# How to subscribe bus
**URL:** https://discuss.tryton.org/t/how-to-subscribe-bus/6414
**Category:** Developer
**Created:** [August 5, 2023, 10:11am UTC](https://discuss.tryton.org/t/how-to-subscribe-bus/6414 "2023-08-05T10:11:53Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@bala4901](https://discuss.tryton.org/u/bala4901)
#### Post date: [August 5, 2023, 10:11am UTC](https://discuss.tryton.org/t/how-to-subscribe-bus/6414/1 "2023-08-05T10:11:53Z")
Hi,
I would like to send the message to bus to trigger action.
Example: post to bus using channel Reminder.
From the message to filter and select action.
But may i know where in trytond to put the subscribe for the channel?
Please advice
---
### Author:  [@ced](https://discuss.tryton.org/u/ced)
#### Post date: [August 5, 2023, 10:16am UTC](https://discuss.tryton.org/t/how-to-subscribe-bus/6414/2 "2023-08-05T10:16:36Z")
> [@bala4901](#):
>
> I would like to send the message to bus to trigger action.
What message?
Which action?
> [@bala4901](#):
>
> From the message to filter and select action.
Filter what?
---
### Author:  [@bala4901](https://discuss.tryton.org/u/bala4901)
#### Post date: [August 5, 2023, 10:33am UTC](https://discuss.tryton.org/t/how-to-subscribe-bus/6414/3 "2023-08-05T10:33:39Z")
Recently, I am doing a project to read the value from temperature sensor.
I would like to send a bus message to trytond.
```auto
{'channel': 'temperature',
'message': {'sensor': 'temp001', 'temp': 40}
}
```
So from trytond which i would to subscribe bus with channel ‘temperature’ and record to database. But when the temperature is more than 50 then may send the alert to control room.
---
### Author:  [@ced](https://discuss.tryton.org/u/ced)
#### Post date: [August 5, 2023, 10:47am UTC](https://discuss.tryton.org/t/how-to-subscribe-bus/6414/4 "2023-08-05T10:47:47Z")
> [@bala4901](#):
>
> I would like to send a bus message to trytond.
`trytond` does not receive bus message.
> [@bala4901](#):
>
> But when the temperature is more than 50 then may send the alert to control room.
What protocol does the control room support?
---
### Author:  [@bala4901](https://discuss.tryton.org/u/bala4901)
#### Post date: [August 5, 2023, 10:55am UTC](https://discuss.tryton.org/t/how-to-subscribe-bus/6414/5 "2023-08-05T10:55:29Z")
> **[Bus — Tryton server](https://docs.tryton.org/latest/server/ref/bus.html)**
I saw the document trytond listen to the bus message by Post.
Currently I am using ROS2 as the controller and intend using trytond as the logic/business control. Send to control room using webservice
Best regards
---
### Author:  [@ced](https://discuss.tryton.org/u/ced)
#### Post date: [August 5, 2023, 11:18am UTC](https://discuss.tryton.org/t/how-to-subscribe-bus/6414/6 "2023-08-05T11:18:29Z")
> [@bala4901](#):
>
> [Bus — Tryton server](https://docs.tryton.org/projects/server/en/latest/ref/bus.html)
>
> I saw the document trytond listen to the bus message by Post.
This is for long polling request.
But I do not see why you would like to use the notification bus (which is for the clients).
You just have to POST the data using the JSON-RPC request or a [custom entrypoint](https://docs.tryton.org/projects/server/en/latest/topics/user_application.html#user-application).
---
### Author:  [@bala4901](https://discuss.tryton.org/u/bala4901)
#### Post date: [August 5, 2023, 12:42pm UTC](https://discuss.tryton.org/t/how-to-subscribe-bus/6414/7 "2023-08-05T12:42:41Z")
Oh, because I think Bus can use at the server side. Then, if so, i can use it.
Thank you for explanation
---
### Author:  [@system](https://discuss.tryton.org/u/system)
#### Post date: [September 4, 2023, 12:43pm UTC](https://discuss.tryton.org/t/how-to-subscribe-bus/6414/8 "2023-09-04T12:43:21Z")
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