OWTAP message statistics
Clients send messages to owserver asking for information (from the 1-wire devices, eventually).
The supported message types are essentially essentially directory listings, reads and writes.
To see the relative frequency and data sizes of the different messages, choose Statistics by Message Type from the View menu.
The data here are in "packets" (requests) and total bytes.
PING is the "keep-alive" responses sometimes needed to keep the client from getting bored.
BadHeader would be garbled messages with an incorrect size.
Unknown would occur either if a new message is created that is not recognized by this version of owtap, or a truly bad field value.
ERROR NOP and SIZE are never used. They are either historical, or theorectical choices.