Domoticz

Open source Home Automation System
https://forum.domoticz.com/

Python SolarEdge modbus script via lan

https://forum.domoticz.com/viewtopic.php?t=31455

Page 2 of 4

Re: Python SolarEdge modbus script via lan

Posted: Thursday 27 February 2020 19:24
by jvdz
I have this which does work for me: ( different first line)

Code: Select all

##!/bin/bash
sunspec_ardexa discover 192.168.0.18 1 > /var/tmp/sunspec.log 2>/var/tmp/sunspec-err.log
Jos

Re: Python SolarEdge modbus script via lan

Posted: Thursday 27 February 2020 19:39
by freijn
Many thanks guys !!!

I have update the inital post with your suggestions.

Besides the crontab..
I fire the script on the update event of my P1. In that same script I collect my Solar and then substract of add the values in order
to calculate the house power consumption.

If you are interested I can share my messy lua script..... :-)

Re: Python SolarEdge modbus script via lan

Posted: Thursday 27 February 2020 20:17
by Piacco
Its working :D

Thanks everybody for your help.

The problem was a wrong path in the crontab this must be:
/usr/local/bin/sunspec_ardexa discover

Thanks
Piacco

Re: Python SolarEdge modbus script via lan

Posted: Thursday 27 February 2020 21:09
by Piacco
freijn wrote: ↑Thursday 27 February 2020 19:39 Many thanks guys !!!

I have update the inital post with your suggestions.

Besides the crontab..
I fire the script on the update event of my P1. In that same script I collect my Solar and then substract of add the values in order
to calculate the house power consumption.

If you are interested I can share my messy lua script..... :-)
I'm always interested in a nice script :D

Re: Python SolarEdge modbus script via lan

Posted: Thursday 27 February 2020 22:39
by telewy
Hi,

I have just finished and everything works nice.

My cron looks like:
*/1 * * * * /usr/local/bin/sunspec_ardexa discover x.y.z.v 1 --port 1502

Thanks guys for sharing scripts and knowledge. Great work :)

Cheers

Re: Python SolarEdge modbus script via lan

Posted: Thursday 05 March 2020 19:53
by gehoel
Hello Together,

I find this an interesting topic.
My end goal is to activate Equipment in my home when my Solar production is positive.
So that I don't have to deliver power to the grid.

I have everything working with the script.
When I try this command: sunspec_ardexa -vv discover xxx.xxx.xxx.xxx 1 is giving me al the data from my inverter.

The part I'm missing is how to get the Items in my devices in Domoticz.
Could somebody explain me.

Greetings,
Bart

Re: Python SolarEdge modbus script via lan

Posted: Thursday 05 March 2020 20:13
by freijn
Hey Gehoel,

Have you installed domo.ini as well ?
( please see description in first post )

Then change the line :

Watts:0 ; Watts inverter Make the 0 the number of the IDX you are using for your sensor.

Now execute :

sunspec_ardexa discover xxx.xxx.xxx.xxx 1 <<<< without the -vv

and your sensor with the defined IDX should get updated with the production watts of your Solar system.

You can put sunspec_ardexa discover xxx.xxx.xxx.xxx 1 in a crontab or do like me.. Fire it when the P1 transmits new data.

Please let me understand where you are lost..... :-)

If that is working you can start writing scripts to act on and off..

Cheers,

Frank

Re: Python SolarEdge modbus script via lan

Posted: Thursday 05 March 2020 21:32
by gehoel
Hello Frank,

I have figured it out.
The part is was missing in your explanation is that I first have to make Virtual Sensors in Domoticz.
After making an Dummy type I was able to add the sensors and then the IDX numbers from Domoticz.

greetings,
Bart

Re: Python SolarEdge modbus script via lan

Posted: Thursday 05 March 2020 22:21
by freijn
gehoel wrote: ↑Thursday 05 March 2020 21:32 Hello Frank,

I have figured it out.
The part is was missing in your explanation is that I first have to make Virtual Sensors in Domoticz.
After making an Dummy type I was able to add the sensors and then the IDX numbers from Domoticz.

greetings,
Bart
Bart,

Point taken and I wrote two lines in the first post about it. Thanks for the reply !

Re: Python SolarEdge modbus script via lan

Posted: Friday 06 March 2020 19:57
by Piacco
freijn wrote: ↑Thursday 27 February 2020 19:39 Many thanks guys !!!

I have update the inital post with your suggestions.

Besides the crontab..
I fire the script on the update event of my P1. In that same script I collect my Solar and then substract of add the values in order
to calculate the house power consumption.

If you are interested I can share my messy lua script..... :-)
Hello Frank,

I'm very interested about your P1 lua script which trigger the sunspec script, is it possible that you share it with us?

Greets,

Piacco

Re: Python SolarEdge modbus script via lan

Posted: Saturday 07 March 2020 9:50
by freijn
Hi Piacco

Not my cleanest script, but should you het going.

