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Here's a possible explanation for the unevenness of the iPhone 5s motion sensor

Last week we commented that the motion sensor of the iPhone 5s is poorly calibrated and that, therefore, the device has a significant gap. Behold, Eagle Jones (PhD and CEO of RealityCap) brought a possible explanation for this. I already advance that the subject is highly technical for the most knowledgeable of the subject, I suggest reading the complete post of Jones to capture all the details.

Unevenness of iPhones 5s

Image credit: US Gizmodo.

In short, the fault of the accelerometer. In iPhones of past generations, Apple used a sensor from STMicroelectronics (LIS331DLH); now, on the iPhone 5s, the company has switched to one from Bosch-Sensortech (BMA220). According to Jones, two things matter in this piece of hardware: noise density (noise density) and vis (bias). The noise density of the Bosch sensor is very similar to that of STMicroelectronics; already vis, no.

Jones explains that the typical measurement of the STMicroelectronics accelerometer view is +/- 20mg (milli-g, or a thousandth of standard gravity), while that of the Bosch sensor of +/- 95mg. All of this was confirmed by tests carried out by him translating, +/- 20mg represents a difference of -1 degree of accuracy in detecting the slope, then +/- 95mg matches the -5 degrees of inclination found by many consumers.

The good news that developers can compensate for this gap by incorporating a calibration process within their apps, RealityCap is working on a code to make things easier. In addition, Apple would also be able to fix this through a software update that we hope will happen in the not too distant future.

(via Gizmodo US)