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New profile vs. NUS

Hi, 

I building a gas meter monitor ( peripheral ) that transmit meter reading to the Central. 

The gas meter will be sending to the Central it's ID and meter value ( uint64_t ). 

Now, I'm thinking whether I should : 

Create a dedicated profile ( "Metering Profile" )  -- or --  use NUS service and pass raw buffer with the info ( and then parse it on the central ). 

There are pros and cons to each method, I'd like to hear the community opinion. 

Thanks, 

Ran

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