Device “Electric (Instant+Counter)”gives Negativ value kWh at midnight

[jpmd]

I have created a virtual device “Electric (Instant+Counter)” (with idx 5551)
I have connected a hardware-part "ShineWiFi" to my Growatt" solar-inverter and provided it with my own software that sends inverter-info to Domoticz over MQTT with JSON info : {"idx":5551,"nvalue":0,"svalue":"77;7300"} .

This works fine, however...
At midnight (00:00) the device log shows a negative value as kWh. This is not sent from the inverter because the inverter is automatically switched off at night. After sunrise, the kWh is still negative but becomes less negative as energy is generated.

Am I doing something wrong or is this a bug?

I’m using:
Domoticz Version: 2023 1 on Raspberry-pi

[simat]

On my Sunny Boy read using SBFspot the Type = Usage, not sure if I had something strange like this years ago.

[gniazdoj]

I have same issue after last domoticz update. I workaround that with changing value from previous day to positive directly in database but it has one day of delay and it's annoying. I have tried to change Type from return to usage but it's same, it's only this one energy counter where inverter store values.
at maintenance time he takes sum of Energy Used from all day and invert it to negative.



Platform: Debian
Plugin/Hardware: https://github.com/ayasystems/froniusHttp
Version: 2023.1
Compile Date: 2023-02-14 15:06:40
dzVents Version: 3.1.8
Python Version: 3.7.3 (default, Oct 31 2022, 14:04:00) [GCC 8.3.0]

[jpmd]

I found the cause.

I sent to Domoticz over MQTT the JSON message: {"idx":5551,"nvalue":0,"svalue":"77;7300"} .
The 7300 was de "total Day" energy (wH). But the Domoticz virtual device “Electric (Instant+Counter)” needs the "total overall"!

Since I put the "total overall" in the JSON message the virtual device “Electric (Instant+Counter)” works fine. No negative values anymore

[gniazdoj]

I've changed line in plugin to switch to Total Overall and will see what will happen tomorrow.
Thank you for info
Jakub

[waltervl]

I've changed line in plugin to switch to Total Overall and will see what will happen tomorrow.
Thank you for info
Jakub

Then you were not on the latest version as the current version looks OK

Code: Select all

acumuladoKwhFV       = self.E_Total#accumulated
....
UpdateDevice("FV_POWER",      0, instantaneoFV+";"+acumuladoKwhFV)

[gniazdoj]

Thank you, I can see somebody has requested issue with negative values some time ago, I have modified this plugin to support more devices so I stopped watching author page. Looks like I did change that for some reason and it cause and issue. my bad

have a good day.
Jakub

[ilex]

Hi,

I still have this issue running:

Version: 2024.1 (build 15792)
Build Hash: 36a973a7e
Compile Date: 2024-01-01 16:29:36
dzVents Version: 3.1.8
Python Version: 3.9.2 (default, Feb 28 2021, 17:03:44) [GCC 10.2.1 20210110]

Device definition:

{
"ActTime" : 1709115224,
"AstrTwilightEnd" : "19:10",
"AstrTwilightStart" : "04:39",
"CivTwilightEnd" : "17:52",
"CivTwilightStart" : "05:57",
"DayLength" : "10:48",
"NautTwilightEnd" : "18:31",
"NautTwilightStart" : "05:18",
"ServerTime" : "2024-02-28 11:13:44",
"SunAtSouth" : "11:54",
"Sunrise" : "06:30",
"Sunset" : "17:18",
"app_version" : "2024.1 (build 15792)",
"result" :
[
{
"AddjMulti" : 1.0,
"AddjMulti2" : 1.0,
"AddjValue" : 0.0,
"AddjValue2" : 0.0,
"BatteryLevel" : 255,
"CounterToday" : "0.000 kWh",
"CustomImage" : 0,
"Data" : "23.171 kWh",
"Description" : "",
"EnergyMeterMode" : "0",
"Favorite" : 0,
"HardwareDisabled" : false,
"HardwareID" : 25,
"HardwareName" : "Virtual",
"HardwareType" : "Dummy (Does nothing, use for virtual switches only)",
"HardwareTypeVal" : 15,
"HaveTimeout" : false,
"ID" : "00082612",
"LastUpdate" : "2024-02-28 11:13:16",
"Name" : "PV test",
"Notifications" : "false",
"PlanID" : "14",
"PlanIDs" :
[
14
],
"Protected" : false,
"ShowNotifications" : true,
"SignalLevel" : "-",
"SubType" : "kWh",
"SwitchTypeVal" : 4,
"Timers" : "false",
"Type" : "General",
"TypeImg" : "current",
"Unit" : 1,
"Usage" : "870 Watt",
"Used" : 1,
"XOffset" : "0",
"YOffset" : "0",
"idx" : "612"
}
],
"status" : "OK",
"title" : "Devices"
}

I send data from Node Red. Sample as below:

{"command":"udevice","idx":612,"nvalue":0,"svalue":"790;23171"}

and I still get negative values from time to time :/

What do I do wrong ?

[waltervl]

{"command":"udevice","idx":612,"nvalue":0,"svalue":"790;23171"}
23171 should be a rolling Total counter.