User manual
Confidential, the whole present document is the sole property of Maestro Wireless Solution Ltd.
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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