Appendix C. HC2S3 Digital Communications
Command Format:
{
ID
Adr
RDD
Chksum or }
CR
Answer format:
{
ID
Adr
RDD
Chksum or }
CR
The data are returned according to the following structure:
Example
Type
Description
1..3
Byte
Probe type (1= digital probe, 2=analog probe,
3=pressure probe)
1234.56
Float
Relative humidity or analog value
%RH
String Humidity or analog value engineering unit
0..1
Bool
Humidity or analog value alarm (out-of-limits)
+
Char
Humidity or analog value trend (+,-,= or “ “)
1234.56
Float
Temperature value
°C
String Temperature engineering unit
0..1
Bool
Temperature alarm (out-of-limits)
=
Char
Temperature trend (+,-,= or “ “)
Dp
String Calculated parameter type (nc: no calculation, Dp:
dew point, Fp: frost point)
1234.56
Float
Calculated numerical value
°C
String Calculated parameter engineering unit
0..1
Bool
Calculated parameter alarm (out-of-limits)
+
Char
Calculated parameter trend (+,-,= or “ “)
1..255
Byte
Device type (HygroClip, Logger, HF, HM, …)
V1.0
String Firmware version
12345678
String Device serial number
Name
String Device name
000…255
Byte
Alarm Byte: (Bit0=out-of-limits value, Bit5= sensor
quality, Bit6 = humidity simulator, Bit7= temperature
simulator)
Example data returned from the RDD command:
{F00RDD} CR
{F00rdd 001; 4.45;%RH;000;=; 20.07;°C;000;=;nc;---.-;°C;000; ;001;V1.7-
1;0060568338;HC2-S3 ;000;4
C-2
