Did the t55 protocol change?

My device sends data with the t55 protocol. When it sends data to the server, gets "OK1" as response.
If it does not get OK1 response tries to reconnect to the server.
I realized that the server does not send OK1 response anymore for last few days.
Is there any change for t55 protocol?

Yes, you need to explicitly enable response in the config now. Check decoder class for the parameter name.

I use the demo server. So, I could not enable the response. I use HTTP functions for my custom made open source device. But, the device does not detect connection problems in suitable time range (3 to 5 mins). How can I get 'OK1' response again?
I and other device users have been adversely affected by this situation.

I have made a change to the code so that it can be configured in device attributes as well. It will be available with next release.

Hi Anton,

We mentioned about OK1 response. Did you make a change for "OK1" response?

We disabled response by default. You can enable it back in the config.

Hi Anton,
How to enable the OK1 response ?

You need to set t55.ack to true.

Thank you