The document discusses the importance of understanding and selecting sensors in the context of the Internet of Things, highlighting advancements that simplify environmental sensing. Jonathan Carter, co-organizer of Sensemakers and founder of Measure Everything, presents his work on basic sensing devices, focusing on temperature, humidity, and barometric pressure sensors. He emphasizes that understanding the sensor market is crucial for impactful project development and outlines specific sensor models that he used based on practical criteria.

1. All about Sensors at
Sensmakers
AMSTERDAM
Jonathan Carter
co-organiser of Sensemakers, co founder of Glimworm , Glimworm Beacons
and now founder of “MeasureEverything”

2. WHY NOW?
We are at a very exciting juncture in the history of the Internet Of
Things
Recently technology has advanced to remove the last barriers to
sensing our own environment
For most of the ‘old hands’ we can turn our attention back to the
questions that we posed in the first place
Understanding and choosing sensors is now the most important
decision you have to make

3. The journey of sensor data
Sense something (?)
[this is the sensor]
|
Collect and send to the cloud
[This is the arduino (or similar) and Lora/ BLE/WIFI]
|
Get data Store and process in the cloud
[MQTT, Bluemix, Amazon, own system]
|
Analyse , report, present, action
[maps, api, apps, watson, etc….. ]
|
END

4. Garbage In Garbage out
I Recently I made a product set for simple sensing “Measure
Everything” and in the process I had to actually come to conclusions
about what sensors to use for the most simple of situations; this is
what I am presenting tonight
It is my hypotheses that if we want to make an impact we need to
understand the sensor market and then build this into projects at the
start
Tonight I start with Temperature, Humidity and Barometric Preassure
- these for the basis of many other things we want to measure, in
later weeks I will go onto more advanced topics

5. RW1820 (TEMPERATURE)

6. DS18B20 (Temperature)

7. DHT11 (Temp + Humidity)

8. DHT22 (Temp + Humidity)

9. BMP280 (barometric pressure)

10. BME280 (temp + humid + Baro)

11. My Criteria
Not very scientific
Pressure — as good as my iPhone?
Temp and humidity — as good as my home device
Low power and connectable via 3.3v
(I want to run everything on batteries so 3.3v is more handy)
Simple as that!

12. My Setup

13. SPI
I2C
Analogue
Digital
Serial
Ways to connect to a sensor
More devices
one cable
One Wire

14. SPI
I2C
Analogue
Digital
Serial
Ways to connect to a sensor
One Wire

15. PRACTICAL

16. BME280 (temp + humid + Baro)