[SOLVED] Sonoff POW2 espurna FW reflashed, items for U,I,P,Q,cosfi,energy via http bindig

Setup, Configuration and Use Items & Sitemaps
1

Hi,
values from http api request are shown in internet browser via http requests:

Is this item definition possible ?

String Pow2_Voltage “Pow2 [%s]” (Sonoff) { http="<[http://sonoffpow2ip/api/voltage?apikey=xxxxxxxxxxxxxxxx]" }
Answer is 223 (meanings Volt)

http://sonoffpow2ip/api/voltage?apikey=xxxxxxxxxxxxxxxx
http://sonoffpow2ip/api/current?apikey=xxxxxxxxxxxxxxxx
http://sonoffpow2ip/api/power?apikey=xxxxxxxxxxxxxxxx
http://sonoffpow2ip/api/apparent?apikey=xxxxxxxxxxxxxxxx
http://sonoffpow2ip/api/factor?apikey=xxxxxxxxxxxxxxxx
http://sonoffpow2ip/api/energy?apikey=xxxxxxxxxxxxxxxx

How shoulde be defined items for this Numbers ? Strings ? vaules ?
Thanks.

2

If the result of the transform is just a number with no units or extra spaces then you can use a Number. Otherwise you need to use a String or parse it there non number parts using a Rule.

3

Hello Rich. Thanks for answer.
It looks like string without anything.

String
String.JPG1257×811 61.8 KB

String Pow2_Voltage “Pow2 [%s]” (Sonoff) { http="<[http://pow2ip/api/voltage?apikey=xxxxxxxx]" }
gives no value back to string item.

4

Perhaps, but as as far as one can tell in that screenshot there could be a space before or after the 230 or there could be some HTML tags which would be hidden in the browser.

Do you see errors in the log?

5

Small python script returns the value:

#!/usr/bin/python3
import requests

r = requests.get(‘http://pow2ip/api/voltage?apikey=xxxxxxxxxxxxxxxx’)
data = r.content
print(“Voltage=”,data,“V”)

returns
(‘Voltage=’, ‘231’, ‘V’)

How should i put the 232 value to a string item and convert it to number.
Number would be used in rules for comparissons.

6

Have you installed the HTTP binding?

7

Yes of course

8
9

Hi,
this returns string
String Pow2_Voltage “Pow2 Voltage [%s V]” (Sonoff) { http="<[http://sonoffip/api/voltage?apikey=xxxxxxxxxxxxxxxxx:3000:JSONPATH($.data)]" }

For display it is enough. But I need to make some rules for comparison of number values.
If Pow2_Power is greater as high trigger value = daikin is on, if Pow2_Power is below low trigger value= daikin is off.

How to convert string value to number please ?
Can it be done with REGEX g´transformation or converting rule should be created ?
Thanks.

10

Like I said above, if what JSONPATH($.data) is just a number with no spaces or non-number characters then just change the Item type to Number.

Number Pow2_Voltage ...

If not, you will need a Rule that triggers when Pow2_Voltage changes, strips off the extraneous characters using String.split or a regex transform and updates the value of the Number Pow2_Voltage_Proxy Item.

11

Item Number definition works fine, thanks for help Rich.

12

My sollution also with MQTT
Items:

// Sonoff via MQTT
Group  Sonoff_POW

Switch Sonoff_POW_Switch    "Power switch"         <energy> (Sonoff_POW) { channel="mqtt:topic:mosquitto:sonoffpow2:relay/0" }
Number Sonoff_POW_Load      "Power load [%.1f W]"  <energy> (Sonoff_POW) { channel="mqtt:topic:mosquitto:sonoffpow2:power" }
Number Sonoff_POW_Voltage   "Voltage [%.1f V]"     <energy> (Sonoff_POW) { channel="mqtt:topic:mosquitto:sonoffpow2:voltage" }
Number Sonoff_POW_Current   "Current [%.3f A]"     <energy> (Sonoff_POW) { channel="mqtt:topic:mosquitto:sonoffpow2:current" }
Number Sonoff_POW_Apparent  "Apparent [%.0f VAr]"  <energy> (Sonoff_POW) { channel="mqtt:topic:mosquitto:sonoffpow2:apparent" }
Number Sonoff_POW_Energy    "Energy [%.3f kWh]"    <energy> (Sonoff_POW) { channel="mqtt:topic:mosquitto:sonoffpow2:energy" }
Number Sonoff_POW_Factor    "Factor [%.0f]"        <energy> (Sonoff_POW) { channel="mqtt:topic:mosquitto:sonoffpow2:factor" }

Things:

Bridge mqtt:broker:mosquitto "embedded-mqtt-broker" [ host="RPi_IP", port=1883, secure=false, username="", password="" ]
{   
    Thing topic sonoffpow2  {
    Channels:
        Type switch : switch       "Power relay"     [ stateTopic="ESPURNA-CA45ED/data", commandTopic="ESPURNA-CA45ED/relay/0/set", transformationPattern="JSONPATH:$.relay/0"  ]
        Type number : voltage      "Line voltage"    [ stateTopic="ESPURNA-CA45ED/data", transformationPattern="JSONPATH:$.voltage"]
        Type number : power        "Power load"      [ stateTopic="ESPURNA-CA45ED/data", transformationPattern="JSONPATH:$.power"]
        Type number : apparent     "Power apparent"  [ stateTopic="ESPURNA-CA45ED/data", transformationPattern="JSONPATH:$.apparent"]
        Type number : current      "Line current"    [ stateTopic="ESPURNA-CA45ED/data", transformationPattern="JSONPATH:$.current"]
        Type number : factor       "Line factor"     [ stateTopic="ESPURNA-CA45ED/data", transformationPattern="JSONPATH:$.factor"]        
        Type number : energy       "Energy today"    [ stateTopic="ESPURNA-CA45ED/data", transformationPattern="JSONPATH:$.energy"]
    }  
}

Sitemap:

 Group  item=Sonoff_POW