48
46
45
53
`Add the two bytes and convert to a single data type
oottte
'Visual Basic routine to convert the data in the return string from a DCP-E device from 2 byte binary to a signed decimal.
`Return true
sData = CSng(HighByte + LowByte)
56
`Extract the data's low byte
51
43
Exit Function
oon
'Return: decimal value
42
44
LowByte = Asc(Mid(ReceiveString, ByteNum + 1, 1))
52
`Shift left
55
N
60
X
ppllliiiccca
Humidity Sensor 4 Time out of limits low byte (minutes)
Humidity Sensor 4 Out of limits state (1 = out of limits)
3/7/2006
A
Degrees °C or °F (0x43 = C, 0x46 = F)
Water Input Time out of limits high byte (minutes)
ee
`Routine failed
58
Water Input State high byte (1 = water present, 0 = water not present, 1000 = loss of power)
Water Input Out of limits state (1 = out of limits)
X
sData = &H10000 - sData
Water Input Time out of limits high byte (minutes)
End Function
Humidity Sensor 4 Reading low byte (relative humidity)
54
`1 on a VM500-5-DCP-E
©2006 Microtechnologies, Inc.
Page 4 of 4
`Set return value
X
End If
A
aatttiiio
On Error GoTo ConvertError
X
Function ConvertBytesToDecimal(ByRef ReceiveString$, ByRef ByteNum%, ByRef ReturnValue!) As Boolean
47
ConvertBytesToDecimal = False
`Exit function
ConvertError:
`If data is negative, multiply by -1
X
Ap
HighByte = Asc(Mid(ReceiveString, ByteNum, 1))
X
Revision 1.1
HighByte = HighByte * &H100
'Pass in: string containing data from DCP-E, the high byte number of the data of interest. For example, pass in 5 for Temperature Sensor
Reading values from a VM500 unit with DCP-E
'Check for negative temperature
Water Input State low byte
59
sData = sData * -1
Humidity Sensor 4 Time out of limits high byte (minutes)
57
X
nn N
49
41
ppp
ConvertBytesToDecimal = True
'
Dim sData!, HighByte&, LowByte&
If (sData >= &H1000) Then
`Extract the data's highbyte
X
50
ReturnValue = sData
X
No
X
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