Domoticz

salvacalatayud wrote: ↑Friday 01 February 2019 12:31 As my pi is far from the counter, I would like to use a wemos d1 and send data via mqtt, is it possible to use this script to calculate instant power this way?

DarkG wrote: ↑Wednesday 06 May 2020 21:15 Is there a manual how to use this?

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Code: Select all

#!/usr/bin/env python

'''
Based on https://www.domoticz.com/forum/viewtopic.php?f=32&t=11315
by RidingTheFlow
'''

import time
import json
import requests
import threading
from gpiozero import DigitalInputDevice

get_url = 'http://<domoticz url:port>/json.htm?type=devices&rid=%s'
set_url = 'http://<domoticz url:port>/json.htm?type=command&param=udevice&idx=%s&svalue=%s'
gas_idx = <idx for gas sensor>
gas_gpio = 17
elec_idx = <idx for electricity sensor>
elec_gpio = 24

gas_delta = 0
gas_counter_lock = threading.Lock()
elec_delta = 0
elec_counter_lock = threading.Lock()
elec_last_time = 0
elec_post_time = 0

def gas_intr():
    global gas_delta
    with gas_counter_lock:
        gas_delta += 10

def elec_intr():
    tme = time.time()
    global elec_delta
    global elec_last_time
    global elec_post_time
    with elec_counter_lock:
        elec_last_time = tme
        if elec_post_time == 0:
            elec_post_time = elec_last_time
        else:
            elec_delta += 1

def main():
    global gas_delta
    global gas_counter
    global elec_delta
    global elec_last_time
    global elec_post_time
    global elec_counter
        
    res = requests.get(get_url % elec_idx).json()
    elec_counter = int(float(res['result'][0]['Data'][:-4]) * 1000)

    res = requests.get(get_url % gas_idx).json()
    gas_counter = int(float(res['result'][0]['Data']) * 1000)
    
    elecSensor = DigitalInputDevice(elec_gpio, pull_up=True)
    elecSensor.when_deactivated = elec_intr

    gasSensor = DigitalInputDevice(gas_gpio, pull_up=True)
    gasSensor.when_activated = gas_intr  
    
    while True:
        time.sleep(60)

        gas_delta_post = gas_delta

        if gas_delta_post >= 0:
            gas_counter += gas_delta_post
            with gas_counter_lock:
                gas_delta -= gas_delta_post
            meter  = format(gas_counter / 1000.0, '.3f')
            res = requests.get(set_url % (gas_idx, gas_counter))

        with elec_counter_lock:
            if elec_last_time > elec_post_time:
                elec_load = elec_delta * 3600 / ( elec_last_time - elec_post_time )
            else:
                elec_load = 0

            elec_counter += elec_delta
            meter  = format(elec_counter / 1000.0, '.2f')

            elec_delta = 0
            elec_post_time = elec_last_time

        if elec_load != 0:
            res = requests.get((set_url+';%s') % (elec_idx, int(elec_load), elec_counter))


if __name__=="__main__":
    main()  

Spoiler: show

Code: Select all

-- dzVents script to calculate electricity and gas costs

return {
    on = { timer   = { "every minute" }}, 

    execute = function(dz)
        -- devices
        local elecUsage     = dz.devices("Electricity usage").counterToday
        local elecCost	    = dz.devices("Electricity cost")
        local elecEnergy    = dz.devices("Electricity energy")
        local gasUsage		= dz.devices("Gas usage").counterToday
        local gasCost		= dz.devices("Gas cost")
        local gasEnergy		= dz.devices("Gas energy")
        local totalCost		= dz.devices("Total cost")
        local costTest		= dz.devices("Cost_test")
        
        -- prices in pence
        local elecStdChge = 20.44
        local elecUnitPrice  = 13.587
        local m3_kWh = 1.02264 * 39.3 / 3.6 -- conversion factor x calorific value / kWh
        local gasStdChge = 20.44
        local gasUnitPrice = 3.371
        
        -- calculate values
        local elecCostVal	= dz.utils.round((elecUsage * elecUnitPrice + elecStdChge),1)   -- rounded to 1 dp
        local elecUsageVal	= dz.utils.round(elecUsage,3)            	                  -- rounded to 3 dp's
        local gasCostVal   	= dz.utils.round((gasUsage * m3_kWh * gasUnitPrice + gasStdChge),1)   -- rounded to 1 dp
        local gasEnergyVal  = dz.utils.round((gasUsage * m3_kWh),3)  -- rounded to 3 dp's
        local totalCostVal  = elecCostVal + gasCostVal
        --print(elecCostText, gasCostText, totalCostText)

        -- update devices
        elecCost.updateCustomSensor(elecCostVal)
        elecEnergy.updateCustomSensor(elecUsageVal)
        gasCost.updateCustomSensor(gasCostVal)
        gasEnergy.updateCustomSensor(gasEnergyVal)
        totalCost.updateCustomSensor(totalCostVal)
        costTest.updateCounter(totalCostVal)
    
    end
}

DarkG wrote: ↑Wednesday 13 May 2020 11:10 Thank you.

My questions is where to put the script and how to autostart it.

python /home/pi/devices/elec_gas_meter.py &

@reboot python /home/pi/elec_gas_meter.py > /dev/null 2>&1 &

I put the script in home directory and ecexuted it, but I get no Data in Domoticz. IDX is right.

RidingTheFlow wrote: ↑Tuesday 29 March 2016 14:34 For gas meter I detected a magnet which was located *after* the last digit disk.

azonneveld wrote: ↑Thursday 14 May 2020 12:17

RidingTheFlow wrote: ↑Tuesday 29 March 2016 14:34 For gas meter I detected a magnet which was located *after* the last digit disk.

I am also looking for a solution to read my gasmeter.
Could you post a picture of you gasmeter, so I could determine if my gasmeter also has this magnet?

MikeF wrote: ↑Thursday 14 May 2020 13:32 This is an Actaris G4 meter - as you can see, there is a small silver magnet in place of the 0 digit in the last reel