diff --git a/installer.ps1 b/installer.ps1
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+#
+# © 2023 Peter Cole
+# 
+# This file is part of EX-CommandStation
+#
+# This is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# It is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with CommandStation.  If not, see <https://www.gnu.org/licenses/>.
+#
+
+# 32/64 bit Win installer
+# https://downloads.arduino.cc/arduino-cli/arduino-cli_latest_Windows_32bit.zip
+# https://downloads.arduino.cc/arduino-cli/arduino-cli_latest_Windows_64bit.zip
+
+param(
+  [Parameter()]
+  [String]$BUILD_DIR
+)
+
+if (!$PSBoundParameters.ContainsKey('BUILD_DIR')) {
+# Use the current date/time stamp to create a unique directory if one is not specified.
+  $BUILD_DATE = Get-Date -Format 'yyyyMMdd-HHmmss'
+  $BUILD_DIR = $env:TEMP + "\" + $BUILD_DATE
+}
+
+if ((Get-WmiObject win32_operatingsystem | Select-Object osarchitecture).osarchitecture -eq "64-bit") {
+  $URL = "https://downloads.arduino.cc/arduino-cli/arduino-cli_latest_Windows_64bit.zip"
+  $OUTFILE = $env:TEMP + "\" + "arduino-cli_latest_Windows_64bit.zip"
+} else {
+  $URL = "https://downloads.arduino.cc/arduino-cli/arduino-cli_latest_Windows_32bit.zip"
+  $OUTFILE = $env:TEMP + "\" + "arduino-cli_latest_Windows_32bit.zip"
+}
+
+Write-Output "Downloading installer to $OUTFILE"
+
+$ProgressPreference = "SilentlyContinue"
+Invoke-WebRequest -Uri $URL -OutFile $OUTFILE
+
+$CLI_INSTALL = $env:TEMP + "\" + "arduino-cli_installer"
+
+Expand-Archive -Path $OUTFILE -DestinationPath $CLI_INSTALL -Force
+$ProgressPreference = "Continue"
+
+Write-Output "Installing using directory $BUILD_DIR"
\ No newline at end of file