Hi - I have a PLC, which I can program, and I want to send data to an Application, which I can't change, on an Android device via Bluetooth. I can send ASCII characters without a problem, but haven't figured out how to send special characters like the up and down arrows. The app needs them, and I it all works with a Bluetooth HID keyboard, but I don't know how to send those over the serial connection. I tried emulating it via Hyperterminal, but the arrow characters get translated to A, B, C, D or [A, [B, [C, [D depending on the terminal mode. Can anyone give me the sequence of bytes I need to send over the serial port to make it look like the arrows keys at the App?