Accessory or 3rd party product support
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Complete Manual: CTM-200 R2 (Revision 1.4)
18.4
Garmin® Personal Navigation Devices
The CTM-200 supports Garmin® products that support the Fleet Management Interface (FMI). When
connected to the CTM-200 via serial link the CTM-200 manages the local connection between the Garmin®
and the CTM-200 and the wireless link between the CTM-200 and the remote server. The CTM-200 notifies
the remote server when the Garmin is connected or disconnected.
The CTM-200 support for the Garmin® product uses a modification of the standard PAD (Packet Assembly
Disassembly) feature of the CTM-200. Default configuration set by the selecting the Garmin® mode on the
CTM-200 can be over ridden by individual configuration of the CTM-200 PAD settings.
Remote Server < --- > Internet <--
WAN
--> CTM-200 <--
Serial
-->Garmin
Note: The CTM-200 communicates with Garmin® (NUVI) products which support the Garmin FMI interface
and the associated Garmin USB to serial cable.
18.5
Miscellaneous external devices, salt spreader controllers, etc.
In some cases, specialized auxiliary equipment are connected to the serial port(s)/CANBus on the CTM-200.
Output from this equipment can be added as a “message payload” and delivered to the monitoring server.
This allows applications to receive data from the connected devices. The data payload is appended to the
$PGPS report message (114) or as binary payloads. The $PGPS message or binary messages are generated
when the data is received on the CTM-200 serial port either via polling or when data is received by the CTM-
200.
Auxiliary device support is a highly configurable feature of the CTM-200. Parameters such as device name,
leading characters, terminating characters, number of bytes to read, polling or non-polling or whether any
processing of the incoming data is required can be configured.
Example 1:
A Salt spreader controller is connected to the CTM-200, The output from the spreader controller is:
131213141516171819202122232425262728293031
The Corresponding report message:
