This week's EYE ON NPI is another banger from Sensirion - who has been really rockin' out with great sensors over the last few years - it's the SEN54 Environmental Sensor Node (https://www.digikey.com/en/product-highlight/s/sensirion/sek-sen5x-evaluation-kit), an all-in-one sensor node that combines all of the Sensirion top hits in one. This sensor looks like your everyday dust sensor - just like the SPS30 particulate sensor (https://www.digikey.com/en/products/detail/sensirion-ag/SPS30/9598990), but combines additional sensors inside!

There's a few models planned for the SEN5X series - today we're highlighting the SEN54 which has

* Particulate Matter - PM2.5

* Humidity and Temperature via SHT40 (https://www.digikey.com/en/products/detail/sensirion-ag/SHT40-AD1B-R3/14322709)

* Volatile Organic Compound via SGP41 (https://www.digikey.com/en/products/detail/sensirion-ag/SGP41-D-R4/15652788)

(There's also a SEN55 which will include an addition NOx sensor, but it has not been released yet)

The sensor uses a sub-processor that will act as a single I2C peripheral to receive commands and send sensor data back. It's a great deal if you want a simple-to-install air quality sensor with all the goodies. There's a 3D model available for mechanical installation, and for connectivity you just need a single JST GHR 6 pin (https://www.digikey.com/en/products/detail/jst-sales-america-inc/GHR-06V-S/807818) cable which has power, and I2C or UART data. Note that the cable is not sold separately so you'll need to acquire the cable from a separate vendor or pick up the full evaluation kit that comes with a couple cables at additional cost. (https://www.digikey.com/en/products/detail/sensirion-ag/SEK-SEN5X/15903862)

The real success story here is the libraries that are pre-written and supported by Sensirion that makes getting started very very fast. We were able to wire up the SEN54 to an ESP32 board and run the BLE demo (https://github.com/Sensirion/arduino-ble-gadget) within a few minutes!

Using the Sensirion MyAmbience app, (https://apps.apple.com/us/app/sensirion-myambience/id1529131572) we could see instant data show up on our iOS or Android device. Over-all a slick and easy experience. We must say that we're really impressed with how maker-engineer friendly the sensors and firmware development is.

This all-in-one sensor board is going to be a popular environmental sensor from folks who really know environmental sensing! Digi-Key has a whole bunch of the Sensirion SEN54 sensors in stock right now for immediate shipment (https://www.digikey.com/short/pn08ff2w) and with same-day shipping, you can order today and be sensing by tomorrow afternoon!