71 lines
2.2 KiB
Lua
71 lines
2.2 KiB
Lua
-- Global variable
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m=nil
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mqttConnected = false
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-- MQTT extension
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function registerMqtt()
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m = mqtt.Client("wordclock", 120)
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-- on publish message receive event
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m:on("message", function(client, topic, data)
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print(topic .. ":" )
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if data ~= nil then
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print(data)
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if (data == "ON") then
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briPercent=100
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m:publish(mqttPrefix .. "/clock", "ON", 0, 0)
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elseif (data == "OFF") then
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briPercent=0
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m:publish(mqttPrefix .. "/clock", "OFF", 0, 0)
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elseif (data:sub(1,1) == "#" and data:len() == 7) then
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red = tonumber(data:sub(2,3), 16)
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green = tonumber(data:sub(4,5), 16)
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blue = tonumber(data:sub(6,7), 16)
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colorBg=string.char(red, green, blue)
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else
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if (tonumber(data) >= 0 and tonumber(data) <= 100) then
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briPercent=tonumber(data)
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m:publish(mqttPrefix .. "/clock", tostring(data), 0, 0)
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end
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end
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end
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end)
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m:connect(mqttServer, 1883, 0, function(client)
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print("MQTT is connected")
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mqttConnected = true
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-- subscribe topic with qos = 0
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client:subscribe(mqttPrefix .. "/command", 0)
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tmr.alarm(3, 500, 0, function()
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-- publish a message with data = hello, QoS = 0, retain = 0
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client:publish(mqttPrefix .. "/ip", tostring(wifi.sta.getip()), 0, 0)
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end)
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end,
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function(client, reason)
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print("failed reason: " .. reason)
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mqttConnected = false
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end)
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end
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function startMqttClient()
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if (mqttServer ~= nil and mqttPrefix ~= nil) then
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registerMqtt()
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print "Started MQTT client"
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oldBrightness=0
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oldTemp=0
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tmr.alarm(5, 5001, 1 ,function()
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if (mqttConnected) then
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local temp = nil
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if (t ~= nil) then
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temp=readTemp()
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end
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if (oldBrightness ~= briPercent) then
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m:publish(mqttPrefix .. "/brightness", tostring(briPercent), 0, 0)
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else
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m:publish(mqttPrefix .. "/heap", tostring(node.heap()), 0, 0)
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end
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oldBrightness = briPercent
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end
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end)
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end
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end
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