P03/3-RS485 basic Weather Station
2
P03/3-RS485 basic Weather Station
• Version: 07.06.2021 • Technical changes and errors excepted. • Elsner Elektronik GmbH • Sohlengrund 16 • 75395 Ostelsheim • Germany • www.elsner-elektronik.de •
Technical Service: +49 (0) 7033 / 30945-250
The connection cable must be plugged in between the cover and circuit board.
2.2.4. PCB Layout
2.2.5. Mounting the sensor
Close the housing by putting the cover back over the bottom part. The cover must
snap in on the left and right with a definite “click”.
To remove it, the sensor can be simply pulled upwards out of the mount, against
the resistance of the fastening.
2.3. Notes on mounting and commissioning
Do not open weather station if water (rain) might ingress: even some drops might
damage the electronic system.
Observe the correct connections. Incorrect connections may destroy the weather
station or connected electronic devices.
Please take care not to damage the temperature sensor (small blank at the bottom
part of the housing.) when mounting the weather station. Please also take care not
to break away or bend the cable connection between the blank and the rain sensor
when connecting the weather station.
Remove all existing protection labels after installation.
The correct wind value may only be supplied about 30 seconds after the supply
voltage has been connected.
2.4. Maintenance of the weather station
WARNING!
Risk of injury caused by components moved automatically!
The automatic control can start system components and place people
in danger.
•
Always isolate the device from the mains for servicing and
cleaning.
The device must regularly be checked for dirt twice a year and cleaned if necessary.
In case of severe dirt, the sensor may not work properly anymore.
ATTENTION
The device can be damaged if water penetrates the housing.
•
Do not clean with high pressure cleaners or steam jets.
3.
Transfer protocol
All characters and/or digits are based on the ASCII standard, i.e. every reading pro-
cessed internally as an integer or float value will always be broken down into and
transferred in its individual ASCII format characters. They must then be reassem-
bled in the reverse process by the receiver.
Transfer rate: 19200 Baud
Data bits: 8
Stop bit: 1
Parity: none
The checksum is calculated along by the receiver by adding all received bytes up
until byte 35 and then compared with the checksum transferred from the P03.
Units:
Temperatures in degrees Celsius
Sun intensity in kilolux
Daylight in Lux
Wind in metres per second
4.
Disposal
After use, the device must be disposed of or recycled in accordance with the legal
regulations. Do not dispose of it with the household waste!
Fig. 12: Overview PCB
1 Connecting cables to rain sensor
in housing cover
2 Socket for connecting plug,
suitable for massive conductors
of up to 0.8 mm²
1: +24 V DC | 2: GND
A: data | B: data
1
2
Fig. 13
Make sure the cover and bottom part
are properly snapped together! This
picture is looking at the closed sensor
from underneath.
Fastening
Fig. 14
Push the housing from above into the
fastened mount. The bumps on the
mount must snap into the rails in the
housing.
Fig. 15
After installation, remove the "distan-
ce" sticker on the top of the cover.
Byte
No
char
Description
1
W
Start of Weather Data
2
AT: sign
Outdoor temperature sign - / +
3
AT: 1st digit
Outdoor temperature 1st digit (tens)
in °C
4
AT: 2nd digit
Outdoor temperature 2nd digit (units)
5
AT: decimal point
Outdoor temperature decimal point
6
AT: 3rd digit
Outdoor temperature 3rd digit (tenths)
7
SoS: 1st digit
Sun South 1st digit (tens)
1-99 klx
8
SoS: 2nd digit
Sun South 2nd digit (units)
9
SoW: 1st digit
Sun West 1st digit (tens)
10
SoW: 2nd digit
Sun West 2nd digit (units)
11
SoO: 1st digit
Sun East1st digit (tens)
12
SoO: 2nd digit
Sun East 2nd digit (units)
13
Twilight
Twilight: J = Yes; N = No
< 10 lx
14
Daylight 0-999Lx
Daylight 1st digit (hundreds)
0-999 lx
15
Daylight 0-999Lx
Daylight 2nd digit (tens)
16
Daylight 0-999Lx
Daylight 3rd digit (units)
17
Wind: 1st digit
Wind 1st digit (tens)
in m/s
18
Wind: 2nd digit
Wind 2nd digit (units)
19
Wind: decimal
point
Wind decimal point
20
Wind: 3rd digit
Wind 3rd digit (tenths)
21
Rain
Rain: J = Yes; N = No
22
Week day: ?
This function is not implemented
23
Date: ?
This function is not implemented
24
Date: ?
This function is not implemented
25
Date: ?
This function is not implemented
26
Date: ?
This function is not implemented
27
Date: ?
This function is not implemented
28
Date: ?
This function is not implemented
29
Time: ?
This function is not implemented
30
Time: ?
This function is not implemented
31
Time: ?
This function is not implemented
32
Time: ?
This function is not implemented
33
Time: ?
This function is not implemented
34
Time: ?
This function is not implemented
35
Summer time: ?
This function is not implemented
36
Checksum: 1st digit
Checksum 1st digit (thousands)
37
Checksum: 2nd
digit
Checksum 2nd digit (hundreds)
38
Checksum: 3rd digit Checksum 3rd digit (tens)
39
Checksum: 4th digit Checksum 4th digit (units)
40
End identifier
end identifier 0x03
