6
Transfer protocol
Weather Stations P03/3-Modbus(-GPS)
• Version: 07.06.2022 • Errors excepted. Subject to technical changes.
4.2. P03-Modbus output string to the master
Byte
No.
Register
address
Variable
Meaning
0
Slave address
xx
1
Command
04H
Read Input Registers
2
Number of bytes
xx
Master request * 2
3
0
Outdoor temperature
H
with sign, value/10 =
temperature xx.x °C
4
Outdoor temperature
L
5
1
Sun sensor, south
H
1...99 Kilolux
6
Sun sensor, south
L
7
2
Sun sensor, west
H
1...99 Kilolux
8
Sun sensor, west
L
9
3
Sun sensor, east
H
1...99 Kilolux
10
Sun sensor, east
L
11
4
Light
H
0...999 Lux
12
Light
L
13
5
Wind
H
Value/10 gives wind speed in m/s
(metres per second)
14
Wind
L
15
6
GPS / RTC
1 = GPS;
0 = quartz clock 50 ppm
(*)
16
Rain
1 = rain;
0 = no rain
17
7
Day
H
18
Day
L
Date Day
(*)
19
8
Month
H
20
Month
L
Date Month
(*)
21
9
Year
H
22
Year
L
Date Year
(*)
23
10
Hour
H
24
Hour
L
Time Hour
(*)
25
11
Minute
H
26
Minute
L
Time Minute
(*)
27
12
Second
H
28
Second
L
Time Second
(*)
29
13
Azimuth
H
Value/10 = sun position;
angle 0.0 ... 359.9 degrees
(*)
30
Azimuth
L
31
14
Elevation
H
Value/10 = sun position;
height range +/-90.0 degrees
(*)
32
Elevation
L
33
15
Degree of longitude
H
Value/100 +/- xxx.xx°;
+ = east / - = west
(*)
34
Degree of longitude
L
Summary of Contents for 30146
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