thingsboard | 开源物联网平台thingsboard源码分析

Not a duplicate of Template tag content is empty - A bug in Angular, while my question is about Vanilla Js.

I am working on a ThingsBoard widget. In the HTML tab, I have this simple template:

I want to run a self managed Thingsboard on AWS (t2.micro).

I have installed Thingsboard CE on a t2.micro AWS instance running Ubuntu 20.04 sever.
I followed the aws setup and Ubuntu install guides(postgresql + built in queue service).

I also set up haproxy using this guide.

I was able to successfully log in to my Thingsboard. I only changed the passwords and checked the basic functionalities, but didn't create any new dashboards or made any modifications.

After this I left the computer on, running Thingsboard. Next day I could not reach Thingsboard and although the AWS instance was running I could not ssh into it anymore. After stopping and starting(reboot didn't work) the instance everything was ok (could ssh and Thingsboard was reachable).

I can reproduce this failure just by leaving the instance on, it seems that after serveral hours (5-8 hrs) Thingsboard(or something else not sure) fails which freezes the whole computer.

I have checked two things:

1. I checked CPU utiization on AWS monitoring. It seems that after some hours there is a big jump in CPU load and then it drops back to almost zero. While Thingsboard is running, it is constant.See printscreen from AWS monitoring

2. I checked the Thingsboard logs (in /var/log/thingsboard): There are some errors, but unfortunately most of the things are not enough for me guess what could be a problem with the fresh installation. Here are some lines from the log:

...

The Docker image for Thingsboard with Cassandra (thingsboard/tb-cassandra) also has a Postgres database to store metadata among other things.

I need to connect to this Postgres database from outside the container with a monitoring and administration tool. For that, I need the user and password that were provided for the database when the image was created, and I couldn't find this information in the Thingsboard documentation. I don't want to change the credentials because that might cause problems with the other components of the Docker container.

Does anybody know this user/password combination?

I'm trying to set up the REST connector for Thingsboard IoT Gateway and getting some errors on initialization. My rest.json config is:

I recently started working with thingsboard in context of my bachelor-thesis. Right know I am trying out different functionalities in order to check which requirements thingsboard already satisfies and which have to be implemented by me.

Within that process I am stuck at the requirement that thingsboard dashboard should give live information about the connectivity status of a registered device (connected, disconnected, active, inactive).

To solve that I've tried out editing the rule chain used by the device profile assigned to the device of interest. Specifically I worked with the message type switch and tried out various action nodes connected to it via ConnectEvent, DisconnectEvent, ActiveEvent and InactiveEvent. What I would like to have is the connectivity status of the device to be stored in an SERVER_SCOPE attribute and then being displayed in the entity widget. All I've achieved is to generate an alarm when disconnected and cleared when (re)connected. I know there is a server side attribute called active that changes true immediately when device connects but it only turns false after the inactivityTimeout expired.

I also checked the ThingsBoard Device Connectivity Status page, the Create Alarm when the Device is offline guide and took long researches but couldn't get it to work.

Do you guys have any solutions or tips for me?

Kind regard.

I send this valid JSON to TB CE edition, and it fails reading it.

Is it possible to somehow serialize current Thingsboard (let's call it TBoard) configuration, save it and than latter load saved configuration on TBoard startup. I am specifically interested in loading device profiles, rule chains, and dashboards. I want to save configuration together with my project in git repository so than latter I could just use docker-compose to start multiple services from project (let's call them sensors) and single TBoard instance with saved configuration which will be used for collecting telemetry from sensors and drawing dashboards. Another reason for saving configuration is what happens if for some reason TBoard container crashes or somehow get corrupted so it can't be started again, would I have to click on the things again in order to create all device profiles, dashboards, configure rule chains ... etc etc ... ?

Given that I have this kind of hierarchy in my Thingsboard:

I am currently trying to mess around with ThingsBoard, and one of the things I am trying to achieve is to show a polygon on the trip animation widget. I have my coordinate values added to it as I would expect to work, but it doesn't seem to.

I have tested the same collection of coordinates on the general 'Latest Values' map widget and it works fine there, but I would really like to visualize the movement of a device between polygons.

Has anyone gotten the polygon working that may be able to advise?

My coordinates field is a timeseries value and in the format [ [ [l1,l2],[l1,l2] ],[ [l1,l2],[l1,l2] ] ,...[ [l1,l2],[l1,l2] ] ]

Does anyone know what I may be doing wrong? Any advice that can be given is greatly appreciated.