An XBee module can be connected to a PandaBoard through a serial connection using UART pins of one of expansion connector of the board. However, XBee modules are powered with 3.3v and board pins works with 1.8v.
Based on a initial SMD design wifly-adapter-board from Dirk Grappendorf, this adapter also solve this converting signals to right levels.
In addition, this design only has one copper layer for easy exposure of PCB, uses non-smd components and adds routes for two (optional) status LEDs.
| XBee Adapter | Expansion Connector "A" (JP3) |
|---|---|
| Pin 1 (GND) | Pin 27 or Pin 28 (GND) |
| Pin 2 (1V8) | Pin 1 (1V8 I/O Power) |
| Pin 3 (TX) | Pin 6 (UART4 Trasmit Data) |
| Pin 4 (5V) | Pin 2 (5Vdc Input Power) |
| Pin 5 (RX) | Pin 8 (UART4 Receive Data |
WARNING!
Be careful connecting 1V8 pin. Any overvoltage leave the board unusable.
More info at PandaBoard-ES Reference Manual, page 43.
Schema
PCB
3D preview
If you want to see the XBee module model in 3D preview, replace zeros by ones in line 37014 of xbee-pandaboard-adapter.kicad_pcb.
$ sed '37014s/0/1/g' -i xbee-pandaboard-adapter.kicad_pcb
Changes:
--- a/xbee-pandaboard-adapter.kicad_pcb
+++ b/xbee-pandaboard-adapter.kicad_pcb
@@ -37011,7 +37011,7 @@
(net 13 "Net-(XB1-Pad20)"))
(model ${KIPRJMOD}/XBee.wrl
(at (xyz 0.04 0 0.05))
- (scale (xyz 0 0 0))
+ (scale (xyz 1 1 1))
(rotate (xyz 270 0 0))
)
(model Socket_Strips.3dshapes/Socket_Strip_Straight_1x10.wrl
- PandaBoard-ES Reference Manual
- wifly-adapter-board by Dirk Grappendorf
- XBee 3D model (XBee.wrl) by Yvon Tollens from kicadlib.org
- Open Source Hardware Logo by Wayne and Layne, LLC.