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Forum Trying to read Neptune water meter
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Forum Thread Details
  • State Not Answered
  • Replies 3 replies
  • Subscribers 359 subscribers
  • Views 2491 views
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  • water_meter
  • neptune
  • protocol
Related

Trying to read Neptune water meter

wheelthru
wheelthru over 13 years ago

Sorry if this isn't the appropriate forum - please move if needed!

 

I'm trying to read the data on the 3-wire interface to a Neptune T10 register encoder in my water meter to integrate it into my home monitoring system.  I believe an external device queries the meter by sending it a series of 5V clock pulses.  The meter extracts enough power from the clock pulses to reply on a data line with the readings of the usage counter "odometer" wheels.  (The 3 wires are brought out to a demarc outside the house.  The "external device" used to be a meter reader person connecting a reading device to the wires; now it's a Neptune R900 transmitter that allows drive-by readings.  I haven't been able to find any device that can read and decode that RF.  The AMRUSB-1 can receive, but not decode it.)

 

I've captured the data, but haven't yet been able to decode it.  Frames on the wire seem to be delimited by unusual transitions every 16th clock pulse.  That leaves 15 clock pulses for data per frame.  I haven't been able to divine the bit/byte/word encoding yet.  Details of my explorations so far (including the data capture) are here http://jimlaurwilliams.org/wordpress/?p=3048.

 

Google has failed me looking for details of this or even the similar Sensus UI-1203 protocol.

 

Anybody have any experience with or knowledge of this protocol?

 

Thanks!

 

Jim

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  • wheelthru
    0 wheelthru over 12 years ago

    Just in case anybody ever finds this looking for info on this protocol, I think I have it.

     

    Details of the investigation are here.

     

    Jim

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  • dale60
    0 dale60 over 4 years ago in reply to wheelthru

    Hi Jim, we're just looking into this interface and just wondering if you have discovered anything new since your last post?

    Dale

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  • dale60
    0 dale60 over 4 years ago in reply to wheelthru

    Hi Jim, we're just looking into this interface and just wondering if you have discovered anything new since your last post?

    Dale

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