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25 lines
757 B
Lua
25 lines
757 B
Lua
-- return the current battery level
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function BatteryLevel()
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local p = io.popen("gasgauge-info -s 2> /dev/null", "r") -- io.popen() _never_ fails!
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local battery = p:read("*a") or "?"
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if battery == "" then battery = "?" end
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p:close()
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return string.gsub(battery, "[\n\r]+", "")
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end
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-- log battery level in "batlog.txt" file, blevent can be any string
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function logBatteryLevel(blevent)
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if not G_battery_logging then return end
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local file = io.open("batlog.txt", "a+")
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if file then
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if file:seek("end") == 0 then -- write the header only once
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file:write("DATE\t\tTIME\t\tBATTERY\tEVENT\n")
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end
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file:write(string.format("%s\t%s\t%s\t%s\n",
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os.date("%d-%b-%y"), os.date("%T"),
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BatteryLevel(), blevent or "RUNNING"))
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file:close()
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end
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end
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