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 Posted: Jun 21, 2012 - 11:59 PM |
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Joined: Apr 15, 2009
Posts: 4875
Location: San Jose, CA
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It should be few ms.
Can you try it from HyperTerminal or similar program?
I don't really know why it behaves like this. |
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Posted: Jun 22, 2012 - 12:37 AM |
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Joined: Jun 21, 2012
Posts: 12
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Posted: Jun 22, 2012 - 12:55 AM |
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Joined: Apr 15, 2009
Posts: 4875
Location: San Jose, CA
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| May be you have local echo enabled and module does not receive anything? |
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The opinions and views expressed by me on this forum are my own and do not represent my employer or anyone else that I’m affiliated with.
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Posted: Jun 22, 2012 - 01:04 AM |
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Joined: Jun 21, 2012
Posts: 12
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| How can I check or change it? Is it in configuration of the module or you mean TXD and RXD are connected together somewhere? |
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Posted: Jun 22, 2012 - 01:05 AM |
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Joined: Apr 15, 2009
Posts: 4875
Location: San Jose, CA
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No, module should work fine as is. You can't configure it without getting access first anyway. It should be in the configuration of the terminal program.
BTW, do you see the same characters if you disconnect the module? |
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The opinions and views expressed by me on this forum are my own and do not represent my employer or anyone else that I’m affiliated with.
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Posted: Jun 22, 2012 - 01:12 AM |
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Joined: Jun 21, 2012
Posts: 12
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| No, when module is disconnected there is nothing in receive window. And it's the same when module is connected to FTDI converter but there isn't SerialNet programmed. |
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Posted: Jun 22, 2012 - 01:16 AM |
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Joined: Apr 15, 2009
Posts: 4875
Location: San Jose, CA
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| Do you press <Enter>? Try different settings for End Of Line character, like CR, LF and CR+LF. |
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Posted: Jun 22, 2012 - 01:32 AM |
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Joined: Jun 21, 2012
Posts: 12
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You are the best  So small detail... But in this terminal is written that after pressing <ENTER> there is inserted CR character in the end of sending expression, but it wasn't work. When I send 'AT#013' everything works great. Thanks a lot for help. |
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Posted: Jun 23, 2012 - 03:39 PM |
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Joined: Jun 21, 2012
Posts: 12
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| I've just remembered one more question. Do you know what is the approximate range of ATZB-24-A2? I've looked for this information in the datasheet and some forums but without success. |
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Posted: Jun 23, 2012 - 06:16 PM |
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Joined: Apr 15, 2009
Posts: 4875
Location: San Jose, CA
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| That depends on how you design your board. You can expect anything from 5 to 50 meters. Sometimes even more, but not really reliable and not in all antenna orientations. |
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The opinions and views expressed by me on this forum are my own and do not represent my employer or anyone else that I’m affiliated with.
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Posted: Jun 23, 2012 - 10:32 PM |
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Joined: Jun 21, 2012
Posts: 12
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| I thought so. Ok, thank you very much. |
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Posted: Sep 26, 2012 - 08:48 PM |
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Joined: Jun 21, 2012
Posts: 12
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Hi again.
I have a question about PCB for ATZB-24-A2. My PCB is filled by ground, even in area occupied by the module. I wonder it may influence on the range of the module. Or maybe you have some other tips how can I increase the range? |
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Posted: Sep 26, 2012 - 08:55 PM |
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Joined: Apr 15, 2009
Posts: 4875
Location: San Jose, CA
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There should not be ground plane under the antenna part of the module. That will affect the range (technically you are just shielding the antenna).
Ground plane under the module itself is not recommended, but acceptable.
Generally antenna on ATZB-24-A2 gives better performance if if is located flush with the PCB side (not hanging over from the PCB). |
_________________
The opinions and views expressed by me on this forum are my own and do not represent my employer or anyone else that I’m affiliated with.
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Posted: Sep 26, 2012 - 10:17 PM |
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Joined: Jun 21, 2012
Posts: 12
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| OK, I'll change it. Thanks. |
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Posted: Oct 02, 2012 - 02:38 PM |
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Joined: Jun 21, 2012
Posts: 12
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| It helped a lot. The range is much bigger now. Thanks again |
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