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Freeware RS232 port sniffer/monitor softwareHi AllI wonder if anyone knows of one of these? I'm looking for a Windows app which will monitor 'live' traffic from an RS232 port and display it in hex, ascii etc. So far I've downloaded and tried about 20 programs, none of which do what I want.The setup is my PC connected to another serial device and I want to watch the data flow.Most of the programs require a special cable to be made up, but I want to monitor TX and RX on a single port. Those that do allow live monitoring do not seem to work well with the rather unusual settings I'm using which are 9600,7,E,1. The problems they all seem to have is that they do not support 7 bit data and the 8th bit is sometimes erroneously set to 1 so 0x35 becomes 0xB5.
I can of course, work around this, but its prone to errors (mine!).If anyone knows of a package like this, either freeware or low cost shareware I'd be very grateful to hear of it.CheersSteve. Hi,I have been using PortMon.exe avaliable atIt allows you to monitor any RS232 com port, even if it is a USB to RS232 converter cable, I think it can also monitor a printer port. HolyhopeGoodmorning to allI'm try do download a free program like the two that you have linked.But I'm using Windows 7 x64There is one program that able to sniffing data DIRECTALY to the serial port (without any other cables) that is free and work under windows 7 x64?thanksHello.Yes, I know a program that can do this.Look this -Serial port monitor from Eltima. This software is able to sniff and monitor all serial port activity in a system. Works with x64 OS.But you asked for freeware. This soft is not free, but have a trial for two weeks. Trial is a fully functional.
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One of its components is usually a serial protocol analyzer that performs monitoring to diagnose and resolve problems with COM ports. Serial sniffer software is designed to enable users to display the flow of data transmission and save it to a file for later analysis. Our RS232 port sniffer can be used without the need of any programming skills. Serial Bridge ('Protocol Analyzer' in the previous product versions) is used to monitor the serial connection between two distinct serial devices. In this case, the existing connection between devices is broken and both devices are connected to two computer serial ports. The Serial Monitor then establishes a virtual link between them.
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