virtual rs232 port

The RS232 interface is a standard for serial communication jointly developed by the American Association of Electronic Industry (EIA) and bell system, modulation regulator manufacturers and computer terminal manufacturers in 1970. Its full name is "Technical Standard for Serial Binary data exchange interfaces between data terminal devices (DTE) and data communication devices (DCE)", which requires a 25-pin db25 connector, specify the signal content o

This article for the original article, source code for the original code, such as reprint/copy, please in the page/code location clearly marked the original name, author and website, thank you! This software is based on NI-VISA/VISA32 (Virtual instrument software Architecture) of the instrument programming, support RS232, USB, GPIB and LAN communication SCPI instrument programming.First, the software

Learn VC serial port programming, understand the standard of serial protocol is necessary, in fact, the serial port relative to other interfaces (such as USB interface) is very simple. RS232 Serial port Standard is the United States EIA (Electronic Industry Federation) and Bell and other companies developed a communica

Now most of the LG TV comes with a serial port (RS232), in fact, through this serial port can completely manipulate the LG TV, and the function than with the remote control powerful. By using the serial port to send instructions, you can do some simple operation of the TV, such as Switch TV, adjust the volume, Exchange

1 logic level EIA-RS-232C of electrical properties, logic and various signal line functions are defined. On txd and rxd: Logic 1 (Mark) =-3v ~ -15 V Logic 0 (Space) = + 3 ~ + 15 V On the control line such as RTS, CTS, DSR, DTR, and DCD: Effective Signal (on, positive voltage) = + 3v ~ + 15 V Invalid signal (disconnected, off, negative voltage) =-3v ~ -15 V 2. Pin Definition Pin definition symbol 1 Carrier Detection DCD Pin 1 received Line Signal Detector (data carrier dete

Both RS232 and RS422 are widely used asynchronous serial interface standards. Because they are simple to implement and consume less resources in IO ports, it is a good idea to transfer at low speed.The RS232 is a single-ended route with a maximum baud rate of 115200 and a transmission distance of no more than 150 meters, with a logic 1 level of 3 to -15v and a logic 0 level of 3 to 15V.The RS422 is a differ

Windows Driver-Virtual Machine virtual serial port dual-machine debugging, serial port dual-Machine ======================================Copyright Notice====================================== Copyright statement: original articles are not reprinted Please contact me through "contact email (wlsandwho@foxmail.com)" in t

Use virtual machines to implement port forwarding and virtual machine port forwarding 1. application scenarios Break through the Internet restrictions (for example, restrict access to external networks within the company, but open some ports, you can use some open ports to achieve

There may be only one IP outlet, but there are multiple projects, then you need to set up a virtual host based on the port number. Step 1: Check whether the httpd-vhosts.conf is enabled Apache/CONF/httpd. conf file # Virtual hostsInclude conf/extra/httpd-vhosts.conf If it is not enabled, it must be in httpd. CONF file; if enabled, you can set in Apache/CONF/extra

I read a lotArticleAnd writes are very simple (actually very simple :)). A detailed tutorial is provided. 1. Use vspd to connect two virtual serial ports on the PC. I connect com2 and com3. Click ADDR pair. 2. We can see that two virtual serial ports are connected together on virtual ports. 3. The virtual