Digi XBee 3 ZigBee User Manual

I/O support Monitor I/O lines
Digi XBee® 3 Zigbee® RF Module
169
Function Micro Pin SMT Pin TH Pin AT Command
ADC0 31 33 20 D0 (DIO0/AD0/Commissioning Button Configuration)
ADC1 30 32 19 D1 (AD1/DIO1/TH_SPI_ATTN Configuration)
ADC2 29 31 18 D2 (DIO2/AD2/TH_SPI_CLK Configuration)
ADC3 28 30 17 D3 (DIO3/AD3/TH_SPI_SSEL Configuration)
PWM0 7 7 6 P0 (DIO10/RSSI Configuration)
PWM1 8 8 7 P1 (DIO11 Configuration)
AV (Analog Voltage Reference) specifies the analog reference voltage used for the 10-bit ADCs. Analog
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 DH (Destination Address High)andDL
(Destination Address Low).
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 (I/O Sample Rate))
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

Digi XBee 3 ZigBee Specifications

General

Brand	Digi
Model	XBee 3 ZigBee
Category	Control Unit
Language	English