GOlang Datamatrix GS1-128

Question

So i am trying to make datamatrix GS1-128 in golang, I am currently using https://github.com/boombuler/barcode/tree/master/datamatrix, which i edited to add the ability for FNC1 seen from this library https://github.com/huysentruitw/barcoder/tree/develop/src/Barcoder/DataMatrix, Seen here as well https://github.com/huysentruitw/barcoder/blob/develop/src/Barcoder/DataMatrix/DataMatrixEncoder.cs#L65, But when ever i try to use the FNC1 char/rune (232) with my code it comes out with 2 chars à ¨ instead of just 232 so when i try to read the generated data matrix it doesnt read as GS1-128 but just as a regular datamatrix, any tips?