Thank you so much for your help. I think it won't be easy to let this keyboard communicate with arduino but as you said, the silicone keyboard does certainly have a purpose because in my situation I can´t use a common keyboard because the chance of water damage. It will be better to buy a silicone keyboard made for arduino but I don´t know if they exist??? Do you know a silicone keyboard, which is suitable for arduino?
Thank you so much,
Engin