Digi XBee3 802.15.4 User Manual

I/O support Monitor I/O lines
Digi XBee3® 802.15.4 RF Module User Guide
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Example
An ADC value received is 0x01AE; to convert this into a voltage the hexadecimal value is first converted
to decimal (0x01AE = 430). Using the default AV reference of 1.25 V, apply the formula as follows:
430 / 1023 (1.25 V) = 525 mV
Monitor I/O lines
You can monitor pins you configure as digital input, digital output, or analog input and generate I/O
sample data. If you do not define inputs or outputs, no sample data is generated.
Typically, I/O samples are generated by configuring the device to sample I/O pins periodically (based
on a timer) or when a change is detected on one or more digital pins. These samples are always sent
over the air to the destination address specified with DH commandandDL command.
You can also gather sample data using on-demand sampling, which allows you to interrogate the state
of the device's I/O pins by issuing an AT command. You can do this on either a local or remote
devicevia an AT command request.
The three methods to generate sample data are:
n Periodic sample (IR command)
l Periodic sampling based on a timer
l Samples are taken immediately upon wake (excluding pin sleep)
l Sample data is sent toDH+DLdestination address
l Can be used with line passing
l Requires API mode on receiver
n Change detect (IC command)
l Samples are generated when the state of specified digital input pin(s) change
l Sample data is sent toDH+DLdestination address
l Can be used with line passing
l Requires API mode on receiver
n On-demand sample (IS command)
l Immediately query the device’s I/O lines
l Can be issued locally in Command Mode
l Can be issued locally or remotely in API mode
These methods are not mutually exclusive and you can use them in combination with each other.
I/O sample data format
AO determines the format of the incoming and outgoing sample data.
By default,AOis configured to be compatible with legacy devices and outputs a legacy data format
regardless of where the sample packet came from.
Legacy data format
Regardless of how I/O data is generated, the format of the sample data is always represented as a
series of bytes in the following format which is compatible with the S1 802.15.4 and S2C 802.15.4
devices:

Digi XBee3 802.15.4 Specifications

General

Brand	Digi
Model	XBee3 802.15.4
Category	Control Unit
Language	English