Pin Connection Recommendations; Rssi Pwm; Sim Card - Digi XB3-C-A2-UT series User Manual

Hardware
Pin Name
18 AD2 / DIO2 / SPI_CLK
AD1 / DIO1 / SPI_ATTN
19
20 AD0 / DIO0

Pin connection recommendations

The recommended minimum pin connections are VCC, GND, DIN, DOUT, RTS, DTR and RESET.
Firmware updates require access to these pins.

RSSI PWM

The XBee Smart Modem features an RSSI/PWM pin (pin 6) that, if enabled, adjusts the PWM output to
indicate the signal strength of the cellular connection. Use
the RSSI pulse width modulation (PWM) output on the pin. If P0 is set to 1, the RSSI/PWM pin outputs a
PWM signal where the frequency is adjusted based on the received signal strength of the cellular
connection.
The RSSI/PWM output is enabled continuously unlike other XBee products where the output is enabled
for a short period of time after each received transmission. If running on the XBIB development board,
DIO10 is connected to the RSSI LEDs, which may be interpreted as follows:
PWM duty cycle
79.39% or more
62.42% to
79.39%
45.45% to
62.42%
Less than
45.45%

SIM card

The XBee Smart Modem uses a 4FF (Nano) size SIM card.
CAUTION! Never insert or remove SIM card while the power is on!
Digi XBee3 Cellular LTE-M Global Smart Modem User Guide
Number of LEDs turned
on
3
2
1
0
Direction Default Description
Either Disabled Analog Input 2 or Digital I/O
2, SPI Clock line
Analog Input 1 or Digital I/O
Either Disabled
1, SPI Attention line output
Either Input Analog Input 0, Digital I/O 0
P0 (DIO10/PWM0 Configuration)
Received signal strength (dBm)
-83 dBm or higher
-93 to -83 dBm
-103 to -93 dBm
Less than -103 dBm, or no cellular network
connection

RSSI PWM

to enable
64