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"Busy please knock" notice on Dinky (or a window in the door) #1185

goatchurchprime opened this issue Jul 25, 2019 · 3 comments


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commented Jul 25, 2019

I've barged into meetings too many times into Dinky, thinking that the room was empty.

We need some way for people on the outside to tell if it's in use, like a window or a light switch, so we know to knock first, or even not go in if it's not very important.


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commented Jul 29, 2019

Propose a rotary sign - VACANT OCCUPIED



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commented Jul 30, 2019

Similar to the old 'The Doctor is In/Out' signs. Nice.

Shouldn't actually be too difficult to make as well, I suppose. The only problem would be if people forget to update it, and no-one dares go in the room for a week.


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commented Aug 10, 2019

I wondered if a simple "time since last movement" indicator would work, so have installed a prototype for that today. There's an ESP8266 with a PIR sensor in the room, which publishes a dinky/motion message (with payload "1") to mqtt.local whenever it's tripped (and a followup message with payload "0" a couple of seconds later).
PIR sensor prototype

A second board is on my desk (for now, so I can keep an eye on it) and that has an RGB indicator LED on it that goes red whenever motion is detected, then cycles through a few other colours over the following four minutes before going off.
Occupancy indicator prototype

I expect we'll need to fine-tune the time the LED takes to go off, but we'll see if it works first :-)

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