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AT Commands Reference Manual - wireless netcontrol GmbH

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A-GPS<br />

Using the read command H24 supports reporting current TTFF Scenario per query request.<br />

Command Type Syntax Response/Action Remarks<br />

Set<br />

<strong>AT</strong>+MGPSTTFF<br />

=<br />

OK<br />

or:<br />

+CME ERROR: <br />

Read <strong>AT</strong>+MGPSTTFF? +MGPSTTFF: <br />

OK<br />

Test <strong>AT</strong>+MGPSTTFF=? +MGPSTTFF: (list of<br />

supporteds,<br />

s<br />

The following table shows the +MGPSTTFF parameters.<br />

Table 3-225: +MGPSTTFF Parameters<br />

<br />

Description<br />

<br />

<br />

1 - exit hot (delete ephemeris)<br />

2 - move to cold (delete assisted data)<br />

1 - Cold Scenario<br />

2 - Warm Scenario<br />

3 - Hot Scenario<br />

Note: The Assisted data (position, almanac and ephemeris) is saved in the NV and used to<br />

improve the TTFF in case of power cycle. The assisted data is maintained in RAM and<br />

saved when H24 is powered down normally; in case of sudden power cut the assisted data<br />

may not be saved.<br />

Example<br />

<strong>AT</strong>+MGPSTTFF?<br />

+MGPSTTFF: 3<br />

OK<br />

// Read TTFF Scenario<br />

// "HOT" Scenario<br />

<strong>AT</strong>+MGPSTTFF=1 // Exit "HOT" Scenario / Delete Ephemeris<br />

OK<br />

<strong>AT</strong>+MGPSTTFF?<br />

+MGPSTTFF: 2<br />

OK<br />

// Read TTFF Scenario<br />

// "WARM" Scenario<br />

<strong>AT</strong>+MGPSTTFF=2 // Move to "COLD" Scenario / Delete Assisted Data<br />

OK<br />

<strong>AT</strong>+MGPSTTFF?<br />

+MGPSTTFF: 1<br />

OK<br />

// Read TTFF Scenario<br />

// "COLD" Scenario<br />

3-360 H24 - <strong>AT</strong> <strong>Commands</strong> <strong>Reference</strong> <strong>Manual</strong> April 15, 2010

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