Configuring the MP Modem to Report GPS and I/O
Data
Typically an analog input device should be connected between
Ground (pin 10) and the input port (Pin 7, 8, 14, or 15).
~
Figure
The analog input ports use a 10‐bit (1024‐step) analog‐to‐ digital converter over a range from 0 to 3.45 VDC, yielding a digital step resolution of 0.0032 V.
Example: analog sensor connections
An I/O cable for an analog sensor requires a wire to one of the analog input pins (such as #7) and one wire to the Ground pin (#10).
I/O configuration using AT or 3G Watcher commands
Once a sensor, gauge, button, or switch is physically connected to the MP modem, the MP modem must be configured to manage the input from, or output to, the device. This configu‐ ration can be done using either AT commands or using 3G Watcher.
For a list of AT commands, please see the MP 3G Modems AT
Command Reference manual (document #2130810).
There are separate windows in 3G Watcher for configuring the analog and digital ports.
|
|
|
|
|
|
|
Rev 1.4 Draft Mar.08 |
|
|
|
|
| 61 |
|
|
|