![Free open source serial port sniffer](https://kumkoniak.com/75.jpg)
It includes a Terminal Emulator, a Protocol Analyzer and a serial port monitor to watch for connections. from Nordic pc-nrfutil) is needed to upload sketch via serial port. Serial Port Monitor supports all COM-port types: standard on-board ports, extension board ports, SERIAL-via-USB adapters. Serial Tools is a set of serial port tools for OS X. For Windows and macOS, pre-built executable binaries are Adafruits nrfutil tools. it is also a very good and lightweight tool to monitor your serial ports. It can monitor any software/hardware that works with a serial port, intercept and record all serial input/output control codes (IOCTLs), tracking their full details and parameters. Log serial port data using the freeware tool PuTTYUse PuTTY to debug devices. It can effectively be used for monitoring serial data exchange between serial devices and any Windows application, debugging computer connection with peripheral devices using COM port - such as modem, mini-ATS, projector, etc, for solving problems with serial (RS232/422/485) data communication control networks and devices, for software and hardware testing and much more. With the help of Serial Port Monitor you may debug RS232 ports and any devices using it. You may monitor several ports simultaneously and compare its sessions. It monitors, displays, logs and analyzes all serial port activity in a system. Serial Port Monitor is a professional application for RS232/422/485 COM ports monitoring.
![Free open source serial port sniffer](https://kumkoniak.com/75.jpg)