[solved]How to use an power meter connected via S0?

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Hello

This is my first post in this forum…

I have an B+G E-Tech 1Ph WSZ

DRS155D

1000 Imp/kWh

The DRS155D is connected to my RasPi GPIO and I can count the impulse via wiringPi.
Works fine. I’m free to define my own logfile.
But now i would like to integrate it into pimatic.

Can any body give me a hint how to connect the device with pimatic?

first of all welcome to pimatic
if you are already having a logfile, then you should use the logreader for an integration i suggest.
how does your log look like?
how do you count the pulses (python script, daemonized script etc…)

You should be able to write a plugin which does the same with https://www.npmjs.com/package/onoff which also is used by the pimatic GPIO plugin.

I have written my tool in C.
I have never written something in node.js
maybe i will give it a try.

I think this will be a good startpoint:
https://github.com/fivdi/onoff/blob/master/examples/wait-for-interrupt.js

My current logfile looks like this example (just my laptop and a lamp):

cat /var/log/power_2016_6_16

date |epoch (msec) |timediff |cnt |power(s)|power(h)
08:39:28 15.06.2016|1465972768303| 522340716| 3|0.001914|6.892053
…
19:43:55 15.06.2016|1466012635159| 521537899| 79|0.001917|6.902662
19:52:45 15.06.2016|1466013165206| 530047120| 80|0.001887|6.791849
20:01:30 15.06.2016|1466013690850| 525643363| 81|0.001902|6.848750
20:08:12 15.06.2016|1466014092465| 401614781| 82|0.002490|8.963814
20:09:40 15.06.2016|1466014180656| 88191010| 83|0.011339|40.820487
20:11:06 15.06.2016|1466014266344| 85688753| 84|0.011670|42.012515
20:12:39 15.06.2016|1466014359541| 93196898| 85|0.010730|38.627895
20:14:29 15.06.2016|1466014469555| 110013776| 86|0.009090|32.723175
20:15:54 15.06.2016|1466014554242| 84687302| 87|0.011808|42.509324
20:17:25 15.06.2016|1466014645937| 91695072| 88|0.010906|39.260561
20:19:01 15.06.2016|1466014741737| 95799269| 89|0.010438|37.578575
20:20:19 15.06.2016|1466014819417| 77680167| 90|0.012873|46.343876
20:21:39 15.06.2016|1466014899699| 80282613| 91|0.012456|44.841590
20:23:08 15.06.2016|1466014988892| 89192063| 92|0.011212|40.362336
20:31:00 15.06.2016|1466015460277| 471385276| 93|0.002121|7.637065
20:39:48 15.06.2016|1466015988526| 528248856| 94|0.001893|6.814970
20:45:00 15.06.2016|1466016300952| 312426152| 95|0.003201|11.522723
20:46:22 15.06.2016|1466016382437| 81485550| 96|0.012272|44.179612
…
23:20:31 15.06.2016|1466025631550| 521237841| 157|0.001919|6.906636

will the logreader monitor the logfile and calc his own timestamp on changes or can he take my timestamps?
If my consume of power is very high, then i got more then one line in my logfile.

The log reader watches the log and will be renewed as soon as the log file changes. I will have a look l8r for a sample.
Could you please tell me what the values are standing for? There is no “headline” or legend.

Most of the values are double and can be calculated.

date               |epoch (msec) |timediff  |cnt |power(s)|power(h)
08:39:28 15.06.2016|1465972768303| 522340716| 3  |0.001914|6.892053

date=just for better read the logfile
epoch=unix time stamp in millisec
timediff= diff to last timestamp
cnt= impuls counter from the start
power(s) = Watt per sec
power(h) = power(s)*3600 for one hour

ok, I would now try to create a logreader who will show the cnt, power s and power h since the other information are not really neccesary. or are the time stamps relevant for pimatic?! guess not, since the calculation is done by your script.

ok so what i did now is the following

for that i created a logreader device BUT if possible you should alter your logfile output like follows
19:43:55 15.06.2016|1466012635159| 521537899|c: 79|s: 0.005917|h: 6.902662
the logreader will look for c / s / h and will take over the value. since I have set a unit kW and kWh the logreader rounds the values accordingly.

the logreader device looks like that

    {
      "id": "pulsecounter2",
      "name": "Pulsecounter",
      "class": "LogWatcher",
      "file": "/home/pi/pulse.log",
      "attributes": [
        {
          "name": "c",
          "type": "number",
	  "unit": "kW"
        },	  
        {
          "name": "s",
          "type": "number",
	  "unit": "kWh"
        },
	{
          "name": "h",
          "type": "number",
	  "unit": "kWh"
        }		
      ],
      "lines": [
        {
          "match": "c: ([0-9]\\w+)",
          "c": "$1"
        },
	{
          "match": "s: ([0-9].[0-9]\\w+)",
          "s": "$1"
        },
        {
          "match": "h: ([0-9].[0-9]\\w+)",
          "h": "$1"
        }
      ]
    },

altering your logfile for getting a correct match is much easier i guess then creating a complicated regex with exclusions etc …

it seem to work but i’m not satisfied with my own data.
I must rethink my logfile to fit the graph

ok, now you know how to use the logreader device it should not be of any big problem to adapt the logfile to pimatic I guess.
if you still have questions don’t hestiate to ask on the forum
I’ll mark this threat as solved but it stays open for further reference.
cheers