„This adapter helps to connect TTL (Transistor-Transistor Logic) level signals to RS232 interface.“
http://www.scienceprog.com/simple-ttl-to-rs232-adapter/
It's not a bug it's a feature – vincit omnia veritas
„This adapter helps to connect TTL (Transistor-Transistor Logic) level signals to RS232 interface.“
http://www.scienceprog.com/simple-ttl-to-rs232-adapter/