancellationRequested)
+				{
+					ProcessHistoryData(data, token);
+				}
 
 				return true;
 			}
@@ -305,7 +309,7 @@ internal bool GetHistoricData(DateTime startTime, DateTime endTime)
 
 		}
 
-		private void ProcessHistoryData(EcowittHistoricData data)
+		private void ProcessHistoryData(EcowittHistoricData data, CancellationToken token)
 		{
 			// allocate a dictionary of data objects, keyed on the timestamp
 			var buffer = new SortedDictionary<DateTime, EcowittApi.HistoricData>();
@@ -1163,6 +1167,11 @@ private void ProcessHistoryData(EcowittHistoricData data)
 
 			foreach (var rec in buffer)
 			{
+				if (token.IsCancellationRequested)
+				{
+					return;
+				}
+
 				cumulus.LogMessage("Processing data for " + rec.Key);
 
 				var h = rec.Key.Hour;
diff --git a/CumulusMX/GW1000Station.cs b/CumulusMX/GW1000Station.cs
index 0b03b4d2..7b60d329 100644
--- a/CumulusMX/GW1000Station.cs
+++ b/CumulusMX/GW1000Station.cs
@@ -292,7 +292,7 @@ private void GetHistoricData()
 				maxArchiveRuns++;
 			}
 
-			EcowittApi.GetHistoricData(startTime, endTime);
+			EcowittApi.GetHistoricData(startTime, endTime, cancellationToken);
 		}
 
 		private Discovery DiscoverGW1000()
diff --git a/CumulusMX/HttpStationEcowitt.cs b/CumulusMX/HttpStationEcowitt.cs
index 675b8a7d..473bfe37 100644
--- a/CumulusMX/HttpStationEcowitt.cs
+++ b/CumulusMX/HttpStationEcowitt.cs
@@ -10,6 +10,7 @@
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Text;
+using System.Threading;
 using System.Threading.Tasks;
 
 namespace CumulusMX
@@ -20,6 +21,8 @@ class HttpStationEcowitt : WeatherStation
 		private readonly WeatherStation station;
 		private bool starting = true;
 		private bool stopping = false;
+		private readonly CancellationTokenSource tokenSource = new CancellationTokenSource();
+		private CancellationToken cancellationToken;
 		private readonly NumberFormatInfo invNum = CultureInfo.InvariantCulture.NumberFormat;
 		private bool reportStationType = true;
 		private int lastMinute = -1;
@@ -117,7 +120,7 @@ public HttpStationEcowitt(Cumulus cumulus, WeatherStation station = null) : base
 				cumulus.Units.LeafWetnessUnitText = "%";
 			}
 
-
+			cancellationToken = tokenSource.Token;
 
 			// Only perform the Start-up if we are a proper station, not a Extra Sensor
 			if (mainStation)
@@ -150,6 +153,10 @@ public override void Stop()
 			stopping = true;
 			Api.stationEcowitt = null;
 			Api.stationEcowittExtra = null;
+			if (tokenSource != null)
+			{
+				tokenSource.Cancel();
+			}
 			if (station == null)
 			{
 				StopMinuteTimer();
@@ -211,7 +218,7 @@ private void GetHistoricData()
 				maxArchiveRuns++;
 			}
 
-			ecowittApi.GetHistoricData(startTime, endTime);
+			ecowittApi.GetHistoricData(startTime, endTime, cancellationToken);
 
 		}
 
diff --git a/Updates.txt b/Updates.txt
index e3748405..d44b202b 100644
--- a/Updates.txt
+++ b/Updates.txt
@@ -9,7 +9,7 @@ New
 	<#MySqlRealtimeTime> = time of last real-time table insert
 	<#MySqlIntervalTime> = time of last interval data table insert
 - Most weather value web tags now perform unit conversion. Specify the web tag parameter: unit=[xx]
-	Where [xx] is one of the following (case sensitive):
+	Where [xx] is one of the following (case insensitive):
 		Temperature: C | F
 		Pressure   : hPa | mb | kPa | inHg
 		Wind       : mph | kph | ms | kt
@@ -34,9 +34,13 @@ Fixed
 - Davis VP2 logger downloading entire contents if CMX was restarted before the next console log interval
 - Stop second instance on Linux, this now uses a lock file to prevent a second instance from running
 - Fix Custom HTTP intervals from trying to process null entries
-- Fix for Davis WLL missed broadcast package counter not being incremented
-- Fix for Davis WLL processing broadcast messages twice or more on systems with both IPv4 and IPv6 enabled
-- Fix for missing average temperature calculation during Ecowitt catch-up
+- Davis WLL
+	- Missed broadcast package counter not being incremented
+	- No longer processes broadcast messages twice or more on systems with multiple network interfaces
+	- Improved collision avoidance between broadcasts and API requests
+- Ecowitt
+	- Fix for missing average temperature calculation during Ecowitt historic catch-up
+	- Historic catch-up is now cancellable with Ctrl-C
 
 
 3.22.4 - b3215