Maestro M100 2G Instrukcja Użytkownika Pobierz pdf (Strona 47)

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12. I/O TRIGGERED AT COMMAND

This feature makes use of the Maestro 100 Input/Output port as a sensor. If the signal to the port match the pre-defined

condition a stored AT command will be executed.

User can use AT+IOAT command to set the condition and store AT command to be executed.

12.1. Description of the Operation

Wiring Diagram :

1. When the I/O port is connected to battery –ve side,

Switch closed : logic level low

Switch opened : logic level high

2. The switch can be placed as a triggering device, e.g. to detect door opening.

3. According to the setting of AT+IOAT command, the stored AT command will be executed either I/O signal from high to

low, or from low to high :

When set as low-to-high triggering:

I/O port

I/O port voltage

time = T

Start counting time when a

low to high signal

when period of high signal

reach the Threshold value

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 86 87

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Maestro M100 2G Instrukcja Użytkownika Strona 47