Here is one I didn't see listed that I often use for debugging...

printf "0x%*v2.2X\n", ' ', $payload;

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If $payload is several bytes of data, this will print something like:

0x01 02 03 CF

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In reply to Re^3: Printing byte as 2 Hex characters by KevinZwack
in thread Printing byte as 2 Hex characters by ShiningPerl

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