COSA Xentaur Hygrocontrol Type 72 - Manual (Page 18)

Series 72 Manual page 14
9.1.1. Protocol 1
Transmission of datas will occure every second. Each string consists of 16
ASCII-codes, configurated as follws:
STX DIM SPACE HUMIDITY SPACE TEMPERATURE CR LF
BYTES 1 1 1 5 1 5 1 1
DECIMAL 2 s.b. 32 s.b. 32 13 13 10
HEXADECIMAL 2 s.b. 20 s.b. 20 s.b. OD OA
DIM:
The dimension will be sent as ASCII-Code. The following codes will be found:
ASCII-CODE TEMPERATURE HUMIDITY
1:
°C rF
2: °C RH
3: °C °Ctd
4: °C °Ftd
5: °C g/kg
6: °C g/m 3
A: °F rF
B: °F RH
C: °F °Ctd
D: °F °Ftd
E: °F g/kg
F: °F g/m 3
Temperature:
The Temperature value is sent in ASCII-codes with 1/10° resolution, but without
a decimal point. The highest decimal is sent first. Negative values are
transmitted as their dual-complement (16-Bit) without a sign. Values bigger than
32767 have to be transformed with the following equation:
Temperature = sended value - 65536
Examples:
a) 00213 is to read 21.3 °C (or °F depending on dimension)
b) 65284 is to read -25.2 °C (or °F depending on dimension)
Humidity:
Again this value is sent with resolution of 1/10 %RH (or any other dimension),
without decimal point, as ASCII-code. The highest decimal is sent first.
Dewpoints may have negative values, which are transmitted as their dual-
complement (16-Bit), without a sign, in the same way as the negative
temperatures.
Example: