I have a form that asked user choosing an id channel (a device), a timestamp and a value.

I would like my application does not record the value for duplicate timestamp but only if the id channel is the same.

If id channel is different, I would like my application records value even timestamp is the same.

In attachments, the 1.png shows the different id channel.

the 2.png shows the first record I made for id channel Z0

the 3.png shows the issue I met : The id channel is different but as the timestamp is the same, it is not possible to submit it.

Is there a way to get round this ?

Thanks.

Regards,

Kevin