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Hi.. can somebody plz help me out I am not able to publish my review of this roadtest
Interesting. I still have my suspicions that the constant offset is actually related to the constant heat on the board generated by the circuitry. When I mentioned nearby source, I didn't really mean nearby external sources like PC vents, and I instead meant sources external to the sensor on the board.
I am currently working on an application that uses these sensors, and I've compared the Humidity with a few calibrated meters (lower cost ones mind you), but it does appear to fall within the datasheet specifications for accuracy. Best of luck with your testing!
I had the EVM at the usb port furthest from the processor and I placed the NIST traceable next to it. If I really wanted to be serious about the temperature, I'd compare it to our Ertco-Hart, which is accurate to 0.001C. The difference in the temperatures is most likely just a basic offset issue. Since the temperature varied by the same amount throughout the testing (with one exception). Since the humidity was my main item of concern, I wanted a comparison with a known source.
Finished my comparison to an NIST traceable source. It fell within the accuracy of the device, so nothing new there. I didn't check the accuracy of the temperature, and but it seemed about 0.8C high. I've begun the testing of the device in the crawlspace under the house. Immediately noted a 70%+ humidity condition, so personally, that's something for me to deal with. It will also give an idea about harsher environments. I would like to also note that the I2C on the EVM handles 7m of CAT5 cable for signals without a problem.
I'm working on a project that utilizes this sensor and an MSP430 (just like this devkit). TI is working on releasing source code to do this (or so they said 6 months ago in the e2e forums, and then again when I inquired recently), but I ended up just taking a few days and doing it myself from scratch. Sensor is excellent.
I'm in Central Kentucky and still haven't recieved mine yet! Planning to test it outside with a RPi2 camera and make a nice video when we're done! We have a few more applications for the device, but they will be revealed when we make the video.
Patiently waiting arrival!