Why my xbee Pro freeze after a relatively long time(1 hour)?

XBee & XBee Gateway
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1

I use Xbee pro in transparent mode just to replace RS-232 wire. Not too much data-transmission is involved. I only use Pin 1:VCC, Pin 2 DOUT, PIN3 DIN, Pin 9 sleep control (set to low level) and Pin 10 GND.

The programme runs well in about one hour, and may freeze some time. And when the freezing happens, I can see a low frequency square waveform from Pin 9.

Could someone tell me what’s wrong and how to solve the issue? Any help will be greatly appreciated.

2

Which XBee module and firmware are you using?

What voltage level does your device run at?

Are you connecting the radio direct or via a level shifter?

What settings have been changed on the radios from their default state?

3

Hi Mvut,
Thank you very much for your answer. Sorry for not making it clear.

  1. the device is Xbee pro 51(That is what I see on the device, I don’t know if I answered this question);
    2)The power supply of the MPU circuit and XBEE is 3.3V; no level converter is employed.
  2. I used a configuration file which was made by someone before me. How can I send you this configuration file?

Best regards,

Frank

4

You can just post the profile. From the sounds of it, you may just be starving the module for power. How much current are you allowing the module to draw?

5

The power supply can offer 800mA current. The MPU and other circuit take far less than 100mA. I think 700mA current is more than enough.

The configuration file looks like this in Notepad:
xbp24-dm_8062.mxi
FE
0
241
8062
0
[A]ID=AB12
[A]CH=F
[A]RR=A
[A]MT=3
[A]BH=0
[A]MR=1
[A]NH=7
[A]NN=3
[A]CE=0
[A]DH=0
[A]DL=FFFF
[A]NI=
[A]NT=82
[A]NO=0
[A]DD=50000
[A]EE=0
[A]BD=3
[A]NB=0
[A]RO=3
[A]D7=1
[A]D6=0
[A]FT=BE
[A]AP=0
[A]AO=0
[A]D0=1
[A]D1=0
[A]D2=0
[A]D3=0
[A]D4=0
[A]D5=1
[A]D8=0
[A]D9=1
[A]P0=1
[A]P1=0
[A]P2=0
[A]M0=0
[A]M1=0
[A]LT=0
[A]RP=28
[A]PR=1FFF
[A]IC=0
[A]IR=0
[A]IF=1
[A]CT=64
[A]GT=3E8
[A]CC=2B
[A]PL=4
[A]WH=0
[A]SO=2
[A]SM=1
[A]SN=1
[A]SP=C8
[A]ST=7D0

Many thanks.

6

I would suggest three things. First, unless you are using Routers to extend the range, I would suggest installing the XBee 802.15.4 firmware on the modules (XBP24). Next, I would make sure that you are employing level shifters between your RS232 device and the 3V XBee. Third, I would suggest not using Pin sleep without using hardware flow control.