SimpleSense Presence Sensor
A SimpleSense presence sensor is like a web page counter but for a physical location. The sensor, based around a standard PIR (Passive Infrared Sensor), counts people and how long they’re present. With a rugged indoor/outdoor enclosure, built-in Cat-M1 cellular, long-lasting battery and simple SMS setup, you will be collecting presence data within 20 seconds anywhere there’s compatible cell service.
Production note: Our presence sensor is currently in alpha testing with early customers. This GroupGets campaign is for our beta version, which will be the basis for our first production run. As it is a beta, the hardware specs and specific chipsets used are subject change, but will be either as specified below or better.
* [Energizer L92](http://data.energizer.com/pdfs/l92.pdf) AAA batteries
* [Ublox SARA-R Series Cat-M1](https://bread-form.s3.amazonaws.com/components/SARA-R404M/resources/SARA-R4_DataSheet_%28UBX-16024152%29.pdf) cellular modem, 3 months of data included in purchase price
* [IP67/NEMA 4 rated case](https://www.nemaenclosures.com/media/catalog/category/ratings/NE_IP_Reference_Chart_0614.pdf?r=false), outdoor capable, protected against dust and short periods of immersion
* [SAM D21E microcontroller](https://bread-form.s3.amazonaws.com/components/ATSAMD21E17A-MUT/resources/40001882A.pdf)
* [HC-SR501 PIR motion sensor](https://www.mpja.com/download/31227sc.pdf)
* [Sparkfun LED - RGB Clear Common Cathode](https://www.sparkfun.com/datasheets/Components/YSL-R596CR3G4B5C-C10.pdf) or equivalent
* Custom PCB by [Breadware](https://breadware.com/)
* PCB dimensions: 85x60mm
![CAD drawing front](https://groupgets-files.s3.amazonaws.com/SimpleSense/front.jpg)
![CAD drawing, exploded view](https://groupgets-files.s3.amazonaws.com/SimpleSense/exploded.jpg)
* Custom RTOS implementation
* Health checks and reporting
* Over the air updates
* SMS configuration and reporting
**Data Output Formats:**
* Fields: session timestamp, session length, sensor ID
* CSV file
* REST API request
* 3 months included with purchase
* Additional data available at a discount for GroupGets purchasers, retail pricing starts at $100/year
![HC-SR501 PIR sensor](https://c.76.my/Malaysiaemail@example.com)
**HC-SR501 PIR Motion Sensor Specs**
* Maximum 110° angle sensor
* 7m maximum sensing distance
* Delay time: 5-300s ( adjustable) Range (approximately 0.3s - 5 min)
* Block time: 2.5s (default) Can be made a range (0.xx to tens of seconds)
* Operation Temp: -15 to +70 degrees
* Lens size sensor Diameter: 23mm
* [Hackster: Particle Electron Carrier for Outdoor IoT Applications](https://www.hackster.io/chipmc/particle-electron-carrier-for-outdoor-iot-applications-40ed52)
* [Particle forum electron carrier board for PIR](https://community.particle.io/t/electron-carrier-board/33379/12)
* [Simple Cellular Signal Site Survey Project](https://community.particle.io/t/simple-cellular-signal-site-survey-project/38101)
* [Github: Cellular PIR](https://github.com/chipmc/Cellular-PIR)
* [Github: Site survey project](https://github.com/chipmc/GPS-Tracker) *This tool provides a simple way to measure the signal strength and associate each reading with a GPS coordinate*
### Update #1: Alpha ###
We're now testing our alpha prototype, with early customers helping us validate the tech stack (sensor + battery + cellular) and design choices work in the real world. This bad boy is IP67 rated and has been tested outdoors for the last 8 months (that dirt on the outside is actually a waterproof coating). Obviously, it's much bigger than our beta and Gen1 will be.
### Update #2: Meet Chip ###
Chip McClelland founded [See Insights](https://www.seeinsights.com/) with his wife, combining their passions for the outdoors and technology. We found Chip through his [open source project](https://github.com/chipmc/Cellular-PIR) where he's measuring usage of parks and bike trails with cell-connected PIR sensors. Chip's building our alpha devices.
*Follow Chip on [Twitter](https://twitter.com/chipmc86) and [Github]((https://github.com/chipmc/)*
**Why did you start See Insights?**
Simply put, my wife and I love the outdoors. We saw an underserved market and a chance to provide data to both support and defend the value of parks and to provide those who run them actionable data to improve operations.
**What problem are you trying to solve with cellular PIR?**
We are focused on helping parks and recreation facilities better manage their operations by providing accurate, timely and relevant data. We use technologies that are conducive to outdoor and often remote environments such as cellular communications, solar power and discrete anonymous sensing devices such as Passive Infrared (PIR).
**What has your presence data accomplished for your clients?**
At the 550 acre Umstead State Park in Raleigh, these sensors provide near real time utilization data. This data is not only more comprehensive and accurate than before, it saves park rangers from having to drive 35 miles a day and spend countless hours collecting this data as they did in the past. There is another long-term project to document the impact of urban reforestation to reduce "hot zones" by continuously monitoring climatic conditions. These technologies are now inexpensive and simple enough that park staff can join the IoT revolution. We hope this will lead to more efficient, better run parks that serve and enjoy the support of their local communities.
###Update #3: IP67###
Part of our mission at SimpleSense is to make every sensor operable wherever you want to put it, without having to think about temperature, dust or moisture issues. Just mechanically afix it and forget it.
Enter IP67, a rating for enclosures and the standard we hold all of our future sensors to.
IP – This stands for the International Protection marking, a standard drawn up by the International Electrotechnical Commission (IEC).
6 – The first digit stands for its resistance to dust, but also general dirt and sand
7 – The second digit provides certification for water resistance
A 7 rating ensures "ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1m of submersion)" according to the IEC.