LaMetric Binding

The LaMetric binding allows to connect openHab to LaMetric Time connected clock devices, providing following features:

  • Control the LaMetric Time Device
    • Control Display Brightness
    • Change Audio Volume
    • Enable / Disable Bluetooth
    • Activate an Application
  • Send notifications messages
  • Control the core (built-in) apps

Supported Things

The device acts as a bridge and is exposed as “LaMetric Time” Thing. The “LaMetric Time” Thing is directly responsible for device operations which include the display, audio, bluetooth, and notifications. All apps are implemented as separate things under the bridge.

App Thing Type Description
Clock clockApp Clock that dispays time and date
Timer countdownApp A countdown timer that counts by seconds
Radio radioApp Streaming radio player
Stopwatch stopwatchApp Stopwatch that counts up by seconds
Weather weatherApp Current weather conditions as well as a forecast

Discovery

The binding supports two levels of discovery - device and apps. Device discovery is accomplished via UPnP. Once a device is added, discovery will find all apps installed on the device and suggest them as individual things with the device being the bridge.

Binding Configuration

The binding requires no special configuration.

Thing Configuration

Bridge (Thing ID: “device”)

The bridge requires a host and an API key. The key can be found by visiting the LaMetric dev portal.

Configuration Parameter Type Description Default Required
host text Host name or network address of the LaMetric Time   Yes
apiKey text API key to access LaMetric Time   Yes

Core (Built-in) Apps (Thing ID: “clockApp”, “countdownApp”, “radioApp”, “stopwatchApp”, “weatherApp”)

The core app things can be defined with no configuration at all. The package name is defaulted for you. If you do not specify a widget ID, the first available one will be used automatically. Widgets are instances of the application. For example, if you duplicated the weather app for two locations, the app would have two widgets.

Configuration Parameter Type Description Default Required
widgetId text The identifier for the exact instance of the app (widget) The first widget ID found No

Sample Thing Configuration

Bridge lametrictime:device:demo [ host="somehost", apiKey="ksfjsdkfsksjfs" ]
{
    Thing clockApp     clock       [ widgetId="generatedcorewidgetid1" ]
    Thing countdownApp timer
    Thing radioApp     radio
    Thing stopwatchApp stopwatch
    Thing weatherApp   weather     [ widgetId="generatedcorewidgetid2" ]
}

Channels

Device

Channel ID Item Type Description
brightness Dimmer The brightness of the display. Please note that changing the brightness will automatically set the ‘brightnessMode’ to ‘manual’.
brightnessMode String (possible values are ‘auto’ and ‘manual’) The mode for the display brightness. If set to ‘auto’ the brightness is set by the device automatically based on environment illumination. If set to ‘manual’ the brightness can be changed via ‘brightness’ channel.
volume Dimmer The volume of the device speaker.
bluetooth Switch The status of Bluetooth audio streaming on the device.
app String The active application on the device. State options for UIs are determined at runtime automatically. The value must be formatted as ‘:'.
info String Send informational notifications to the device.
warning String Send warning notifications to the device.
alert String Send alert notifications to the device.

Apps

Note that app channels have no defined state from the device. They exist as one-way communication only.

Clock App

Channel ID Item Type Description
setAlarm DateTime Set the alarm using the given time (note that the date is not used)
command String Send a command to the app (disableAlarm)

Timer App

Channel ID Item Type Description
duration Number Set the duration of the timer in seconds
command String Send a command to the app (start, pause, reset)

Radio App

Channel ID Item Type Description
control Player Control interface to manipulate the radio

Stopwatch App

Channel ID Item Type Description
command String Send a command to the app (start, pause, reset)

Weather App

Channel ID Item Type Description
command String Send a command to the app (forecast)

How Tos

The following configuration examples assume the device was added with the thing id lametrictime:device:demo. Replace the thing id in all the configurations with your real thing id which can be looked up via paper UI.

Notifications

Simple text notifications

The binding provides three simple notification channels for info messages (channel id info), warning messages (channel id warning) and alert messages (channel id alert).

To post messages to these channels, simply map them to a String item, e.g. like this:

String DeviceNotifyInfo "Info Message" {channel="lametrictime:device:demo:info"}

By setting a text on the item, the binding will send the notification which is then shown on the LaMetric device.

