What to do when driver has no diagnostics output ?

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Hello everyone,

I use diagnostics in my robot to detect failures and it ś extremely important for us. The problem is that some drivers don't output diagnostics or output imperfect diagnostic data.

For example :

• Our radar don't output any diagnostics.
• Our GPS always output warning because of a bug.

How would you solve these problems ?

I was thinking about subscribing to the radar and GPS topics and generating diagnostics messages myself. It should work but is it fundamentally wrong to do this ?

How would you do it ?

Thanks a lot !