For those who are not familiar with morse, a more hardware tinkering free and expensive (and over engineered) solution that might work is 1. Use one of those h

For those who are not familiar with morse, a more hardware tinkering free and expensive (and over engineered) solution that might work is 1. Use one of those handheld landline phones with numbers. 2. Connect it to asterisk via an ata/voip adapter. 3. Configure a dial plan to log dtmf tones 4. Enter message using numberpad like on any old telephone. 5. Translate those numbers to text using t9 or any other custom scheme. If it works, it can do a lot like dial extension 1 for email, 2 for sms to someone else or 3 to control your devices. Keep in mind, setting up dial plans is probably the most challenging part in this whole setup.