Tracking with Trimble GPS

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Tracking an object with Trimble GPS

Gofinder (Trimble Trimtrac) GPS-GSM phone module

The GoFinder locator combines GPS and GSM (mobile phone) technology. Using web based mapping, it will provide an affordable method of tracking any object.

Gofinder is particularly portable. It uses four AA batteries which are capable of powering the unit for up to 90 days. Alternatively the Vehicle Adapter Module can be used in high power set-ups. The GPS receiver inside the device is extra sensitive, meaning it will obtain a GPS signal where most GPS receivers would not.

This device is capable of sending an SMS message containing the current latitude and longitude to:

1. any mobile phone and/or

2. displaying the location online, on a web based street map. See sample map screen.

See sample location history screen.

The unit can be set-up to deliver information in one of two ways;

1. Motion Based Polling or

2. Poll on Demand.

After purchasing the unit a SIM card must also be purchased and activated with any GSM (mobile phone) provider. The user then registers on the Gosystem website, and receives an ID and password. The user then pays for Poll Credits using a credit card, and can visit the website anytime for map location and location history of the Gofinder unit. Each Poll Credit costs 33c, (a pre-paid system through the GoFinder website.) Ongoing costs include the sending of an SMS each time positions are transmitted (costs vary depending on the GSM provider.)

How does Motion Based Polling operate?
In the Motion Based set-up, the unit remains dormant until it experiences some form of movement which activates the built-in GPS. The GPS then identifies its location using satellites. This process can take up to five minutes. Once a position is determined the device sends an SMS (provided GSM coverage is adequate) detailing the location to The Web Application. This information could also be sent to a mobile phone. If motion continues, updates will be repeated at pre set intervals of your choice (5, 15, 30 or 60 minutes.) Once motion ceases, a log of the journey can then be reviewed using the Web Application. The Motion Based set-up can be more power efficient, therefore maximizing battery life.

How does Poll on Demand operate?
The Poll on Demand set-up allows you to request the location of the device at any time through the internet. This set-up requires more battery power, as the GPS has to remain on at all times, and it is recommended that the Vehicle Adapter Module be used. Poll on Demand requires two requests to be made through the Web Application and therefore deducts twice as many Poll Credits as the Motion Based set-up.

Gofinder is available now from Johnny Appleseed GPS- $699 includes GST, and insured shipping anywhere in Australia.

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Componentry:
The system is manufactured by Trimble and marketed as the Trimtrac module. It is supplied in standard form with the 4 x AA battery compartment and cover. The dimensions are 144 x 77 x 37 mm.

Trimtrac is the hardware. The Gofinder system utilizes this hardware and combines it with web-based access to mapping, showing streets and other features throughout Australia. You will need to purchase a SIM card from a mobile network providor, without a PIN number. Try 3, Optus, Telstra, or Vodaphone or any other in Australia.

What applications are there?
There are many possibilities. Using the AA battery set, Gofinder can be carried by a person or animal, and the user can keep track. The motion based sensing can be used to alert the user if a vehicle, container or other device begins to move. In this setup, you can purchase the optional 12v wiring set ($99). The Gofinder website keeps a record of previous messages, so you can log on hours later for information.

Is there a warranty?
Gofinder comes with 12 months warranty, and full instructions for set up.

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