Cytron Technical Forum

I have an Arduino Mega 2560 R3 with an IO Expansion Shield (http://www.dfrobot.com/index.php?route= ... uct_id=339) and a XBee Wi-Fi module. I'm trying to connect to the module with X-CTU, but so far I haven't been able to make it connect. As far as I can tell there is no difference in the schematics between the Cytron XBee Shield (http://www.dfrobot.com/image/data/DFR00 ... %20SCH.pdf) and the Mega IO Expansion Shield (http://www.dfrobot.com/image/data/DFR00 ... %20SCH.pdf). Are there any settings inside X-CTU that I need to change to get it to connect properly? Is there anything I need to check on the Mega or IO boards?

i never used xbee wifi before, but used xbee before.

i will like to know do u communicate with your xbee wifi? through UART or SPI.
TRansparent mode or API mode. if u are using transparent mode.

enter the AT command mode by +++ within one second. just dont put any delay between
then start entering your command followed by a CR (0x0D)

remember to read out the response from the Xbee "OK\r" 3 character from the module. every time u send something from UART>

refere product manual
http://www.cytron.com.my/usr_attachment ... Manual.pdf

page 25.

Can show the photo of hardware?

You might want to check the XBee-WiFi module datasheet for any special pin which offer internal pull-up or pull-low.

Also I heard that Xbee-WiFi module consume high current when it is power up, maybe the capacitor for power line need to be bigger.

robosang, I think you are right about needing a bigger capactior. I have the S6 Wi-Fi module, which requires an extra capacitor to handle the in-rush current requirements. I'm sending it back in exchange for the S6B, which doesn't require any board modification. I'll post again when I've tried it out.

What is S6 means? Different series?

S6 is a legacy device. See http://www.digi.com/products/wireless-wired-embedded-solutions/zigbee-rf-modules/point-multipoint-rfmodules/xbee-wi-fi#models

The differences between S6 and S6B are explained here: http://www.digi.com/pdf/xbee-wi-fi-s6%20to-s6b-migration-guide.pdf

I got the S6B in the mail today. I wrote a blank program to the Arduino, connected the 9V adapter, connected the S6B, and I still can't get it to connect in X-CTU. I measured the voltage of the Vcc pin and it reads 3.3V even with the USB cable connected so that is a good thing. I don't know what else to try.

Do you have xbee shield in that case? Why don verify with something you know it is working? BTW, thanks for the explanation.