16 - 40
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Control characters:
CR
– Carriage return (13
dec
; 0x0D)
LF
– Line feed (10
dec
; 0x0A)
STX
– Start of text (2
dec
; 0x02)
ETX
– End of text (3
dec
; 0x03)
Separators:
The semicolon ';' is used as the separator between the individual measured values in the string.
The checksum separator is the multiplication sign '*'.
Checksum:
The checksum is the XOR link of all characters between <STX> and the byte <*>.
The asterisk acts as the separator from the checksum and is no longer included in the checksum.
Status:
The Weather Station includes a status word (32-bit) which supplies information about the status of the
Weather Station. The measured values undergo a plausibility check and are shown in the status word.
Bit number
Function
Description
Bit 0
Precipitation sensor
=1, bedewing protection active.
Bit 1
Precipitation sensor
=1, drying phase of sensor surface.
Bit 2
GPS data
=1, no valid RMC telegram received.
Bit 3
RTC data from GPS
receiver
=1, time from GPS receiver invalid.
Bit 4
ADC values
=1, values from analog-digital-converter invalid.
Bit 5
Air pressure
=1, measured value from air pressure sensor invalid.
Bit 6
Brightness north
=1, measured value from brightness sensor north invalid.
Bit 7
Brightness east
=1, measured value from brightness sensor east invalid.
Bit 8
Brightness south
=1, measured value from brightness sensor south invalid.
Bit 9
Brightness west
=1, measured value from brightness sensor west invalid.
Bit 10
Twilight
=1, measured value for twilight invalid.
Bit 11
Global irradiance
=1, measured value from global irradiance sensor invalid.
Bit 12
Air temperature
=1, measured value from air temperature sensor invalid.
Bit 13
Precipitation
=1, measured value from precipitation sensor invalid.
Bit 14
Wind speed
=1, measured value from wind speed sensor invalid.
Bit 15
Wind direction
=1, measured value from wind direction sensor is invalid.
Bit 16
Humidity sensor
=1, Readings from the humidity sensor invalid (relative humidity,
absolute humidity, dew point temperature).
Bit 17
Watchdog Reset
=1, letzter Neustart durch Watchdog-Reset.
Bit 18
EEPROM Parameters
=1, internal EEPROM parameters invalid.
Bit 19
EEPROM Parameters
=1, internal EEPROM parameters contain the Standard-values.
Bit 20
New FW
=1, last restart was carried out with new firmware.
Table 1 : Status word