District heating - Reading Kamstrup Multical 401

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jjansen
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Posts: 20
Joined: 17 Oct 2016, 14:20

District heating - Reading Kamstrup Multical 401

#1 Post by jjansen » 16 Mar 2017, 21:21

I have a Kamstrup Multical 401 installed at home as a metering device for my district heating system.
This device is standard equiped with an IR interface in order to extract data.

Based on some Danish forum posts / websites I created a 'sensor' and a ESPEasy plugin in order to get this information into Domoticz.

Plugin: https://github.com/letscontrolit/ESPEas ... mstrup.ino

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Within the ESPEasy interface I convert the Heat value from MJ to kWh. This makes processing in Domoticz easier.
Within Domoticz I use regular RFXmeter counters.


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The ESP-12E is also used to read from my smart-energy meter via the P1-interface

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The proto-PCB is held on it's place with a simple magnet

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IR RX/TX sensor layout/setup based on http://wiki.hal9k.dk/projects/kamstrup
schematic http://wiki.hal9k.dk/_media/projects/ka ... ematic.pdf
software based on http://elektronikforumet.com/forum/view ... =2&t=79853
Last edited by jjansen on 17 Mar 2017, 17:58, edited 1 time in total.

freijn
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Posts: 29
Joined: 28 Jan 2017, 17:48

Re: District heating - Reading Kamstrup Multical 401

#2 Post by freijn » 16 Mar 2017, 22:21

Very interesting sTuff!!

THanks for sharing..

1 single simple question ..... "Normally" the meter is checked once in a year by the provider to be able to send you an invoice.
How often do you interrogate the device ? Are you not afraid draining the battery too quickly?

Greetings

Frank

mrwee
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Posts: 126
Joined: 31 Aug 2016, 12:52

Re: District heating - Reading Kamstrup Multical 401

#3 Post by mrwee » 16 Mar 2017, 22:26

Soooo nice! Any chance of adding support for the IEC 62056-21 protocol? (Iskrameco MT372) :)

jjansen
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Posts: 20
Joined: 17 Oct 2016, 14:20

Re: District heating - Reading Kamstrup Multical 401

#4 Post by jjansen » 17 Mar 2017, 11:20

mrwee wrote:
16 Mar 2017, 22:26
Soooo nice! Any chance of adding support for the IEC 62056-21 protocol? (Iskrameco MT372) :)
I am not familiar with this protocol. But I guess it should not be too difficult...? I cannot do this, because I don't have a IEC 62056-21 compatible device.

freijn wrote:
16 Mar 2017, 22:21
Very interesting sTuff!!

THanks for sharing..

1 single simple question ..... "Normally" the meter is checked once in a year by the provider to be able to send you an invoice.
How often do you interrogate the device ? Are you not afraid draining the battery too quickly?

Greetings

Frank
For now I have set a interval of 5 minutes to generate some data; but this might drain the battery too quickly. My meter is already 12 years old... So maybe close to EOL of the battery.
I will change to every hour of even less.

hotdogg
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Joined: 14 Mar 2018, 12:38

Re: District heating - Reading Kamstrup Multical 401

#5 Post by hotdogg » 14 Mar 2018, 12:40

A bit late to this post - Looks good.

Is there some way to set up a centralised heating thermostat controller with the Multical 401? Tired of individually controlling my radiators! .

charuga
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Posts: 1
Joined: 14 Mar 2019, 06:18

Re: District heating - Reading Kamstrup Multical 401

#6 Post by charuga » 14 Mar 2019, 06:25

I have a plugin problem,

When I connect the optical head to the USB, I'm reading the calorimeter normally,
but it does not show any readings in the espeasy plugin.
in the log writes a timeout ...

I tried with wemos d1 and d1 mini...
Also how to add more variables, such as t1, t2, dif. T

Is there any plugin for 402, 601, 602
their logic for reading is simpler because they use 1200, 8n 2, do not use for request 300, and read 1200 baud.

Please help

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