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I am Infineon Sensur Hub - Nano - DPS310 check me out! I come in a nice packaging to the user and am ready to use immediately. That's my purpose: I'm an evaluation board and even piggyback a small battery.
So far spoke to me the product and also convinced with its intrinsic values: the height (altitude), as well as the barometric air pressure can be very accurately read on a coupled with Bluetooth Android smartphone on the specially available in the PlayStore App (search for "IFX DPS310"). Only the temperature deviates from the ambient temperature by up to 10 degrees Celsius: this is related to the heat development of the board itself, so the Infineon support.
But slowly: Step by step.First you activate Bluetooth - if you have not already done so - and load the app from the PlayStore. An app for iPhone users has not been issued by Infineon.
Registration is not necessary so far.
The Bluetooth scan via app displays the device found, if it is switched on with a small slide switch on the side (green) and Bluetooth (now and then blue flashing).
After pairing, a few simple settings can be made within the app.
The values can be displayed graphically in absolute or relative. The images show curves for Altitude, Pressure and Temperature - with the already mentioned accuracy limitation.
Even very small changes in height and rapid changes caused, for example, by the fall of a human were quickly demonstrated and the accuracy was convincing.
The measurement cycle is shown in the upper left corner of the app, and the upper right option is within 3 precision steps: from Low Precision, Standard Precision to High Precision, which affects the sampling rate.
Just as convincing was the barometric pressure: here, too, the values were displayed immediately and accurately.
An example video shows a completely different approach to signal the opening of doors or windows: the otherwise used reed switch (contact yes / no) is replaced by changes in air pressure.
> check Video - demo2 in the home of DPS310
The room temperature could also be measured more accurately, unless the temperature sensor could be influenced by the heat generated by the board. A calibration is not provided and so this common functionality is unfortunately not usable. Incidentally, switching the precision setting does not lead to more accurate results, as the sensor still sits on the board.
Even in the fridge, the board feels very well and varies only with 3 degrees Celsius deviation to the temperature sensor from the refrigerator. Nice is the measurement even with the door closed via Bluetooth, but here the range is the limiting factor.
Some time ago there was an Infineon contest here at Hackster: check out the examples as an inspiration for your DPS310 mission!
PoweringThe piggyback battery (140 mAh / 3,7V) is fixed with a strip and can be removed if necessary.
It is also conceivable to solder a battery of other power.
Pros:
- Development of new methodology to be able to measure a condition, be it in sports, entertainment, senior citizens, safety, etc. by excellent sensitivity
- Record the values with many export / sharing options in the app
- Functionality is IIR (infinite impulse response) filtering to distinguish where the pressure differentials come from: be it air turbulence or simple fitness activities. I could not imagine this: this function was not provided within the app.
Cons:
- limited by its Bluetooth range on Android apps
- Temperature different due to design
- re-programming or customization is not provided for this evaluation kit: this is where more products from the series are available (shuttle boards, Kits and a Arduino Solution)
- The app shown in the demo with the option to set thresholds will not be provided
- Access to a SES2G sensor software is not accessible to me - even after the Infineon support has been activated.
An alternative seems to me to be the BME280 sensor, which can be integrated with a little effort into its own structure.
Yes, a Particle USB cable can power me ;-)
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