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6.2.2 RS485 Configuration
The ULP STD can be set up by using a special
configuration app made by Calypso Instruments.
In order to use the app, you should download the
configurator from our website at
www.calypsoinstruments.com.
The following can be changed with the configu-
rator:
Change the unit from RS485 to Modbus (or vice-
versa)
Baudrate: Is the number of signal units per
second. A baud can contain several bits.
Data rate: The number of bits that are transmit-
ted per unit time through a digital transmission
system or between two digital devices.
Wind Filter: You can choose between the sensibi-
lity of the wind filter
baudrate:
2400 to 115200 (8n1) bauds
output rate:
0.1 to 20 Hertz (Depends on the filter you select)
output units:
m/sec., knots or km/h
Power consumption:
Ultra-Low-Power (RS485 NMEA0183) : 0,25mA
@5V, 1Hz
ULP STD
User manual
6.2.3 RS485 Sentences
The connection is straightforward with no confi-
guration required in RAW mode configuration.
MWV Wind Speed and Angle
1 2 3 4 5
| | | | |
$--MWV,x.x,a,x.x,a*hh
1) Wind Angle, 0 to 360 degrees
2) Reference, R = Relative, T = True
3) Wind Speed
4) Wind Speed Units, K/M/N
5) Status, A = Data Valid
6) Checksum
By default, the communication parameters are
38400bps, 8N1.
Some examples of sentences are:
$IIMWV,316,R,06.9,N,A*18
$IIMWV,316,R,06.8,N,A*19
In case of ON DEMAND configuration mode, the
sentence received is almost the same, but there
is a need of this sentence for requesting data
every time you ask for data:
$ULPI*00\r\n //I=id node by default
$ULPA*08\r\n
$ULPB*0B\r\n
P1*78\r\n
The received sentence has this structure, slightly
modified:
$IiMWV,x.x,a,x.x,a*hh, being i the node (I,A,B,C,....)
configured.
6.3 UART Wiring, Configuration and Re-
gisters
6.3.1. UART Wiring
UART Output:
White
GND (Power -)
Brown
VCC (Power +)
Yellow
DATA RX / SDA
Green
DATA TX/ SCL
09/14
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