Mind the sensors I have used ( you need to change the names !! for your environment )

- powersensor = "Power" << my P1 interface sensor

- solarsensor = "SolarEdge Power Kwh" << The Solar system watt report sensor

- ttidx = otherdevices_idx['PowerConsumption'] << My house consumption sensor

When you deploy it, switch Debug="YES" to see reading results from the script in the logfile.
If all is working , switch to NO.

Needless to mention but you need Solar to see the scrip in action :-)
Let me know if you have questions or troubles....

Code: Select all

----------------------------------------------------------------------------------------------------------
-- Script parameters
----------------------------------------------------------------------------------------------------------
Debug = "NO"                    -- Turn debugging on ("YES") or off ("NO")
----------------------------------------------------------------------------------------------------------
-- Grid Power calculation    GridPower - Solar Power  and store in Sensor
----------------------------------------------------------------------------------------------------------
local solarflag
local var5
local var6
local powercount
local consume
local oldpowerconsume

commandArray = {}

powersensor = "Power"
if (devicechanged[powersensor]) then
    
    if Debug=="YES" then
        print( " ####Power debug device changed: "..devicechanged[powersensor])
    end
    #zon_success=os.execute("sudo /usr/bin/perl /home/pi/sunspec-monitor-master/domosun.pl -z -m 0 -p 502 192.168.1.140 &")
    zon_success=os.execute("sudo /usr/local/bin/sunspec_ardexa discover 192.168.1.140 1 > /dev/null 2>&1 &")
	commandArray['Variable:TEST']=tostring(devicechanged[powersensor])
    var1,var2,var3,var4,var5,var6 = string.match(otherdevices_svalues['Power'], "(%d+%.*%d*);(%d+%.*%d*);(%d+%.*%d*);(%d+%.*%d*);(%d+%.*%d*);(%d+%.*%d*)")
    if Debug=="YES" then
        print( " ####Power debug var5: "..var5)
        print( " ####Power debug var6: "..var6)
    end
    solarflag="0"  
    if (var5 == "0") then 
    -- solar is feeding the grid
        powercount = tonumber(var6)
        solarflag="1"
    else
        powercount = tonumber(var5)
    end
    if Debug=="YES" then
        print( " ####Powercount after solarflag: "..powercount)
        print( " ####solarflag: "..solarflag)
    end
    commandArray['Variable:GridPowerVar']= tostring (powercount)
    commandArray['Variable:SolarPowerFlag']= solarflag

   solarsensor = "SolarEdge Power Kwh"
   Solarvar1, var2 = string.match(otherdevices_svalues[solarsensor], "(%d+%.*%d*);(%d+%.*%d*)")
   Sol = tostring (Solarvar1)
  
  -- solarcount = commandArray['Variable:SolarPowerVar']
  if Debug=="YES" then
    print("####solarcount read from Var : "..Sol)
  end
  
  if ( solarflag == "1") then  
    consume = Solarvar1 - powercount
  else    
    consume = Solarvar1 + powercount
  end 

 if Debug=="YES" then
    print( " ####solarcount : "..Solarvar1)
    print( " ####powercount : "..powercount)
    print( " ####solarflag  : "..solarflag)
    print( " ####consume : "..consume)
 end

 ttidx = otherdevices_idx['PowerConsumption']
 commandArray['UpdateDevice'] = ttidx..'|0|'..consume
 

end 
 
return commandArray

Re: Python SolarEdge modbus script via lan

Posted: Saturday 07 March 2020 10:22
by jvdz
@freijn,

You do realize that you are calculating consume with the Solarvar1 value of the previous run and not the just shelled sunspec_ardexa command? ;)

Jos

Re: Python SolarEdge modbus script via lan

Posted: Saturday 07 March 2020 10:40
by gehoel
Hello,

I have got one problem.
My Watts don't show up in Domoticz.

My ini file looks like:

;The idx numbers of the sensors made in Domoticz
;if idx is set to 0 (zero) it will be ignored
[domoidx]
Amps:40 ; Amps (A) Total Amps
AphA:0 ; Amps PhaseA inverter
AphB:0 ; Amps PhaseB inverter
AphC:0 ; Amps PhaseC inverter
PPVphAB:0 ; Phase Voltage AB inverter
PPVphBC:0 ; Phase Voltage BC inverter
PPVphCA:0 ; Phase Voltage CA inverter
PhVphA:0 ; Phase Voltage AN grid
PhVphB:0 ; Phase Voltage BN grid
PhVphC:0 ; Phase Voltage CN grid
Watts:44 ; Watts inverter
Hz:0 ; Hz Grid
VA:0 ; VA
VAr:0 ; VAr
PF:0 ; Percent
WH:41 ; WattHours (WH)
DCA:0 ; DC Amps
DCV:39 ; DC Voltage
TmpSnk:43 ; Heat Sink Temperature
St:37 ; Operating State

