astecker commented on issue #930:
URL: https://github.com/apache/plc4x/issues/930#issuecomment-1731198982
As a workaround you could try to write the String as multiple USINT (as i
had problems writing them as an array):
val db = 1000
val lengthOfStringInS7 = 30
val string: String = "abc"
val toWrite =
(""+Char(lengthOfStringInS7)+Char(string.length)+string).take(lengthOfStringInS7+2).toCharArray().mapIndexed{
idx, chr ->
Triple("fancy_field_name_$idx", "${db+idx}:USINT" , chr.code)
}
val writeResponse = with(plcConnection.writeRequestBuilder()) {
toWrite.forEach { (name, fieldQuery, value) ->
addItem(name, fieldQuery, value)
}
build()
}.execute()[5000, TimeUnit.MILLISECONDS]
Code is Kotlin, and it's a stripped excerpt of a larger project, so expect
some errors while substituting variable names. And better lookup the meaning of
the first two bytes. For me it works, but it looks like its not checked by the
S7 when written..?
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