Domoticz

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-- Bargraph maker for text device -- RonkA
return {
    on = {
        timer = { 'every minute' },
    },
    logging = {
        level = domoticz.LOG_ERROR,
        marker = 'Bargraph',
    },
    execute = function(domoticz, triggeredItem)

        local bar_length = 30        -- number of segments in bargraph; resize as you wish
        local initial_value = 24     -- initial value to start bargraph at
        local max_value = 75         -- max value of Bargraph
        local bar_length_medium = 50 -- 1st color value yellow
        local bar_length_hot = 60    -- 2nd color value red
        
        local text_device = domoticz.devices('Bargraph')  -- idx 335 --> the right idx HAS to be set in line 76 !!!
        local value_device = domoticz.devices('Boiler gemiddelde temperatuur')  -- this device produces the barvalue
        
        local raw_value = value_device.temperature   -- because value_device comes from a temperature device I use .temperature
        local round_value = domoticz.utils.round(raw_value,0)   -- rounding the raw_value to whole numbers
        
        local one_segment = (max_value - initial_value) / bar_length                        -- calculate value of 1 segment
        local green_zone = math.floor((bar_length_medium - initial_value) / one_segment)    -- calculate the number of segments in the green zone
        local yellow_zone = math.floor((bar_length_hot - initial_value) / one_segment)      -- calculate the number of segments in the yellow zone            
        local red_zone = bar_length                                                         -- the remaining segments are for the red zone      
        
        local segment_count = math.floor((raw_value - initial_value) / one_segment)         -- number of segments to display in bargraph 
  

            -- calculate the percentage value round to the nearest whole number
        local percentage = (raw_value - initial_value) / (max_value - initial_value) * 100
        if percentage < 0 then
            percentage = 0
        elseif percentage > 100 then
            percentage = 100
        end
        local percentage_display = math.floor(percentage + 0.5)


            -- building the separate bar segments
        local green_bar = ''
        local yellow_bar = ''
        local red_bar = ''
        
        if segment_count <= green_zone then
            green_bar = '<span style="color: Green;">' .. string.rep('█', segment_count) .. '</span>' ..
                        '<span style="color: Wheat; background-color: Green;">' .. string.rep('▓', green_zone - segment_count) .. '</span>'
            yellow_bar = '<span style="color: Wheat; background-color: yellow;">' .. string.rep('▓', yellow_zone - green_zone) .. '</span>'
            red_bar = '<span style="color: Wheat; background-color: red;">' .. string.rep('▓', red_zone - yellow_zone) .. '</span>'
        elseif segment_count > green_zone and segment_count <= yellow_zone then
            green_bar = '<span style="color: Green;">' .. string.rep('█', green_zone) .. '</span>'
            yellow_bar = '<span style="color: Yellow;">' .. string.rep('█', segment_count - green_zone) .. '</span>' ..
                         '<span style="color: Wheat; background-color: yellow;">' .. string.rep('▓', yellow_zone - segment_count) .. '</span>'
            red_bar = '<span style="color: Wheat; background-color: red;">' .. string.rep('▓', red_zone - yellow_zone) .. '</span>'            
        elseif segment_count > yellow_zone then
            green_bar = '<span style="color: Green;">' .. string.rep('█', green_zone) .. '</span>'
            yellow_bar = '<span style="color: Yellow;">' .. string.rep('█', yellow_zone - green_zone) .. '</span>'
            red_bar = '<span style="color: Red;">' .. string.rep('█', segment_count - yellow_zone) .. '</span>' ..
                      '<span style="color: Wheat; background-color: red;">' .. string.rep('▓', red_zone - segment_count) .. '</span>'
        end    
        
            -- building the bar
        local bar = '<span style="font-family: Consolas; font-weight: bold; font-size: 14px;">' ..
                    initial_value .. '°C' .. '▐' .. green_bar .. yellow_bar .. red_bar .. '▌' .. max_value .. '°C\n' .. 
                    string.rep(' ', segment_count + 4) ..  '▲\n' .. 
                    string.rep(' ', segment_count) .. round_value .. '°C⁞'.. percentage_display .. '%' .. '</span>' 

            -- check if the current message is same as the new message        
        local current_message = text_device.text
        if (current_message ~= bar) then 
            text_device.updateText(bar)  -- Update the text device
            
 ----------> automatically clear the log of the textdevice; change the ip and portnumber accordingly to your setup..
            domoticz.openURL('http://127.17.0.2:80/json.htm?type=command&param=clearlightlog&idx=335')     
        else
            return -- This will stop the script and no log entry will be made
        end         
    end
}

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dz.openURL('http://<IP>:<PORT>/json.htm?type=command&param=clearlightlog&idx=<INDEXNUMBER>')

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 ----------> automatically clear the log of the textdevice; change the ip and portnumber accordingly to your setup..
            domoticz.openURL('http://127.17.0.2:80/json.htm?type=command&param=clearlightlog&idx=335')