Can not generate with Unicode character ¿

[nikakirkitadze]

I am trying to make app which will generate barcode images with special characters like: ¿ ¶ µ
but it is not generating correctly

let unicodeChar: Character = "\u{00B0}"
let encodeType = getBarcodeTypeFor(typeStr: card.barcodeType)
self.barcodeImageView.image = UIImage().toBarcode(string: ";038388(unicodeChar)", encoder: encodeType, inputCorrectionLevel: .Medium)

After barcode scan barcode scanner returns text: ;038388%C2%B0 and I want to return it ;038388¿