I’v found a way to customize my solar energy pannel in Openhab3,I’d like to share it with you.
I’m using this folked version:GitHub - lewei50/habpanel-powerflow-widget: SVG based widget to display power flow
Step1:get all data from your device,I am using IamMeter Three Phase Wi-Fi Energy Meter
it provides data from http GET method.
we can get data using “HTTP Binding” or “IamMeter Binding” in Openhab,just follow instructions from iammeter website
I am using HTTP Binding as example,using these codes below to fetch data to items:
UID: http:url:cd4259d574
label: solarurl
thingTypeUID: http:url
configuration:
authMode: BASIC
ignoreSSLErrors: false
baseURL: https://www.iammeter.com/api/v1/site/meterdata/YOUR_SN?token=your_token_on_web_site
delay: 0
stateMethod: GET
refresh: 30
commandMethod: GET
contentType: application/json
timeout: 3000
bufferSize: 2048
channels:
\- id: solar_voltage_a
channelTypeUID: http:number
label: Voltage
description: null
configuration:
mode: READONLY
stateTransformation: JSONPATH:$.data.values[0][0]
unit: V
\- id: solar_current_a
channelTypeUID: http:number
label: Current
description: null
configuration:
mode: READONLY
stateTransformation: JSONPATH:$.data.values[0][1]
unit: A
\- id: solar_power_a
channelTypeUID: http:number
label: Power
description: null
configuration:
mode: READONLY
stateTransformation: JSONPATH:$.data.values[0][2]
unit: W
\- id: solar_importenergy_a
channelTypeUID: http:number
label: Importenergy
description: null
configuration:
mode: READONLY
stateTransformation: JSONPATH:$.data.values[0][3]
unit: kWh
\- id: solar_exportgrid_a
channelTypeUID: http:number
label: Exportgrid
description: null
configuration:
mode: READONLY
stateTransformation: JSONPATH:$.data.values[0][4]
unit: kWh
\- id: solar_voltage_b
channelTypeUID: http:number
label: Voltage
description: null
configuration:
mode: READONLY
stateTransformation: JSONPATH:$.data.values[1][0]
unit: V
\- id: solar_current_b
channelTypeUID: http:number
label: Current
description: null
configuration:
mode: READONLY
stateTransformation: JSONPATH:$.data.values[1][1]
unit: A
\- id: solar_power_b
channelTypeUID: http:number
label: Power
description: null
configuration:
mode: READONLY
stateTransformation: JSONPATH:$.data.values[1][2]
unit: W
\- id: solar_importenergy_b
channelTypeUID: http:number
label: Importenergy
description: null
configuration:
mode: READONLY
stateTransformation: JSONPATH:$.data.values[1][3]
unit: kWh
\- id: solar_exportgrid_b
channelTypeUID: http:number
label: Exportgrid
description: null
configuration:
mode: READONLY
stateTransformation: JSONPATH:$.data.values[1][4]
unit: kWh
\- id: solar_voltage_c
channelTypeUID: http:number
label: Voltage
description: null
configuration:
mode: READONLY
stateTransformation: JSONPATH:$.data.values[2][0]
unit: V
\- id: solar_current_c
channelTypeUID: http:number
label: Current
description: null
configuration:
mode: READONLY
stateTransformation: JSONPATH:$.data.values[2][1]
unit: A
\- id: solar_power_c
channelTypeUID: http:number
label: Power
description: null
configuration:
mode: READONLY
stateTransformation: JSONPATH:$.data.values[2][2]
unit: W
\- id: solar_importenergy_c
channelTypeUID: http:number
label: Importenergy
description: null
configuration:
mode: READONLY
stateTransformation: JSONPATH:$.data.values[2][3]
unit: kWh
\- id: solar_exportgrid_c
channelTypeUID: http:number
label: Exportgrid
description: null
configuration:
mode: READONLY
stateTransformation: JSONPATH:$.data.values[2][4]
unit: kWh
Step2:Calculate data from raw data.
all data above were raw data,and can’t be displayed in Pannel directly.we use RULES in Openhab system to calculate them.
rule "Update Energy Usage"
when
Time cron "0 0 0 * * ? *"
then
end
rule "Update Solar Energy Today"
when
//Item solar_power_a changed
Time cron "0 * * * * ?" //for debug
then
//var Number feedin_power_tmp = (solar_power_b.state as Number) * (-1|W)
var load_power_tmp = ( (solar_power_a.state as Number) + (solar_power_b.state as Number) )* (1|W)
inverter_power.postUpdate(solar_power_a.state)
feedin_power.postUpdate( (solar_power_b.state as Number) * (-1|W) )
load_power.postUpdate( load_power_tmp )
grid_consumption_energy.postUpdate(solar_importenergy_b.state)
exported_energy.postUpdate(solar_exportgrid_b.state)
yield_energy.postUpdate(solar_importenergy_a.state)
var selfuse_energy_tmp = ((yield_energy.state as Number).floatValue - (exported_energy.state as Number).floatValue)*(1|kWh)
var load_energy_tmp = ((grid_consumption_energy.state as Number).floatValue + (yield_energy.state as Number).floatValue - (exported_energy.state as Number).floatValue)*(1|kWh)
selfuse_energy.postUpdate( selfuse_energy_tmp )
load_energy.postUpdate( load_energy_tmp )
var Number self_consumption_rate_daily_tmp
var Number self_consumption_rate_monthly_tmp
var grid_consumption_energy_now = ((grid_consumption_energy.state as Number).floatValue)*(1|kWh)
var grid_consumption_energy_daily_min = (grid_consumption_energy.minimumSince(now.with(LocalTime.of(0,0,0,0)),"rrd4j").state as Number)*(1|kWh)
grid_consumption_energy_daily.postUpdate((grid_consumption_energy_now - grid_consumption_energy_daily_min))
var exported_energy_now = (exported_energy.state as Number)*(1|kWh)
var exported_energy_daily_min = (exported_energy.minimumSince(now.with(LocalTime.of(0,0,0,0)),"rrd4j").state as Number)*(1|kWh)
exported_energy_daily.postUpdate((exported_energy_now - exported_energy_daily_min))
var yield_energy_now = (yield_energy.state as Number)*(1|kWh)
var yield_energy_daily_min = (yield_energy.minimumSince( now.with(LocalTime.of(0,0,0,0)),"rrd4j").state as Number)*(1|kWh)
yield_energy_daily.postUpdate((yield_energy_now - yield_energy_daily_min))
var selfuse_energy_daily_min = (selfuse_energy.minimumSince( now.with(LocalTime.of(0,0,0,0)),"rrd4j").state as Number)*(1|kWh)
selfuse_energy_daily.postUpdate((selfuse_energy_tmp - selfuse_energy_daily_min))
var load_energy_daily_min = (load_energy.minimumSince(now.with(LocalTime.of(0,0,0,0)),"rrd4j").state as Number)*(1|kWh)
load_energy_daily.postUpdate((load_energy_tmp - load_energy_daily_min))
end
Step3:Configuation pannel
git clone GitHub - lewei50/habpanel-powerflow-widget: SVG based widget to display power flow
Add widget in Page configuation of Openhab,import from file “power-flow.widget.json” that we cloned just now.
copy directory “powerFlow” to your Openhab(openhab\conf\html)
after that,you can add this widget “Power Flow”.
config it with:
House power usage->#load_power
Battery capacity->#invert_power
Grid power->#feedin_power
Solar power->#invert_power
Battery power->#selfuse_energy_daily
All done,you can see your Solar Pannel on Openhab pages now!
