I’m trying to use StreamDevice to pass a long string to a controller.  Since it’s much longer than 40 characters, I’m using a waveform.  Here’s the protocol entry (though I’ve tried many other variants of the format specifier):

sety {
#  separator = " ";
 out “Y(%s)";
 in "YOKAY (%s)";
}

Here’s the db entry:
record (waveform, "$(PREFIX):ydata")
{
   field (DTYP, "stream")
   field (INP, "@mems.proto sety $(BUS)")
   field (NELM, 100)
   field (FTVL, "CHAR")
   field (SCAN, Passive)
}

Using an example:
caput -s  mems:ydata “68 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25”

I’ve tried a number of other variants , of course.

What gets sent in this case is “YD”.  So it’s pulling the first number, doing a string to integer conversion, then sending that ascii character (D) and ignoring the rest of the string.

Any ideas?