Rest API JSON POST script needed

[mgerhard74]

I want to control a Hoymiles microinverter (HM-800) with a Lua script, because it runs more often than a dzVents script. A special hardware Ahoy DTU in between domoticz and the microinverter.

I want to send a Json string to a specific url.
As in https://github.com/lumapu/ahoy/blob/main/User_Manual.md described, i want to send

Code: Select all

{
    "id": 0,
    "cmd": "limit_persistent_absolute",
    "val": 50
}

to my inverter http://ip-adress/api

Background: LiPoFe4 batteries supply the microinverter at night, i want to regulate the inverter power to the actual power use of our house.

[waltervl]

Don't have the answer for Lua but why do you think a Lua script runs more often then a dzvents script? A dzvents script can run every minute and even more if you do some tricks in the scripts.
Edit: see for example viewtopic.php?p=294493

[mgerhard74]

OK, also dzvents scipts are welcome.

[waltervl]

Here you go:
https://domoticz.com/forum/viewtopic.php?t=28493
viewtopic.php?t=30457

[niekniek89]

Hello @mgerhard74

did you manage to read the ahoydtu with domoticz yet?
I also have an ahoydtu since 2 weeks, but would like to have the logging in domoticz.

[mgerhard74]

Hi,
i tryed a LUA, but i have a error in xml parsing.
Create a new sensor:
http://[DOMOTICZ-IP]:8080/json.htm?type=createvirtualsensor&idx=4&sensorname=Hoymiles&sensortype=248
Put in the DeviceIDx (here: 141) in the Lua code:

Code: Select all

JSON = (loadfile "/home/pi/domoticz/scripts/lua/JSON.lua")()
commandArray = {}
    jsondata    = assert(io.popen('curl "http://[AHOY-DTU-IP]/api/live"'))
    device = jsondata:read('*all')
    jsondata:close()
    data = JSON:decode(device) 
    
    if (data ~= nil) then
        commandArray[1] = {['UpdateDevice'] = 141 .. "|0|" ..tonumber(data['inverter'][0]['ch'][0][2])}
    else
        commandArray[1] = {['UpdateDevice'] = 141 .. "|0|" .. 0 }
    end
return commandArray

The script has still an error in data['inverter'][0]['ch'][0][2] ... but i cant fix it....

Gerhard

Hello @mgerhard74

did you manage to read the ahoydtu with domoticz yet?
I also have an ahoydtu since 2 weeks, but would like to have the logging in domoticz.

[niekniek89]

Hello,

sorry it hasn't worked yet.
I'm also still working on getting the data into domoticz.
I still can't do this either.

[mgerhard74]

Hello,

sorry it hasn't worked yet.
I'm also still working on getting the data into domoticz.
I still can't do this either.

Please look at viewtopic.php?t=39976
lg
Gerhard

[niekniek89]

Hello,

look, that looks good!
Do I need to apply my own inverter name somewhere in your script?
and what did you have to create in domoticz itself? (add hardware)?
is it also possible to get the yield day per panel in domoticz?

[mgerhard74]

No, the first inverter added to Ahoy dtu has number "0" - in this case do no edits in the script.
No extra hardware needed. With that url in your brower you add a device "Hoymiles":
http://[ip of domoticz]:8080/json.htm?type=createvirtualsensor&idx=4&sensorname=HOYMILES&sensortype=248
Yield of day is also possible - study the Ahoy DTU api and modify the script.

Gerhard

[niekniek89]

Hello,

thanks for your help.
I created a sensor using the URL.
however, it stays gray in Domoticz, and doesn't do much.

do I have to put the script somewhere, and create hardware?
I don't think the sensor alone is enough.

[mgerhard74]

You must change a few things in the script
viewtopic.php?t=39976
to "fit" your environment:
Change 10.0.0.156 to the IP of your Ahoy dtu
Change in the line with "commandArray[1]=..." the "141" to the id of your HOYMILES sensor.

[niekniek89]

thanks for your help.
do I have to create hardware myself?
an HTTP/HTTPS poller?

when I adjust the script, to the id of the sensor, it still remains gray.

[mgerhard74]

Hello,
i dont understand your question. The only device you must create is with one http call - i think you have the device created.
Your Ahoy dtu is running? In the same IP area of domoticz? In Ahoy dtu you add at least one Hoymiles inverter, the first has number 0.
Do you have errors in domoticz log concerning this hoymiles script?

[niekniek89]

i have done the following steps:

Step 1: http://[ip of domoticz]:8080/json.htm?type=createvirtualsensor&idx=4&sensorname=HOYMILES&sensortype=248
step 2: place the script within domoticz, within the correct folder and change the id's.

after this I also see the hoymiles sensor within domoticz, but it remains gray.

do I have to arrange something for the script within domoticz?
or do I just have to put it in a folder, and the script will be started automatically?

[waltervl]

Be sure the IDX of the dummy hardware (IDX 4) is correct. See the list in menu setup - hardware.
Better is to create dummy hardware manually from the user interface. https://www.domoticz.com/wiki/Dummy_for ... l_Switches

[niekniek89]

Hello,

the dummy sensor has the same IDX as in the script.

1. I create a dummy in hardware.
2 inside the dummy I create a sensor.
3. I adapt the script to the IDX of the created sensor.

4. how does the dummy/sensor know which script to look at?

I just put the script in a folder: /home/docker/domoticz/scripts/lua_parsers

I don't have a reference to the script anywhere, is that correct?
the sensor is now no longer gray but does nothing.

[mgerhard74]

Add you script in Domoticz in Setup / more options / events. (+) Lua
Paste your script here. Save.
View Logs for Errors. The script update the sensor with the id of the script.