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RN4020 hangs responds with A not AOK

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RAMaston
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2018/08/22 10:39:38 (permalink)
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RN4020 hangs responds with A not AOK

I can send thousands of 'SUW,00004356475F53434D5F315F4254,1900,07D0\r' commands with the expected 'AOK\r\n' response.  About every few minutes the RN4020 responds with only a single 'A', then hangs for about a minute before it becomes responsive again.  Has anyone else seen a hang after getting only a single 'A' (from 'AOK\r\n') back?  I've tried slowing the transmission down to a few ms between bytes, toggling wake lines and still this happens randomly without any recovery fix (other than waiting for it to snap out of its fit).
post edited by RAMaston - 2018/12/21 07:44:31
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    johnszy
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    Re: RN4020 hangs repsonds with A not AOK 2018/08/31 19:22:20 (permalink)
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    It seems to behave a bit like a buffer overrun or something like that.  Have you tried, throttling down the SUW writing frequency. Increase the delay between writes and see if the hang takes longer to occur or better yet, goes away.  
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    RAMaston
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    Re: RN4020 hangs repsonds with A not AOK 2018/12/05 12:58:31 (permalink)
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    I'm back on this project and still have not solved it.  I agree it seems like some sort of buffer overrun or something that hangs the RN4020.  It does not seem to depend on packet burst rate as I've got it to fail at various rates and never at the same byte count or time.
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    plantsplay
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    Re: RN4020 hangs repsonds with A not AOK 2018/12/18 05:49:14 (permalink)
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    We have the same problem. 
    About every few minutes the RN4020 responds with only a single 'A', then hangs for about 30 seconds before it becomes responsive again.
     
    Do you have any solutions?
    #4
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