XBIB-CU-TH reference

The USB Direct connector allows for direct connection to the cellular module on the XBee. This connection is the fastest method of upgrading the cellular modem firmware and allows for development of applications that directly interface to the cellular modem.

The USB Direct connector is always connected to the pins 7 and 8 of the XBee module. For reliable USB communication to the cellular modem, the dual in-line package (DIP) switches must be in the OFF (left) position, which disconnects pins 7 and 8 of the XBee module from the breakout header and from the inter-integrated circuit (I²C) bus.

To use I²C, the DIP switches must be in the ON (right) position and the USB micro B cable should be disconnected.

Note This USB connector will not power device. Use USB-C to power the device.

WARNING! If the DIP switches are left ON while making a USB Direct connection, the cellular modem may enumerate on a computer, but communication to the modem will be unreliable.

WARNING! USB Direct port should not be connected when used with XBees that do not support USB communications.

The switch allows the XBee VCC pin to disconnected from the 3.3V supplied by the XBIB.

When in the INACTIVE (downward) position, the XBIB powers the XBee normally.

When in the ACTIVE position, power must be delivered via jumper P10.

This allows current measurements to be conducted by attaching a current meter across the jumper P10.

Note The USB-to-serial communications connection may affect this current measurement.

If desired, a battery or other power source can be attached to provide power to the development board. The voltage can range from 2 V to 5.5 V. The positive terminal is on the left.

If the USB-C connector is connected to a computer, the power will be provided through the USB-C connector and not the battery connector.

WARNING! Battery current discharge rating must be enough to support 5 W or more.

WARNING! There is no circuit to prevent over discharge of battery. Battery must contain its own protection circuitry.

WARNING! Move UART switches to the OFF position when using battery or external power or for when the XBee and the USB-C connector is not powering the UART.

The USB to UART converter is powered only via the USB-C connection.

Note While the battery voltage can vary from 2V to 5V, the XBIB-CU-TH will regulate that voltage to 3.3V for the XBee. Lower input voltages will require higher input currents to supply the necessary power to the XBee and any attached devices.

Provides power for the XBee and development board as well as serial communications to the XBee.

Note To run XBee Cellular modules requires connecting this to a USB 3.0 capable port (usually a blue port) due to the power requirements. Connecting to a USB 2.0 port will result in unreliable operation.

Red: UART DOUT (modem sending serial/UART data to host)

Green: UART DIN (modem receiving serial/UART data from host)

White: ON/SLP/DIO9

Blue: Connection Status/DIO5

Yellow: RSSI/PWM0/DIO10

Comm DIO0 Button connects the Commissioning/DIO0 pin to GND when pressed.

Note The XBee Cellular does not implement any commissioning function like other XBees. Connection to the cellular network is automatic when a SIM card is inserted and the modem is powered on.

RESET button resets the XBee module when pressed.

This 40 pin connects to various XBee pins as shown on the silkscreen on the bottom of the board.

See XBIB-C Development Boards for details.

Push DIP switches to the right (OFF position) to disconnect the XBee from the USB-to-serial converter. The USB-to-serial converter should be disconnected from the XBee to use the serial lines on the breakout connector, when taking current measurements, or when powering the XBIB from the Battery Connector.

This connector attaches I²C-enabled devices to the development board. The XBee3 devices all include I²C.

Move both USB direct connect switches to the right (closed position) and disconnect the USB micro port for correct operation of the I²C to connector.

• Pin 1: I²C_CLK/XBee DIO1

• Pin 2: I²C_SDA/XBee DIO11

• Pin 3: VCC

• Pin 4: GND

This part is a Texas Instruments HDC1080 temperature and humidity sensor connected through I²C on XBee pins DIO1 and DIO11.

For correct operation of the I²C sensor, both USB direct connect switches must be to the right (closed position) and be sure to disconnect the USB micro port.

This is the socket for the XBee (through-hole (TH) form factor).

Allows easy access to pins 1 to 20 of the XBee.