In a rule this can be done the following way:

sendCommand(DeviceNotifyInfo, "My Information Message to be displayed")

Items

Sample item configuration:

Dimmer DeviceBrightness         "Brightness"                                { channel="lametrictime:device:demo:brightness" }
String DeviceBrightnessMode     "Brightness Mode"                           { channel="lametrictime:device:demo:brightnessMode" }
Dimmer DeviceVolume             "Volume"                                    { channel="lametrictime:device:demo:volume" }
Switch DeviceBluetooth          "Bluetooth"                                 { channel="lametrictime:device:demo:bluetooth" }
String DeviceApp                "Application"                               { channel="lametrictime:device:demo:app" }

String DeviceNotifyInfo         "Info Message"                              { channel="lametrictime:device:demo:info" }
String DeviceNotifyWarning      "Warning Message"                           { channel="lametrictime:device:demo:warning" }
String DeviceNotifyAlert        "Alert Message"                             { channel="lametrictime:device:demo:alert" }
Switch NotifyInfo               "Notify Info"
Switch NotifyWarning            "Notify Warning"
Switch NotifyAlert              "Notify Alert"

DateTime ClockSetAlarm          "Set Alarm"                                 { channel="lametrictime:clockApp:demo:clock:setAlarm" }
String   ClockCommand           "Clock Command"                             { channel="lametrictime:clockApp:demo:clock:command" }
Switch   SetAlarmIn1Min         "Set Alarm in 1 min"

Number TimerDuration            "Timer Duration"                            { channel="lametrictime:countdownApp:demo:timer:duration" }
String TimerCommand             "Timer Command"                             { channel="lametrictime:countdownApp:demo:timer:command" }
Switch Set2MinTimer             "Set 2 Minute Timer"

Player RadioControl             "Player"                                    { channel="lametrictime:radioApp:demo:radio:control" }

String StopwatchCommand         "Stopwatch Command"                         { channel="lametrictime:stopwatchApp:demo:stopwatch:command" }

String WeatherCommand           "Weather Command"                           { channel="lametrictime:weatherApp:demo:weather:command" }

Sitemap

Sample sitemap configuration:

Note: Populating switch or selection options automatically from the state description is not currently possible with sitemaps. For this reason, the brightness modes and example applications are repeated here.

        Text label="LaMetric Time Demo" {
            Frame label="Device Controls" {
                Slider item=DeviceBrightness
                Switch item=DeviceBrightnessMode mappings=[AUTO="Automatic",MANUAL="Manual"]
                Slider item=DeviceVolume
                Switch item=DeviceBluetooth
                Selection item=DeviceApp mappings=["com.lametric.clock:widgetid"="Clock","com.lametric.countdown:widgetid"="Timer"]
            }
            Frame label="Device Notifications" {
                Switch item=NotifyInfo
                Switch item=NotifyWarning
                Switch item=NotifyAlert
            }
            Frame label="Clock" {
                Switch item=SetAlarmIn1Min
                Selection item=ClockCommand mappings=["disableAlarm"="Disable Alarm"]
            }
            Frame label="Timer" {
                Switch item=Set2MinTimer
                Selection item=TimerCommand mappings=["start"="Start","pause"="Pause","reset"="Reset"]
            }
            Frame label="Radio" {
                Default item=RadioControl
            }
            Frame label="Stopwatch" {
                Selection item=StopwatchCommand mappings=["start"="Start","pause"="Pause","reset"="Reset"]
            }
            Frame label="Weather" {
                Selection item=WeatherCommand mappings=["forecast"="Forecast"]
            }
        }

Rules

Sample rules:

import java.util.Calendar

rule "Notify Info"
    when
        Item NotifyInfo changed to ON
    then
        postUpdate(NotifyInfo, OFF)
        
        logInfo("demo.rules", "Sending info notification")
        sendCommand(DeviceNotifyInfo, "INFO!")
end

rule "Notify Warning"
    when
        Item NotifyWarning changed to ON
    then
        postUpdate(NotifyWarning, OFF)
        
        logInfo("demo.rules", "Sending warning notification")
        sendCommand(DeviceNotifyWarning, "WARNING!")
end

rule "Notify Alert"
    when
        Item NotifyAlert changed to ON
    then
        postUpdate(NotifyAlert, OFF)
        
        logInfo("demo.rules", "Sending alert notification")
        sendCommand(DeviceNotifyAlert, "ALERT!")
end

rule "Set Alarm in 1 Minute"
    when
         Item SetAlarmIn1Min changed to ON
    then
         postUpdate(SetAlarmIn1Min, OFF)
         
         logInfo("demo.rules", "Setting alarm for 1 minute from now")
         
         val cal = Calendar.getInstance()
         cal.add(Calendar.MINUTE, 1)
         sendCommand(ClockSetAlarm, new DateTimeType(cal))
end

rule "Set 2 Minute Timer"
    when
         Item Set2MinTimer changed to ON
    then
         postUpdate(Set2MinTimer, OFF)
         
         logInfo("demo.rules", "Configure timer for 2 minutes without starting")
         sendCommand(TimerDuration, 120)
end