Device for switching between communication modes

A communication switch device comprising:

• a processor;
• a universal serial bus (USB) communication module comprising:
• a data conversion chipset electrically coupled to the processor;
• and
• a USB interface electrically coupled to the data conversion chipset and configured to be electrically coupled to a first electronic device, wherein the data conversion chipset is configured for transmitting data between the processor and the first electronic device through the USB interface;
• a serial communication module comprising:
• a control chipset electrically coupled to the processor;
• and
• a serial interface electrically coupled to the control chipset and configured to be electrically coupled to a second electronic device, wherein the control chipset is configured for transmitting data between the processor and the second electronic device through the serial interface;
• and
• a control module electrically coupled to the USB communication module and the serial communication module, wherein the control module comprises a field effect transistor (FET), a capacitor, and a first resistor, the first resistor is electrically coupled to ground through the capacitor, and is electrically coupled to a power supply pin of the USB interface, a gate of the FET is electrically coupled to a node between the first resistor and the capacitor, a drain of the FET is electrically coupled to a first power supply, a source of the FET is electrically coupled to a power supply pin of the data conversion chipset, and is electrically coupled to serial communication module;
• wherein when the USB interface is electrically coupled to the first electronic device, the control module outputs a first control signal to the control chipset of the serial communication module, the control chipset of the serial communication module is turned off, and the processor communicates with the first electronic device through the data conversion chipset and the USB interface.