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I found this great Instructable on how to burn down my house, with neat MQTT integration so I can start a fire directly from OpenHAB: https://www.instructables.com/id/Motorized-WiFi-IKEA-Roller-Blind/ https://www.youtube.com/watch?v=eOE7pMF-ScY A capacitor shorted out 9V to ground while I was asleep and burned the tracks right off the PCB, leaving nice deep scorch marks on my wall. I love waking up to the smell of burnt electronics.    Home automation is great, just make sure your home is non-flammable I guess.
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Jul 9, 2017 11:20
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| # ¿ May 12, 2024 08:53 |
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The esp8266 runs on 3.3v but the nodemcu board has a regulator on it so in theory it should handle 9-10v. The motor isn't strong enough to lift the blind at 5V. The datasheet for the L293DD says the max input voltage for control is 7V though so 9V for everything was a bad idea. I think the main problem is that there's no fuse anywhere in the circuit to prevent the magic smoke from escaping Attempt two has a buck converter set to 5V, maybe this time it won't catch on fire  
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Jul 9, 2017 17:03
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Look at this guy, I bet your blinds don't even have an IP address Shameful (the plan is to build 9 more of these once I'm less incompetent at electronics)
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Jul 9, 2017 17:41
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"Home Automation" is a misnomer, it's almost never automated in any meaningful way. You're just making it harder to turn on your lightbulb by having to unlock your phone, open the correct app (separate apps for each device of course) and try to click on the tiny button that hopefully does what you want. It's obviously superior compared to using the boring old lightswitch that's right there on the wall. My favorite thing so far is collecting hundreds of useless stats about my house  OpenHAB pushes everything it knows about to InfluxDB because why not 
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Jul 9, 2017 20:34
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muckswirler posted:Fuckin lomarf at mounting the pcb directly against the wall tho I've mangled the box in OpenSCAD to add a solid backing plate, space for a proper voltage regulator and taller standoffs so the board isn't directly touching anything  The instructable made it seem like the original creator knew what he was doing but holy hell there was so many problems with this
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Jul 9, 2017 20:41
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| # ¿ May 12, 2024 08:53 |
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Through the magic of https://github.com/cflurin/homebridge-mqtt and https://nodered.org I am now able to tell Siri to open my bedroom blinds, and HomeKit supports grouping by room so you can say "open the livingroom blinds" or "close all blinds" to control several at once. And all it took was three weeks of loving around and ordering parts on ebay to save several seconds of my day!
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Jul 16, 2017 14:52
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