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sphero-inc / Sphero-iOS-SDK

🚫 DEPRECATED: Sphero™ is the amazing robotic ball ( sphero.com ) created by Orbotix, this is the repository for the iOS SDK for Sphero™. Visit dev site for more information:
http://sdk.sphero.com
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RKMagnetometerData #47

Closed citysite102 closed 7 years ago

citysite102 commented 8 years ago

Hello, I try to get the Magnetometer sensor data from the device with following data streaming mask: RKDataStreamingMask mask = RKDataStreamingMaskAccelerometerFilteredAll | RKDataStreamingMaskGyroXFiltered | RKDataStreamingMaskGyroYFiltered | RKDataStreamingMaskGyroZFiltered | RKDataStreamingMaskMagnetometerZFiltered | RKDataStreamingMaskIMUAnglesFilteredAll; But I'll get an error as following. 2016-03-12 4 24 19 with the error message like *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[_NSInlineData getBytes:range:]: range {20, 1} exceeds data length 20' However, if I remove RKDataStreamingMaskMagnetometerZFiltered from the mask, everything just works perfect : ], is there any information or restriction about the Magnetometer sensor data?

zenelk commented 7 years ago

I'll get this on the queue to be looked at. I can't think of anything for you to try in the meantime, however.

zenelk commented 7 years ago

Hey there, so in reviewing the stack, the reason this is occurring is that magnetometer hasn't actually been present in robots since the older versions of Sphero. This crash is happening because you're requesting data that doesn't exist in the packet. I can get this on the board to have a bounds check, but my guess is that it will be a really low priority. For now you should just not request the data.