XBIB-CU-TH reference

Secondary USB Connector for direct programming of modules on some XBee units. Flip the Dip switches to the right for I2C access to the board; flip Dip switches to the left to disable I2C access to the board. The USB_P and USB_N lines are always connected to the XBee, regardless of Dip switch setting. USB communications will fail if switches are not in the left position or if XBEE is not configured to enable USB communications. See ATP1 command.

This USB port is not designed to power the module or the board. A USB-C cable or battery port is required to power the board. Cable can be connected at any time, with the XBe powered or unpowered.

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

Large switch controls whether current measure mode is active or inactive. When inactive, current can freely flow to the VCC pin of the XBee. When active, the VCC pin of the XBee is disconnected from the 3.3 V line on the development board. This allows current measurement to be conducted by attaching a current meter across the jumper P10.

If desired, a battery can be attached to provide power to the development board. The voltage can range from 2 V to 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.

Note Power supply outputs 3.3 V to XBee regardless of input voltage as long as current requirement can be met to achieve power consumption of devices.

Provides power and UART communications for the XBEE and development board.

Note Requires USB 3.0 to supply 1 amp of required current. USB 2.0 ports that cannot supply at least 1 amp cannot be used.

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.

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.

Push Dip switches to the right (OFF position) to disconnect USB-to-UART conversion chip from the XBee. This allows UART lines to be individually selected to connect through the breakout connector or the USB-C interface.

This connector attaches I2C-enabled devices to the development board. Note that I2C needs to be available on the XBee in the board for this functionality to be used.

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

Pin2: I2C_SDA/XBee DIO11

Pin3: VCC

Pin4: GND

This part is a Texas Instruments HDC1080 temperature and humidity sensor connected through I2C on XBee pins DIO1 and DIO11. Move both USB direct connect switches to the right (closed position) and disconnect the USB micro port for correct operation of the I2C sensor.

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