Kantronics KPC–3 Plus User Manual
Also see for KPC-3 Plus: User guideUser guideManual
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Contents
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139Other Modes of OperationOther ways of using your TNC are covered in this section.Some of the following modes of operation require special software, so they may not beavailable if you are using standard terminal programs such as HyperTerminal orProcomm Plus.Remote Sensing and ControlYou can use two (or more) packet radio stations, each containing a Kantronics TNC, toimplement remote sensing and/or remote control, as follows:remote control of another TNC: from a local Kantronics TNC-based radiostation, use the MYREMOTE command to establish control of a remoteKantronics TNC-based radio station and issue commands for the remote TNCto carry out. For details, see the Command Reference.sense analog inputs: use the ANALOG command to gather and report thestatus of one or two analog input lines in the remote TNC. Kantronics singleport and multi-port TNCs contain an 8 bit A/D converter and additionalcircuitry that converts the analog voltage presented at two specified inputsinto digital values from 0 to 255. You can then use these digital values(reported in binary) as an approximation of the analog voltage values at thetime the TNC interrogated the analog inputs. For details on the ANALOGcommand, see the Command Reference.Note: As documented in the ANALOG command and the radio port pinspecifications, single port devices and multiport devices use different input lines andports for analog sensing.control output voltages: use the CTRL command to control the voltages onselected output lines in the remote TNC (up to two output lines in single portdevices and four output lines in multi-port devices). Each of these output linescan be set to OPEN (i.e., OFF) or GROUNDED (i.e., ON) by the CTRLcommand. Also, the CTRL command can be used with any or all of theseoutput lines to send a specified number of short ON/OFF pulses (each pulselasting about 100 ms, with a fixed length pause between pulses) or a singlelong (about 1.5 s) ON/OFF pulse. For details on the CTRL command, see theCommand Reference.You can also use the ANALOG and/or CTRL commands, without the REMOTEcommand, to carry out sensing and control functions at a local Kantronics TNC.The following diagram illustrates the use of two Kantronics TNC/radio stations forremote control and sensing. These operations could be carried out manually or via aterminal program running in the computer in the central TNC station. |
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