Section 5 Sensor Communication
35
FT205EV Wind Sensors
– User Manual
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5.5 Communication
5.5.1
Conventions used in this manual
All examples of sensor transmitted and received messages are printed in italic courier monospace font, e.g.
$<listenerID>,DFP*<checksum><cr><lf>
Angle brackets are used as placeholders for data (e.g. <wind speed>) or for non-printable ASCII characters (e.g.
<cr> for carriage return).
Figure 26 lists the various special characters and symbols which are used in the examples given in this Handbook.
Symbol
Valid Characters
HEX Values
Definition
a
{A to Z} {0 to 9} {/}
41-5A, 30-39, 2F
Talker/listener address field characters
c
{A to Z} {0 to 9}
41-5A, 30-39
Fixed length field of alpha (upper case only) and
numeric characters
h
{A to F} {0 to 9} {/}
30-39, 41-46, 2F
Checksum field validation characters
s
{ }
20
Space
x
0 to 9
30-39
Fixed length field of numeric characters
x.x
{0 to 9} {.}
30-39, 2E
Fixed point numeric field (i.e. always with leading
and trailing zeros)
{+ -}
2B, 2D
Polarity indicator. Where a value can take on both
positive and negative values a polarity indicator
( or -) is always sent as the first character
in the field. The field length therefore remains
fixed for both positive and negative values.
{$}
24
Start of message delimiter
{*}
2A
Checksum field delimiter
{,}
2C
Field delimiter
-
{-}
2D
Dash
<cr>
0D
Carriage return
Line feed
<lf>
0A
<name>
Placeholder for data
Figure 26: Symbols used in this Handbook
