7
Transfer protocol
Weather Station P04/3-RS485
• Version: 09.06.2022 • Errors excepted. Subject to technical changes.
4.3. Protocol P04/3-RS485 basic
23
0 … 9
CET date day, tens digit
24
0 … 9
CET date day, units digit
25
0 … 9
CET date month, tens digit
26
0 … 9
CET date month, units digit
27
0 … 9
CET date year, tens digit
28
0 … 9
CET date year, units digit
29
0 … 9
CET time hour, tens digit
30
0 … 9
CET time hour, units digit
31
0 … 9
CET time minute, tens digit
32
0 … 9
CET time minute, units digit
33
0 … 9
CET time second, tens digit
34
0 … 9
CET time second, units digit
35
J / N
Summertime (daylight saving time) J = Yes, N = No
36
0 … 9
Checksum thousands digit
37
0 … 9
Checksum hundreds digit
38
0 … 9
Checksum tens digit
39
0 … 9
Checksum units digit
40
0x03
end identifier
Byte No
Char
Description
1
W
Start of string
2
+ / -
Outdoor temperature in °C, sign
3
0 … 9
Outdoor temperature in °C, tens digit
4
0 … 9
Outdoor temperature in °C, units digit
5
.
Outdoor temperature in °C, decimal point
6
0 … 9
Outdoor temperature in °C, tenths digit
7
0 … 9
Sun south in kLux, tens digit
8
0 … 9
Sun south in kLux, units digit
9
0 … 9
Sun west in kLux, tens digit
10
0 … 9
Sun west in kLux, units digit
11
0 … 9
Sun east in kLux, tens digit
12
0 … 9
Sun east in kLux, units digit
13
J / N
Lux twilight indication
14
0 … 9
Daylight in Lux, hundreds digit
15
0 … 9
Daylight in Lux, tens digit
16
0 … 9
Daylight in Lux, units digit
17
0 … 9
Wind in m/s, tens digit
18
0 … 9
Wind in m/s, units digit
Byte No
Char
Description
