Hi all,
I'm building a Mango website to monitor some power meter via Ethenet. Below is my data point logging setting.

Today, my server disconnect or the meter disconnect, the server keeps logging last data value (see photo below)

From 3PM to 9PM, the server is disconnected so I expect the value should be 0.

Is there are any setting so I can make sure the logging value is 0 if server/power meter disconnected, therefore I or anyone can realize the abnormal and check the server/meter?

Thank you.

@jared-wiltshire
Thank you for your explaination. Can you be more specific about "datebar.to" and what is it in mango? I mean, there should be something like "myPoint.value" to show/assign a point value or "myDevice.name" to show the device name.

Hello guys,

Is there any method to create a droplist where we can select multiple point with tick boxes to create a graph with it?

Hi guy,

I am reading the document of Mango V3 and V4, I find something like this:

 <ma-point-values point="point1" values="point1Values" from="dateBar.from" to="dateBar.to" rollup="{{dateBar.rollupType}}" rollup-interval="{{dateBar.rollupIntervals}} {{dateBar.rollupIntervalPeriod}}">
    </ma-point-values>

And also like this:

<md-button class="md-raised md-accent md-hue-3" ng-click="dateBar.preset ='DAY_SO_FAR'">
                TODAY
            </md-button>

What is datebar.from and datebar.to call? There should be a list of them, right?
And how can we know about something like 'DAY_SO_FAR'?
I think I read it somewhere. I tried Mango Javascript but I cannot find them.

@robmalone I think I also have to fall back to 3.7.7 because I face point unreliable. Not sure how to fix it. No correct answer in forum yet

@robmalone Can you solve the problem with V4? If you cannot access the system on localhost, please try changing port to 8443, (but don't forget to forward that port).

@cwangv
Can you please be more specific about this: Now, let's create the overview.js and overview.html files, inside pages/overview directory.
If I understand correctly, I have to create a folder named pages, and create another folder named overviews in public folder?
"/public/pages/overview"?

@cwangv said in Update on Tutorial:

@tungthanh500
did you get stuck on the module file path? If you did, that could be due to that is not the right path for V4.
try replacing 'v2' with 'latest' in the path name.

I am lost at Overview part, I don't know where to create pages/overview folder.

Hi guys,
As V4 are released, there are some major changes. Can you update the step on HAVC Dashboard Tutorial? I'm learning and was lost at the second article (https://docs-v4.mango-os.com/hvac-dashboard-development-create-overview-component)

@robmalone Hi, I also face hardship installing v3 so I tried v4. It is much easier. Before installing everything, don't forget to delete the residual folder and file.
In latest v4, env.properties is replace with mango.properties (which is moved to /home/mango)

@craigweb said in Install Mango on DigitalOcean:

tail -f /opt/mango/logs/ma.log

Thank you for your reply. I always try localhost:8080. I also try your command and there is something wrong so the software was terminated.

