Guide to using PowerShell with your Room Alert 3E

A description of how to retrieve sensor data from your Room Alert 3E using Windows PowerShell. Whilst the examples here use the Room Alert 3E as the target, very similar techniques would work with all of the other Room Alert models as well.

Introduction to PowerShell

PowerShell (including Windows PowerShell and PowerShell Core) is a task automation and configuration management framework from Microsoft, consisting of a command-line shell and associated scripting language built on the .NET Framework and .NET Core.

Accessing Room Alert Data

You can read the data from your Room Alert with the following Powershell command:

Invoke-RestMethod is quite a useful Powershell cmdlet because it does a lot of the heavy lifting for you. $room_alert_data will now contain a .NET object containing a number of properties taken from the JSON data retrieved from the Room Alert. You can access the data as you would a regular object property.

Room Alert Data

PropertyDescriptionExample Data
name Name of the Room Alert. Defaults to the serial number. RA3E-129912
date Date / time as set on the Room Alert 07/19/17 09:50:58
uptime How long the Room Alert has been running 1d 18:36:45
scale Temperature scale. 1 for Fahrenheit, 0 for Celsius 1
macaddr MAC address of the Room Alert 00:80:A3:93:EC:C8
serial Serial number of the Room Alert RA3E-129912
refresh Interval in seconds between refreshes of the web interface 60
gtmd_interval Number of seconds between sending data to GoToMyDevices.com 3600
version Firmware version number v2.0.0
port Port for the Room Alert web interface 80
ip IP address of the Room Alert 10.0.0.152
gtmd_disabled Status of the GoToMyDevices.com synchronisation. 0 for enabled, 1 for disabled 0
time_config Time zone and daylight saving information @{timezone=0; format=0; display=0; daylight_saving_en=0}
sensor Collection of digital sensor data {@{label=Internal Sensor; tempf=75.30; tempc=24.06; highf=76.87; highc=24.93; lowf=72.37; lowc=22.43; alarm=4; type=16; enabled=1}, @{label=Ext Sensor 1; tempf=75.65; tempc=24.25; highf=77.32; highc=25.18; lowf=74.40; lowc=23.56; alarm=0; type=16; enabled=1}}
switch_sen Collection of switch sensor data {@{label=Switch Sen 1; enabled=1; alarm=1; status=0}}

Sensor Data

Now you've read all of the data from your Room Alert, how do you access the sensor data?

The data for each sensor type is stored separately. The digital sensor data is stored in the sensor collection and the switch sensor data is stored inside switch_sen.

First we'll tackle how to access the digital sensor data.

Next up is the switch sensor collection. This works much the same as the digital sensor collection but the properties vary slightly.

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