Gocator 2300 & 2880 Series
Protocols • Gocator Protocol • 338
Field Type Offset Description
minor 32s 19 Minor axis length (µm)
minorDecision 8u 23 Minor axis decision.
major 32s 24 Major axis length (µm)
majorDecision 8u 28 Major axis decision.
Health Results
A client can receive health messages from a Gocator sensor by connecting to the Health TCP channel
(port 3194).
The Data channel (port 3196) and the Health channel can be connected at the same time. The sensor
accepts multiple connections on each port. For more information on the Data channel, see Data Results
on page 330.
Messages that are received on the Data and Health channels use a common structure, called Gocator
DataProtocol (GDP). Each GDP message consists of a 6-byte header, containing size and control fields,
followed by a variable-length, message-specific content section. The structure of the GDPmessage is
defined below.
Field Type Offset Description
size 32u 0 Count of bytes in message (including this field).
control 16u 4
Bit 15: Last Message flag
Bits 0-14: Message type identifier.(See individual data result
sections.)
Gocator DataProtocol
GDP messages are always sent in groups. The Last Message flag in the control field is used to indicate the
final message in a group. If there is only one message per group, this bit will be set in each message.
A Health Result contains a single data block for health indicators. Each indicator reports the current
status of some aspect of the sensor system, such as CPU usage or network throughput.
Field Type Offset Description
size 32u 0 Count of bytes in message (including this field).
control 16u 4
Bit 15: Last message flag.
Bits 0-14: Message type identifier. Always 0.
count (C) 32u 6 Count of indicators in this message.
source 8u 10 Source (0 – Main, 1 – Buddy).
reserved[3] 8u 11 Reserved
indicators[C] Indicator 14 Array of indicators (see format below).
Health Result Header
The health indicators block contains a 2 dimensional array of indicator data. Each row in the array has
the following format:
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