also, if the xbee module is moved the signal will be lost at distance larger than 3-4 m and the uart command must be resent again to return the signal .
I read the power level, it was at the highest level. I only changed the data rate to 115200 bit/sec.moreover, I tried xbees at 9600 bps but with same results which the signal of communication was lost at around 4m.

I chenged (MY) of first xbee to 1 and its (DL) to 2 and (MY) of second xbee to 2 and its (DL) to 1 that means short 16- bit unicast addressing. moreover, I increased (RR) retries but it did not work too where the problem still exists

is usually the signal between two xbee modules lost when any one of them is moved? is this normal??

is there any configuration parameter that I should change???
how can I communicate at 100m or even 30m outdoor ??
I don’t know what I should do to keep the signal of communication because I’ll use xbee module for a robot ???
would you help me??
Thanks a lot

What are the ways to turn it off? I don’t have that USB connection on my Xbee Regulated, so I can’t connect it to a PC and use X-CTU

In the worst case scenario, can it work that way as well? I mean I only need the first data packet, right?

It goes like this:
First of all, I need to send a START word, which is ‘FF’(something random I chose) to the robot (well, to the xbee on the robot) , then it sends me ACK, then I send him where to go , for example ‘A3′ , then I receive ACK , then it tells me what he found at that location , so it sends me back another packet , then I send ACK , and now I send him where to go once again and then it’s all over again and again.

Thank you once again! (;

I’m currently finishing my electrical engineering degree project, and what I have left to do is the wireless communication between my robot and the Altera DE2 board. All is implemented by VHDL.

I’m using XBee 1mW Chip Antennas that are connected to Xbee Regulated. At first I had problems sending data from one to another, the received data was messed up and entirely different from what I had sent.
Yesterday ,however, I got it somehow to work. Well,almost. In VHDL code I coded it to send start bit ’0′ , then 8 bits (depending on some switchs on the DE2 board) and stop bit ’1′, after that I tried using some delay, so I just sent 8 bits of ’1′ , and then all over again (start bit,data,stop bit,delay…). Now ,the problem is:
I connected both Xbees to oscilloscope and and what I found out is that the while the reciving Xbee receives that data(including start and stop bits) correctly, it then just repeats this data over and over until I change the data itself (switchs on the DE2 board). Although.. I did notice that the stop bit is 2 bits long, which is strange..
There’s also a delay , or more correctly – they’re not synchronous, But it’s pretty obvious..

Is this how that Xbee works? it ‘saves’ the data received and repeats and over and over until the sent data is changed? Why isn’t the receiving Xbee receving the ‘delay’ I created – the 8 ’1′ bits ?

Thank you.

Did you ever solve your Zigbee (broadcast mode) losing inpuit and output data?

I am trying to use API mode to send AT commands to set four DIO’s on multiple endpoints. The problem is that I need to broadcast one API (Type 17) packet for each DIO pin. I get a bunch of replies (Type 97 Packets), one for eaxch DIO for each endpoint. A lot of packets are getting overwritten in both the TX and RX buffers. Would using CTS and RTS pins between my arduino and the coordinator help me?

I would really appreciate your feedback.

Eric

I am trying to connect XBEE series 1 to connect with microchip PICDEM development board. (http://www.microchipdirect.com/productsearch.aspx?Keywords=DV164136). The other Xbee is connected to the computer using USB.
I connected the pins right, but I am having a hardtime interfacing the two together. basically I am just trying to test it out by sending a message from my computer to show on LCD on the development board. Can you help me regarding codes and connections
.Thanks