Out come of the script sunspec_ardexa -vv discover 192.168.xx.xxx 1

Amps (A) 11.35 A
Amps PhaseA (AphA) 3.79 A
Amps PhaseB (AphB) 3.76 A
Amps PhaseC (AphC) 3.78 A
Phase Voltage AB (PPVphAB) 399.1 V
Phase Voltage BC (PPVphBC) 399.5 V
Phase Voltage CA (PPVphCA) 399.0 V
Phase Voltage AN (PhVphA) 229.7 V
Phase Voltage BN (PhVphB) 231.1 V
Phase Voltage CN (PhVphC) 230.8 V
Watts (W) 2609.0 W
Hz (Hz) 50.01 Hz
VA (VA) 2619.9 VA
VAr (VAr) -239.0 var
PF (PF) -99.57 Pct
WattHours (WH) 10581497 Wh
DC Amps (DCA) 3.542 A
DC Voltage (DCV) 747.6 V
DC Watts (DCW) 2648.7 W
Heat Sink Temperature (TmpSnk) 30.08 C
Operating State (St) MPPT
Vendor Operating State (StVnd) 0
Vendor Event Bitfield 1 (EvtVnd1) 1
Vendor Event Bitfield 4 (EvtVnd4) 0

So there is production.
But in Domoticz it looks like:

Re: Python SolarEdge modbus script via lan

Posted: Saturday 07 March 2020 10:45
by jvdz
If you are using the last version of the script, which contains the changes I made to my version posted earlier, you don't need a seperate device for W as that is part of the WH device now, since that can/should display both when using the proper dummy device.
Maybe that should be documented as such somewhere.

check this link for the details: https://www.domoticz.com/forum/viewtopi ... 55#p238031

Jos

Re: Python SolarEdge modbus script via lan

Posted: Saturday 07 March 2020 14:49
by freijn
jvdz wrote: ↑Saturday 07 March 2020 10:22 @freijn,

You do realize that you are calculating consume with the Solarvar1 value of the previous run and not the just shelled sunspec_ardexa command? ;)

Jos
Hi Jos,

Honestly, no ! never realized that. :-(

So .... workaround would be , return values of the ardexa command ? Or do you have a better suggestion?
Would a "return commandArray" in between do the job ?

Re: Python SolarEdge modbus script via lan

Posted: Saturday 07 March 2020 14:54
by freijn
jvdz wrote: ↑Saturday 07 March 2020 10:45 you don't need a seperate device for W as that is part of the WH device now,

Jos
Jos, have you played with the json create sensor already ?

like : /json.htm?type=createvirtualsensor&idx=29&sensorname=Energy&sensortype=90

I am thinking , creating a python which creates all sensors required...

Re: Python SolarEdge modbus script via lan

Posted: Saturday 07 March 2020 14:55
by jvdz
There is no easy solution because this command shells another task in the OS:

Code: Select all

zon_success=os.execute("sudo /usr/local/bin/sunspec_ardexa discover 192.168.1.140 1 > /dev/null 2>&1 &")
.. and you specified " &" at the end which means that you are not waiting for that task to finish and immediately returns to the script to continue processing. The sunspec_ardexa command will take several seconds to finish, but even when that would not be the case, the otherdevices_svalues[solarsensor] table values are filled at the time this script is started by the event system so will never contain any updates even when you wait for it!

Jos

Re: Python SolarEdge modbus script via lan

Posted: Saturday 07 March 2020 15:08
by freijn
jvdz wrote: ↑Saturday 07 March 2020 14:55 even when you wait for it!
And what about this? :

In the (python) ardexa script do a json call to the "P1 power" sernsor , grab that info, do the calculation and store it in "consume" sensor with again a json call?

Dirty but.. would that give a better result you think?

Re: Python SolarEdge modbus script via lan

Posted: Saturday 07 March 2020 15:30
by jvdz
That works too, but is still not the exact P1 value at time of calculation. ;)
I guess it all depends on the frequency both the P1 device and the Solar Production data is updated, but there will always be a (little) discrepancy in the time for the values. Just try to make it as short as possible, but it really is only a cosmetics thing as the Total of the counters will always catch up eventually.

Jos

Re: Python SolarEdge modbus script via lan

Posted: Sunday 08 March 2020 10:29
by freijn
Jos,

its all in a 2 sec timeframe but what about this :
  • P1 sends an update
    On the P1 update I do collect the solar numbers
    At the end of the solar script, a python shell is started in the background.
    Python waits 1 sec ( in the background )
    Python grabs json call's the P1 data and the Solar data
    Python updates the House consume sensor.
I know
"3 traps raket"
but would this get closer to calculate values you think?

Cheers,

Frank
All times are UTC+01:00
Page 2 of 4

Powered by phpBB® Forum Software © phpBB Limited