Update c8y_Availability or c8y_Connection by Rest API

[Weihan.Chen]

Product/components used and version/fix level:

Cumulocity 10.16

Detailed explanation of the problem:

How to update c8y_Availability & c8y_Connection by rest API ?

I have try to put the request with below API, but fail to update the manage object

PUT : {{baseUrl}}/inventory/managedObjects/:id
{
“c8y_Availability”: {
“lastMessage”: “2023-09-07T14:33:58.102+08:00”,
“status”: “AVAILABLE”
},
“c8y_Connection”: {
“status”: “CONNECTED”
}
}

Error messages / full error message screenshot / log file:

Question related to a free trial, or to a production (customer) instance?

[Stefan_Witschel]

You should not & cannot update them yourself because there is some logic implemented behind them which would be inconsistent when updated manually.

https://cumulocity.com/guides/users-guide/device-management/#to-monitor-the-connection-of-a-particular-device
https://cumulocity.com/guides/users-guide/device-management/#to-monitor-the-connection-for-multiple-devices

[Weihan.Chen]

Is there any interface to update these properties ?
As the device/assert are integrated with 3rd party system, the measurements will be pushed to c8y from another system.
The manage object is not connected to C8y directly.

[Christoph_Souris]

As Stefan said, not directly.
The c8y_Availability fragment for example would be updated whenever an event was written for the device.

[Korbinian_Butz]

Both fragments and what’s updating them are also explained in the Device Management Library in docs. See here for c8y_Availability and here for c8y_Connection.