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Hi all, I have been experimenting with entrance/exit sensors (pir and/or ultrasonic) combined with a Bluetooth scanner running on Pis to calculate relative space crowdedness for our campus. Data is sent over wifi via MQTT to a cloud Influxdb database w/ Grafana for data dashboard and alerting. I don't have published code currently but I'd be happy to share and work with others on this. I too felt that the cameras, while doable and probably more accurate, would introduce too many privacy concerns. I got the Bluetooth idea from a project I heard about awhile ago, but I can't remember the original creator (I think a librarian had these placed in a library and a Redditor found a Pi and posted a "what is this thing?" post). Does this ring any bells? Best, Monica Maceli, Ph.D. Associate Professor Pratt Institute | School of Information 144 W 14th St, 6th Floor, New York, NY, 10011-7301 www.monicamaceli.com | [log in to unmask] On Wed, Jul 8, 2020 at 8:57 PM Tom Keays <[log in to unmask]> wrote: > There was this write up from 2017 in the C4L Journal. Not cameras, but > other kinds of sensors that didn't trigger any privacy concerns. > > https://journal.code4lib.org/articles/12947 > > On Wed, Jul 8, 2020 at 1:20 PM Goben, Abigail H <[log in to unmask]> wrote: > > > I think Griffey did http://jasongriffey.net/mtf/homepage/feed/index.html > > > > > > -- > > Abigail H. Goben, MLS > > [log in to unmask] > > > > -----Original Message----- > > From: Code for Libraries <[log in to unmask]> On Behalf Of Kun Lin > > Sent: Wednesday, July 8, 2020 12:02 PM > > To: [log in to unmask] > > Subject: [CODE4LIB] Anyone attempted to use Raspberry Pi w/camera to > > monitor building capacity? > > > > Anyone attempted to use Raspberry Pi w/camera to monitor building > > capacity? Any good resources on how to do that? > > Thanks > > Kun > > >