Data communication systems and methods and devices for data communication between electronic device with serial data output and client device with audio port

A method for data communication between an electronic device including a serial port and a client device including at least an audio port, comprising:

• providing an interface device to be coupled between the electronic device and the client device and includes a serial port, a signal conversion device and an audio port, wherein the serial port is connected to the serial port of the electronic device and the audio port is connected to the audio port of the client device;
• the electronic device obtaining serial data and outputting the serial data via the serial port;
• and
• the interface device receiving first serial data from the electronic device via the serial port, converting the received first serial data to first audio signals via the signal conversion device, and outputting the first audio signals to the client device via the audio port,
• such that the client device obtains the serial data according to the first audio signals.

An interface device coupled between an electronic device including a serial port and a client device including at least an audio port for data communication between the electronic device and the client device, comprising:

• a serial port connected to the serial port of the electronic device;
• an audio port connected to the audio port of the client device;
• and
• a signal conversion device, performing a serial-to-audio signal conversion for serial data received from the electronic device via the serial port or performing a audio-to-serial signal conversion for audio signals received from the client device via the audio port and outputting the converted data to the client device or the electronic device, respectively.