When our USB serial cable cannot communicate with the device, what should we do? The easiest way is to eliminate the law and eliminate all the reasons that may affect the failure to communicate. We are now listing them one by one according to the following difficulties:
1. Check if the equipment is operating normally and the wiring is correct;
2. USB serial cable driver is installed, how to view the driver installed? For example: HighTek HU-01 Under the Device Manager, you can see the FT232R USB UART. An exclamation mark indicates that it is not installed.
3. COM port is occupied will also affect the communication, you can change the COM port [COM port change step: find the FT232R USB UART under the device manager, right-click on the properties, find the advanced, you can change the COM port]; you can also go to the list of registration Clear serial configuration file [Clear configuration file step: DOS command line input: regedit, in the following path: DB file in HKEY_LOCAL_MACHIN\SYSTEM\CurrentControlSet\Control\COMNameArbiter]
4. There are many devices default port COM1, COM port can be changed to COM1 when communication is not normal;
5. How to measure whether the USB serial line is normal? Use the serial port tool to measure: 1. HU-01 USB to RS232 serial line, short circuit 2 feet 3 feet can detect whether normal; 2. HU-04 USB to RS485/422 with 2 HU-04 docking, using the serial port tool Can detect whether it is normal;
Fang Xing Yitong is a Shenzhen USB serial cable manufacturer, which produces USB to RS232 serial cable, USB to RS485/422 serial cable, and other products. The quality and price are favorable. Welcome to inquire!
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