Campbell COM110A, Руководство пользователя

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A-1
Appendix A. Using the COM110A with the
PIN Security Feature Enabled
It is possible to use the COM110A with Campbell Scientific dataloggers with the COM110A’s
PIN (Personal Identification Number) feature enabled. However, this has the following
disadvantages:

If the COM110A loses power momentarily, it will not answer further calls until the
datalogger sends the PIN again as part of the normal program sequence. If the
datalogger is programmed to send the PIN only once (leaving the COM110A permanently
switched on), a datalogger reset would be needed to re-enable the system. If a regular
turn on / turn off sequence is used (as described under ‘Controlling the Power
Consumption of the COM110A’ in Appendix B), the system will be disabled until the next
sequence occurs.

If the COM110A fails to unlock the PIN code, for whatever reason, three times in a row,
the SIM card will be permanently locked. This will require you to contact your airtime
service provider to provide an ‘unlock’ code for the SIM.
A1. Introduction
To operate with the COM110A’s PIN feature enabled, the datalogger must
transmit the command to send the PIN to the COM110A after turning on the
power. For CRBasic dataloggers this is simply done by using serial commands to
send the PIN code after the modem is turned on, see the example below. For
Edlog dataloggers this is done using Instruction P97 ‘Initiate
Telecommunications’ using the ‘Generic Modem’ option. This option was added
in recent releases of the CR510, CR10X and CR23X operating systems – from
versions 1.06, 1.13 and 1.10 (and later) respectively. If you have one of these
dataloggers with an older operating system, you should download the latest
operating system from the Campbell Scientific website.
Users of older dataloggers, e.g. the 21X, CR10 or CR7, should contact Campbell
Scientific to obtain a copy of a manual written for early versions of the M20T
which describes an alternative, but more complicated, way of sending PIN codes
using special cables and Instruction P98, ‘Send Character’.
A2. CRBasic Program Example
This example can be used on the CR800 series. CR1000 and CR3000 dataloggers.
It uses the standard CRBasic serialopen, serialout and serialclose commands to
send out configuration commands to the modem. The example shows using a slow
sequence to sending the command to unlock the PIN immediately after turning on
the modem.
'CR1000 Series Datalogger
'Example program showing how to turn on/off a GSM modem and disable the PIN code
'Also includes the correct sequence to shutdown the modem cleanly before turning
'off the power.
'The modem control is done in a slow sequence to avoid interference with measurements
'Declare Public Variables
'Example:
Public PTemp, batt_volt