SOMMER SPA - MIO Data Transfer Protocol

User Manual SPA Snow Pack Analyser
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7.2. MIO Protocol
MIO transfer consists of multiple ASCII strings containing four data values. A single string starts with the
start ID „I“ followed by the string ID and system number. The four data values are 4 digits long without a
decimal separator.
Attention:
If a value is negative then the minus sign represents the first of the four digits.
The string finishes with a 4-digit checksum in hex format and the end ID ;
Digits
start ID I
string ID 2
placeholder 2
data value 1 4
data value 2 4
data value 3 4
data value 4 4
check sum / CRC-16 4 hex
end ID ;
Tab. 5: MIO string pattern
Example for a an output:
I000009990999099999990409;
I01008000-002024100000428;
I020004880450-894-9420446;
The first string represents according to Tab. 3 the string "Main results". The significance is as follows:
Digits (decimal separator not
output)
cathegory 1
2
2
4 4 4 4 4 1
meaning
start ID I
string ID 00
placeholder 00
no meaning
ice content 099.9
99.9% (max. value of range)
water content
099.9
99.9% (max. value of range)
snow density 0999
999 kg/m³ (max. value of range)
SWE 9999
9999 mm water column (max. value of range)
Check sum 0409
check sum
end ID ;
example string:
I 00
00
0999
0999
0999
9999
0409
;