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Automated Lighting Levels
I created this to have the lighting in my home office adjust automatically to the outside lighting conditions that occur during the day so I don't end up sitting in the dark. To provide the lighting levels to this flow I built a lux sensor using a BH1750 Illuminance sensor connected to a nodeMCU running Tasmota. It sends level updates every few seconds to node-red.
Based on the lights in my room and the outside lighting available, I have lights dim if the sensor detects over 37 lux, and brighten the lights if the sensor detects below 32 lux. ( This is in the Bright / Dim node ). When the lights need to be adjusted, they are either brightened or dimmed by 5, and it moves the slider in steps of 1 every 1.5 seconds. This way the changes are lighting level are mostly not noticed.
Contributed Nodes Used
- homebridge-automation
- homekit-bridged
- simple-gate
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brightness <= (start + delta); brightness++) { \n msg.payload = {};\n msg.payload.Brightness = brightness;\n msg.payload.On = true;\n node.send(msg)\n}\n}\n// return msg;","outputs":1,"noerr":0,"x":570,"y":380,"wires":[["7bc7a5fa.22e49c"]]},{"id":"7b5b2cb6.8e5b04","type":"function","z":"8b416a1.08e4a98","name":"Dim by 5","func":"var start = msg.payload.Brightness;\nvar brightness = start;\nvar delta = -5;\nif ( brightness > 0 ) {\nfor (; brightness >= (start + delta); brightness--) { \n msg.payload = {};\n msg.payload.Brightness = brightness;\n msg.payload.On = true;\n node.send(msg)\n}}\n// return msg;","outputs":1,"noerr":0,"x":560,"y":320,"wires":[["7bc7a5fa.22e49c"]]},{"id":"7bc7a5fa.22e49c","type":"delay","z":"8b416a1.08e4a98","name":"","pauseType":"rate","timeout":"5","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1.5","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"x":760,"y":380,"wires":[["ecda151.38866e8"]]},{"id":"72590daa.45127c","type":"template","z":"8b416a1.08e4a98","name":"Reset","field":"reset","fieldType":"msg","format":"handlebars","syntax":"mustache","template":"","output":"str","x":630,"y":260,"wires":[["7bc7a5fa.22e49c"]]},{"id":"ecda151.38866e8","type":"function","z":"8b416a1.08e4a98","name":"Max/Min","func":"if (msg.payload.Brightness > 100)\n msg.payload.Brightness = 100;\nif (msg.payload.Brightness <= 0)\n { msg.payload.Brightness = 0;\n msg.payload.On = false;\n }\nreturn msg;","outputs":1,"noerr":0,"x":920,"y":380,"wires":[["4699b9d2.0899a"]]},{"id":"c393578c.2b768","type":"mqtt-broker","z":"","name":"Mqtt","broker":"mqtt.local","port":"1883","clientid":"","usetls":false,"compatmode":false,"keepalive":"60","cleansession":true,"birthTopic":"","birthQos":"0","birthRetain":"false","birthPayload":"","closeTopic":"","closeQos":"0","closeRetain":"false","closePayload":"","willTopic":"","willQos":"0","willRetain":"false","willPayload":""},{"id":"aa4ff25c.416df8","type":"hb-conf","z":"","username":"031-45-154"},{"id":"cc234500.cbcc3","type":"homekit-bridge","z":"","bridgeName":"Sheldon-NodeRed","pinCode":"031-45-154","port":"51831","allowInsecureRequest":true,"manufacturer":"Default Manufacturer","model":"Default Model","serialNo":"Default Serial Number","customMdnsConfig":false,"mdnsMulticast":true,"mdnsInterface":"","mdnsPort":"","mdnsIp":"","mdnsTtl":"","mdnsLoopback":true,"mdnsReuseAddr":true}]