COM210

Telephone Modem

Frequently Asked Questions: COM210


  1. How do I use the terminal emulator to set up my COM200 or COM210 using LoggerNet?

    There are several pieces of equipment that you need to make this work correctly: LoggerNet 2.1 or greater installed on your computer, the COM200/COM210, an SC532A, an RS-232 cable, and an SC12 cable.

    The first step is to connect everything together correctly. Use the SC12 cable to connect the SC532A to the COM200/COM210 modem and the RS-232 cable to connect the other side of your SC532A to your computer COM port. Make sure your computer is powered on, and that LoggerNet is up on your screen.

    In LoggerNet, select Setup ComPort - Generic Modem 1 - Generic Modem 2. Set the baud rate to 9600 baud. On Generic Modem 1, set RTS low and DTR high.

    Using the terminal emulator from the tools menu of LoggerNet, select Generic Modem 2, and select open port. Type AT <enter key>. The modem will respond with a zero indicating communications are established.



  2. I am wondering how generic the COM210 modem is? I would like to remotely communicate with an entirely different scientific device (not a Campbell Scientific product). The normal way of interfacing with this product is via a direct RS-232C cable connection from the device to the serial COM port of a computer running application-specific Windows software.

    The COM210 phone modem is not generic. The COM210 and all related telephone modems supplied by Campbell Scientific (CSI) are designed to communicate with Campbell Scientific dataloggers through the CS I/O port. The CS I/O port is not an RS232 port. While one could make the COM210 phone modem work with a non-CSI product, the time and effort required will be significant. Not recommended.


  3. I want to build a point-multipoint network using the RF401 radios with a base and three remote terminals. There is a datalogger at each terminal. Can I use a COM210 modem with the base radio and a remote PC with Loggernet software to call in to the base and access the terminals?

    Yes. We refer to this type of setup as a "phone-to-RF base." At the phone-to-RF base, you'll need a CS I/O null-modem port (CH100 with A100), power supply (BP12 or BP24), the radio (RF401), and the phone modem (COM220). Other items are likely needed, such as an enclosure (ENC12/14) and mounting hardware. The phone-to-RF base can not include a datalogger. For details, see the RF401 user manual, appendix I.




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