Monitor I/O Lines - Digi XBee 3 ZigBee User Manual

I/O support
Function Micro Pin
ADC0 31
ADC1 30
ADC2 29
ADC3 28
PWM0 7
PWM1 8
AV (Analog Voltage Reference)
sample data is represented as a 2-byte value. For a 10-bit ADC, the acceptable range is from 0x0000
to 0x03FF. To convert this value to a useful voltage level, apply the following formula:
ADC / 1023 (vREF) = Voltage
Note ADCs sampled through MicroPython will have 12-bit resolution.
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
(Destination Address
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:
Periodic sample
n
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
l
Digi XBee® 3 Zigbee® RF Module
SMT Pin TH Pin AT Command
33 20 D0 (DIO0/AD0/Commissioning Button Configuration)
32 19 D1 (AD1/DIO1/TH_SPI_ATTN Configuration)
31 18 D2 (DIO2/AD2/TH_SPI_CLK Configuration)
30 17 D3 (DIO3/AD3/TH_SPI_SSEL Configuration)
7 6 P0 (DIO10/RSSI Configuration)
8 7 P1 (DIO11 Configuration)
specifies the analog reference voltage used for the 10-bit ADCs. Analog
Low).
(IR (I/O Sample Rate))
DH (Destination Address High) and DL
Monitor I/O lines
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