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

摘要

A data communication system including an electronic device including a serial port, a client device including at least an audio port and an interface device is provided. The electronic device is configured to obtain serial data and output the serial data via the serial port. The interface device is coupled between the electronic device and the client device and includes a serial port connected to the serial port of the electronic device, a signal conversion device and an audio port connected to the audio port of the client device, wherein the interface device receives first serial data from the electronic device via the serial port, converts the received first serial data to first audio signals via the signal conversion device, and outputs 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.