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Author Topic: Remote reading my meters  (Read 2096 times)
BruceB
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« on: May 23, 2020, 05:39:48 PM »

I want to automate/remote my meter reading and read on my imac.
 
I have:
-   One Elster 1100, which is the main 3-phase import meter and which has IrDA built-in.
-   One DDS-1Y, which reads the tenants use of electricity as no communication capability beyond pulses.
-   3 x RHI Apator heat meters.  The battery is welded in and the [a] UK distributor now declines to recalibrate at the 10 year point as per the RHI rules.  I intend to replace to match other heat meters.
-   One RHI VHU-20 heat meter.  Has built-in m-bus.
-   One VHU-20 heat meter.  Has built-in m-bus.  Measures tenants renewable heat consumption.
-   2 x Pro1250D 3-phase electricity meters, one a FIT generation meter and one to measure heat pump consumption.

I am happy to proceed slowly and expect that between you, you have already thought this sort of problem through.  I would like to do the first 2 first preferably by accessing through wifi.  Any ideas or recommendations for the bits I need?
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BruceB
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« Reply #1 on: June 04, 2020, 04:05:45 PM »

No replies to date.  Looks like I have to get my head around Arduino as I cannot find what I need on the shelf. No doubt you will tell me if I am going horribly wrong.  How difficult can it be? I did some Fortran, 8080 and 6502 programming in the 70s.
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Countrypaul
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« Reply #2 on: June 04, 2020, 04:35:42 PM »

Playing with a Arduino is good fun and like the 6502 you are working at quite a low level (no OS). You will probably need to learn C/C++ as that is the usual language used with Arduino, but try and stay away from using the heap as that very quickly ensures you run out of memory (being used to a 6502 though, that should be no problem).

Can't help you with the meters you have though, so you will have to fill in the gaps.
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greentangerine
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« Reply #3 on: June 04, 2020, 05:13:59 PM »

Playing with a Arduino is good fun and like the 6502 you are working at quite a low level (no OS). You will probably need to learn C/C++ as that is the usual language used with Arduino, but try and stay away from using the heap as that very quickly ensures you run out of memory (being used to a 6502 though, that should be no problem).

Still have my copy of Zaks' "Programming the 6502" - fond memories of building and then programming my Microtan 65 with a hex keypad and 2KB before expanding it to a heady 16KB.
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Pat_
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« Reply #4 on: June 04, 2020, 06:51:39 PM »

Are the protocols involved available or are they maintained secret to prevent meter fraud? That would be my first question.
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BruceB
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« Reply #5 on: June 06, 2020, 05:17:11 PM »

The meter transmits one way continuously irda to an industry standard (according to its data sheet) so should be readable.
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Pat_
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« Reply #6 on: June 06, 2020, 06:15:15 PM »

Ah thanks. I looked up various parts of IEC 62056. Overall it looked like heavy going, but hopefully you only need a small subset. Good luck with the project!
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