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Serial Port Monitor
Screenshots

Take a look at the screenshots to learn more about the functionality of Serial Port Monitor and Free Serial Port Monitor.
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Serial Port Monitor

Serial Monitor is an ideal solution for discovering and breaking down issues that may occur during an app or a driver development, testing and optimizing COM port devices' performance, and more.
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Free Serial Port Monitor

Free Serial Port Monitor

FREE Serial Monitor lets you capture RS232 data into a text file and test serial communication between COM devices and applications. Download RS232 Logger for free.
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Source code