The "type" parameter must be one of the following, depending on the type of variable to set on the SNMP host:
i    INTEGER
u    unsigned INTEGER
t    TIMETICKS
a    IPADDRESS
o    OBJID
s    STRING
x    HEX STRING
d    DECIMAL STRING
If OPAQUE_SPECIAL_TYPES was defined while compiling the SNMP library, the following are also valid:
U    unsigned int64
I    signed int64
F    float
D    double