Script or Blockly for activate switch when battery is low

[NetEye]

I have a 24V battery which I monitor with a INA219 (Volt), I manually start the charger with a relais by a switch in domoticz.
Can anyone help me to make this action automatic?
For instance when the INA219 shows 23 Volt, -> activate the switch which starts the charger.
I use ESPEasy and a RPi as controller.
The voltage reading is a INA219 sensor connected to a ESP8266 with ESPEasy as software which measures voltage.
What I liked to have is for instance at 23 Volt it can activate an relais which is connected also to the ESP.
The relay works with the command:
Http://<ESP IP adresss>/control?cmd=GPIO,<pin>,0
Http://<ESP IP adresss>/control?cmd=GPIO,<pin>,1
(One for start and one for stop).
I read about rules in ESPEasy or Blockly in Domoticz and also there is a way with scripts.
I’am not familiar with these, maybe someone who can coach me?
Maybe somebody has a script which I maybe can modify to my wishes?
Regards

[waaren]

I have a 24V battery which I monitor with a INA219 (Volt), I manually start the charger with a relais by a switch in domoticz.
Can anyone help me to make this action automatic?
For instance when the INA219 shows 23 Volt, -> activate the switch which starts the charger.
I use ESPEasy and a RPi as controller.
Maybe somebody has a script which I maybe can modify to my wishes?
Regards

How do you readout the batterylevel now ? Do you have a URL or domoticz sensor for that ?

[NetEye]

Hallo waaren, thanks for your quick answer.
The voltage reading is a INA219 sensor connected to a ESP8266 with ESPEasy as software which measures voltage.
What I liked to have is for instance at 23 Volt it can activate an relais which is connected also to the ESP.
The relay works with the command:
Http://<ESP IP adresss>/control?cmd=GPIO,<pin>,0
Http://<ESP IP adresss>/control?cmd=GPIO,<pin>,1
(One for start and one for stop).
I read about rules in ESPEasy or Blockly in Domoticz and also there is a way with scripts.
I’am not familiar with these, maybe someone (you?) can coach me?
Hope I informed you complete?
Regards,
Jan

[waaren]

The voltage reading is a INA219 sensor connected to a ESP8266 with ESPEasy as software which measures voltage.
The relay works with the command:
Http://<ESP IP adresss>/control?cmd=GPIO,<pin>,0
Http://<ESP IP adresss>/control?cmd=GPIO,<pin>,1
(One for start and one for stop).

Some additional questions: do you see the voltage in domoticz and if so what is the name of that virtual voltage meter ?

[NetEye]

Dear waaren,
Yes I can see the voltage in domoticz on it’s own id nr and his name is: Licht accu
Regards
Jan

[waaren]

Dear waaren,
Yes I can see the voltage in domoticz on it’s own id nr and his name is: Licht accu
Regards
Jan

I hope I understand your requirements and setup correctly.
If not; please do not hesitate...

Look at the 10 lines Using dzVents with Domoticz for a short intro to dzVents and howto get this script active in domoticz.

Code: Select all

-- operateRelay.lua
 
return { 
    on      =   {   timer          =    { "every 10 minutes" }}, 
                    
    logging =   {   level       =   domoticz.LOG_DEBUG,                                   
                    marker      =  "operateRelay" },
                    
    execute = function(dz)
        -- Modify values below this line ----------
        relaySwitch     = dz.devices("relaySwitch") -- Name of your relaySwitch within quotes or idx without quotes
        voltageSensor   = dz.devices("Licht accu")  -- Name of your voltageSensor within quotes or idx without quotes
        lowVoltage      = 23                        -- below this value the switch will be turned on
        highVoltage     = 23.5                      -- Above this value the switch will be turned off 
        hysteresisDelay = 10                        -- Delay to prevent too frequent on/off actions
        -- Modify values above this line ----------
        
        if relaySwitch.lastUpdate.minutesAgo > hysteresisDelay then
            if voltageSensor.voltage > highVoltage then
                relaySwitch.switchOff().checkFirst()
            elseif voltageSensor.voltage < lowVoltage then
                relaySwitch.switchOff().checkFirst()
            end    
        end
    end
}