Xbee Ping Test behaving strangely: Jumper 1 on AXE210 "doesn't work"
Hello,
I have been playing with the Xbees, only some basic range/reliability stuff but I am already stuck.
Please let me explain:
The basic problem that I have is that the Xbees echo back whatever they received regardless of the position of jumper 1 (unless removed completely). When in top position ping shouldn't work but in my case it does at least 90% of the cases (moving the jumper back and forth a bit seems to alleviate the problem slightly, but after a short while ping works again, although the jumper is fittet in the top position)
So, this time around, something that shouldn't work does.
Setup:
-Two XBee connect Boards, jumper 1 top-position on both boards
-one board (A) connected to PC (MAX3232)
-one board (B)with ONLY the XBee module (no MAX3232, no PICAXE)
- if jumper in top position (both boards), I get a successful ping (90% of the time) when I shouldn't.
- if jumper in bottom position same as above but this is as expected.
Some Tests:
Jumper1 is removed
Continuity:
-PIC
only between jumper1-bottom-pin and DIP-18 socket-pin 16 (in7)
-XBee
between Dout and jumper1-bottom-pin
between Din and jumper1-middle-pin
NO cont. between Dout and Din ' as observed => Ping fails when jumper is in this position (removed)
so there is always a connection between Dout and in7
Resistance:
Jumper1-top-pin (top is stereo-connector side)
to socket-pin 3 (serin) : 51K Ohm
to socket-pin 4 (reset): 51K Ohm
to socket-pin 5 (gnd) : 20K Ohm
to socket.pin 13 (Out7) : 10K Ohm (part of voltage divider)
to socket-pin 14 (V+) : 47K Ohm
omitted socket-pins: inf. Ohm
Between the jumper1-pins (any combination) there is no continuity and infinite resistance.
Jumper applied:
Jumper 1 top position (normal position)
Continuity/Resistance:
Dout - out7 : no / inf. Ohm
Dout - in7 : yes / 0 Ohm
Din - out7 : no / 10K Ohm
Din - in7 : no / inf. Ohm
Dout - Din : no / inf. Ohm ' so it SHOULD work correctly (as in no ping in this position, righ?)
Jumper 1 bottom position (ping position)
Continuity/Resistance:
Dout - out7 : no / inf. Ohm
Dout - in7 : yes / 0 Ohm
Din - out7 : no / inf. Ohm
Din - in7 : yes / 0 Ohm
Dout - Din : yes / 0 Ohm ' as expected Dout goes back into Din for ping
Dout/Din/in7 are cont.; out7 is not connected (as I would expect during echo/ping/loop-back).
I set up the Xbees as described in th Rev-Ed AXE210 tutorial; at the moment
they are set to unicast with 16 bit addresses (MY set to 1234 and 4321), but this also happens when set to broadcast.
I preformed a factory reset.
The modules are more than 1 meter apart .
All test where preformed on both connect-boards.
Anybody got an idea why I get the echo regardless of the position of jumper1?
What more test could I preform ?(I have the feeling not all of my test are
terribly useful)
Anything else catches your attention?
Have I overlooked something basic?
Has anybody had similar problems?
Any ideas are highly welcome
Florian
P.S.: I realize my description is not perfectly clear so if you want me to rephrase/clarify something please let me know. The fat-print is the important/paradox part.
Hello,
I have been playing with the Xbees, only some basic range/reliability stuff but I am already stuck.
Please let me explain:
The basic problem that I have is that the Xbees echo back whatever they received regardless of the position of jumper 1 (unless removed completely). When in top position ping shouldn't work but in my case it does at least 90% of the cases (moving the jumper back and forth a bit seems to alleviate the problem slightly, but after a short while ping works again, although the jumper is fittet in the top position)
So, this time around, something that shouldn't work does.
Setup:
-Two XBee connect Boards, jumper 1 top-position on both boards
-one board (A) connected to PC (MAX3232)
-one board (B)with ONLY the XBee module (no MAX3232, no PICAXE)
- if jumper in top position (both boards), I get a successful ping (90% of the time) when I shouldn't.
- if jumper in bottom position same as above but this is as expected.
Some Tests:
Jumper1 is removed
Continuity:
-PIC
only between jumper1-bottom-pin and DIP-18 socket-pin 16 (in7)
-XBee
between Dout and jumper1-bottom-pin
between Din and jumper1-middle-pin
NO cont. between Dout and Din ' as observed => Ping fails when jumper is in this position (removed)
so there is always a connection between Dout and in7
Resistance:
Jumper1-top-pin (top is stereo-connector side)
to socket-pin 3 (serin) : 51K Ohm
to socket-pin 4 (reset): 51K Ohm
to socket-pin 5 (gnd) : 20K Ohm
to socket.pin 13 (Out7) : 10K Ohm (part of voltage divider)
to socket-pin 14 (V+) : 47K Ohm
omitted socket-pins: inf. Ohm
Between the jumper1-pins (any combination) there is no continuity and infinite resistance.
Jumper applied:
Jumper 1 top position (normal position)
Continuity/Resistance:
Dout - out7 : no / inf. Ohm
Dout - in7 : yes / 0 Ohm
Din - out7 : no / 10K Ohm
Din - in7 : no / inf. Ohm
Dout - Din : no / inf. Ohm ' so it SHOULD work correctly (as in no ping in this position, righ?)
Jumper 1 bottom position (ping position)
Continuity/Resistance:
Dout - out7 : no / inf. Ohm
Dout - in7 : yes / 0 Ohm
Din - out7 : no / inf. Ohm
Din - in7 : yes / 0 Ohm
Dout - Din : yes / 0 Ohm ' as expected Dout goes back into Din for ping
Dout/Din/in7 are cont.; out7 is not connected (as I would expect during echo/ping/loop-back).
I set up the Xbees as described in th Rev-Ed AXE210 tutorial; at the moment
they are set to unicast with 16 bit addresses (MY set to 1234 and 4321), but this also happens when set to broadcast.
I preformed a factory reset.
The modules are more than 1 meter apart .
All test where preformed on both connect-boards.
Anybody got an idea why I get the echo regardless of the position of jumper1?
What more test could I preform ?(I have the feeling not all of my test are
terribly useful)
Anything else catches your attention?
Have I overlooked something basic?
Has anybody had similar problems?
Any ideas are highly welcome
Florian
P.S.: I realize my description is not perfectly clear so if you want me to rephrase/clarify something please let me know. The fat-print is the important/paradox part.
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