Hm, ok. Some hardware-vendors are replacing the characters for the umlauts like here, maybe this is interesting for you to fix the umlaut problem if the customer is for german market:
incoming character for german device setup (idea):
Any plans for better ROT1 decoding? I assume that DAPNET may play a bigger role in the near future and Openspot is a perfect device for it.
Thanks for your time I really appreciate that.