After some research, it was determined that it would be relatively simple to have an Arduino convert incoming serial data into a parallel output to the printer.

Arduino Serial Plotter Serial Plotter is an amazing tool available in Arduino IDE (from v1.6.6) to visualize the “returned” data beyond just seeing numbers spit out onto the traditional serial monitor ...

They used the webaudio API to send serial data to a remote Arduino. The hack uses a FET, a capacitor, and a few resistors. They didn’t quite build a real modem with the audio.

You can send and receive serial data over WiFi by connecting WiLoader dedicated serial pins to AVR UART pins (RX, TX). Just like other COM ports that Arduino serial monitor uses for communicating ...