mango@mango-alpha:~$ tail -f /opt/mango/logs/ma.log
INFO  2020-06-29T23:22:13,491 (com.serotonin.m2m2.Main.loadModules:650) - Loading module 'twilio', v3.7.0 by Infinite Automation Systems Inc. 
INFO  2020-06-29T23:22:13,498 (com.serotonin.m2m2.Main.loadModules:650) - Loading module 'pointLinks', v3.7.1 by Infinite Automation Systems Inc. 
INFO  2020-06-29T23:22:13,504 (com.serotonin.m2m2.Main.loadModules:650) - Loading module 'graphicalViews', v3.7.0 by Infinite Automation Systems Inc. 
INFO  2020-06-29T23:22:13,509 (com.serotonin.m2m2.Main.loadModules:650) - Loading module 'mangoNoSqlDatabase', v3.7.1 by Infinite Automation Systems Inc. 
INFO  2020-06-29T23:22:13,518 (com.serotonin.m2m2.Main.loadModules:650) - Loading module 'egauge', v3.7.0 by Infinite Automation Systems Inc. 
INFO  2020-06-29T23:22:13,522 (com.serotonin.m2m2.Main.loadModules:650) - Loading module 'vmstat', v3.7.0 by Infinite Automation Systems Inc. 
INFO  2020-06-29T23:22:13,527 (com.serotonin.m2m2.Main.loadModules:650) - Loading module 'Haystack', v3.7.0 by Infinite Automation Systems Inc. 
INFO  2020-06-29T23:22:13,533 (com.serotonin.m2m2.Main.loadModules:650) - Loading module 'cloudConnect', v3.7.1 by Infinite Automation Systems Inc. 
INFO  2020-06-29T23:22:13,535 (com.serotonin.m2m2.util.DocumentationManifest.parseManifestFile:60) - Documentation manifest file not found: /opt/mango/web/modules/cloudConnect/web/dox/manifest.xml 
INFO  2020-06-29T23:22:13,539 (com.serotonin.m2m2.Main.loadModules:650) - Loading module 'internal', v3.7.0 by Infinite Automation Systems Inc. 
ERROR 2020-06-29T23:22:15,747 (com.serotonin.m2m2.Main.main:162) - Error during initialization 
java.io.IOException: Failed to bind to 0.0.0.0/0.0.0.0:443
	at org.eclipse.jetty.server.ServerConnector.openAcceptChannel(ServerConnector.java:346) ~[jetty-server-9.4.23.v20191118.jar:9.4.23.v20191118]
	at org.eclipse.jetty.server.ServerConnector.open(ServerConnector.java:307) ~[jetty-server-9.4.23.v20191118.jar:9.4.23.v20191118]
	at org.eclipse.jetty.server.AbstractNetworkConnector.doStart(AbstractNetworkConnector.java:80) ~[jetty-server-9.4.23.v20191118.jar:9.4.23.v20191118]
	at org.eclipse.jetty.server.ServerConnector.doStart(ServerConnector.java:231) ~[jetty-server-9.4.23.v20191118.jar:9.4.23.v20191118]
	at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72) ~[jetty-util-9.4.23.v20191118.jar:9.4.23.v20191118]
	at org.eclipse.jetty.server.Server.doStart(Server.java:385) ~[jetty-server-9.4.23.v20191118.jar:9.4.23.v20191118]
	at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72) ~[jetty-util-9.4.23.v20191118.jar:9.4.23.v20191118]
	at com.serotonin.m2m2.Lifecycle.webServerInitialize(Lifecycle.java:1042) ~[ma-priv-3.7.7.jar:?]
	at com.serotonin.m2m2.Lifecycle.initialize(Lifecycle.java:221) ~[ma-priv-3.7.7.jar:?]
	at com.serotonin.m2m2.Main.main(Main.java:159) ~[ma-priv-3.7.7.jar:?]
Caused by: java.net.BindException: Permission denied
	at sun.nio.ch.Net.bind0(Native Method) ~[?:?]
	at sun.nio.ch.Net.bind(Net.java:479) ~[?:?]
	at sun.nio.ch.Net.bind(Net.java:468) ~[?:?]
	at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:220) ~[?:?]
	at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:88) ~[?:?]
	at org.eclipse.jetty.server.ServerConnector.openAcceptChannel(ServerConnector.java:342) ~[jetty-server-9.4.23.v20191118.jar:9.4.23.v20191118]
	... 9 more
INFO  2020-06-29T23:22:15,747 (com.serotonin.m2m2.Lifecycle.terminate:400) - Mango Lifecycle terminating... 
ERROR 2020-06-29T23:22:15,782 (com.serotonin.m2m2.Lifecycle.terminate:478) - com.serotonin.provider.InputStreamEPollProvider 
com.serotonin.provider.ProviderNotFoundException: com.serotonin.provider.InputStreamEPollProvider
	at com.serotonin.provider.Providers.get(Providers.java:30) ~[mango-3.7.7.jar:?]
	at com.serotonin.provider.Providers.get(Providers.java:20) ~[mango-3.7.7.jar:?]
	at com.serotonin.m2m2.Lifecycle.terminate(Lifecycle.java:473) ~[ma-priv-3.7.7.jar:?]
	at com.serotonin.m2m2.Main.main(Main.java:163) ~[ma-priv-3.7.7.jar:?]
ERROR 2020-06-29T23:22:15,782 (com.serotonin.m2m2.Lifecycle.terminate:486) - com.serotonin.provider.ProcessEPollProvider 
com.serotonin.provider.ProviderNotFoundException: com.serotonin.provider.ProcessEPollProvider
	at com.serotonin.provider.Providers.get(Providers.java:30) ~[mango-3.7.7.jar:?]
	at com.serotonin.provider.Providers.get(Providers.java:20) ~[mango-3.7.7.jar:?]
	at com.serotonin.m2m2.Lifecycle.terminate(Lifecycle.java:481) ~[ma-priv-3.7.7.jar:?]
	at com.serotonin.m2m2.Main.main(Main.java:163) ~[ma-priv-3.7.7.jar:?]
INFO  2020-06-29T23:22:15,783 (com.serotonin.m2m2.Lifecycle.terminate:550) - Mango Lifecycle terminated.