gbeatty
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Understandable. Although, why is the metabase app warning me that there's a firmware update?
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Unfortunately, I don't have any examples that I am allowed to share publicly. You could try these 2. They use the complementary filter instead of the kalman filter, so they're significantly simpler.http://www.pieter-jan.com/node/11 http://www.code…
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fusing data is not a trivial matter for 9-axis sensor fusion (accelerometer, gyro, & magnetometer). There are entire third party libraries (mostly commercial) that perform the sensor fusion. It requires using a kalman filter with data sampled at…
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hey jakobve, I was having exactly the same problem you are: http://community.mbientlab.com/discussion/1510/inconsistent-streaming-data-rate#latest I came to the same conclusion you did. There's something wrong with the firmware/api. Even specifying …
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I'll try running the tests on my nexus 9 tonight
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Sony z3. Lollipop 5.5.1. In testing the phone and board are very close. Is there any error reporting if samples are getting dropped?
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I guess I'm assuming that because I can obviously get data at 78Hz, I shouldn't have any problem getting data at 50Hz (with the understanding that lots of samples will get grouped together into a single btle packet). What I've been seeing, though, i…
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As discussed in the previous thread, I'm not relying on the message timestamp because it isn't accurate. The problem in seeing now is that I'm not receiving the correct number of samples over a long period of time. For example, the numbers above wer…
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On the CPro, what's the fastest rate that I can stream accel and gyro if I'm also streaming mag at 20Hz?
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For anyone else looking into this product, something to consider:"During normal operation, this product can get hot enough to burn you. Take care when handling this product or other components connected to it."
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I actually really like that regulator that you posted. I hadn't found one that small. (size is a big factor in my application).
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I can also confirm that stainless steel encased batteries don't fix the problem. I demagnetized the pcb multiple times and installed a new panasonic battery. Unfortunately, shortly after beginning to discharge, the battery did develop a magnetic cha…
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Well, seeing as I really had no other option to get the magnetometer working correctly... I went ahead and connected a 3.7v LiPo battery to my CPro. I looked up the spec sheets for the various components and 3.7 v was within the operating range for …
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I'm getting the same feeling. It actually wouldn't be terrible if the magnetic charge remained constant, but it doesn't. At least then I could apply a calibration to mostly negate the effect. But ive seen the mag charge change dramatically in less t…
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Do you know a particular brand that has a stainless steel case? I'm currently using energizer batteries and have the same problem. The bigger problem I see is that every battery has a different iron content, so even without the magnitization problem…
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That's my hope too. Every other device I've worked with automatically performs corrections to account for metallic/magnetic components on the board. And these distortions seem to be pretty dramatic. I'm guessing the large coin cell battery is the ma…
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hey klangdon, Have you managed to get any useful data from the magnetometer yet?
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I'm having the same problem trying to stream data from all 3 modules on Android. Any idea on a time frame for a fix? Is there any work around for a short term solution?
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Thanks for the info Eric. Is it all the processors that can't work with multichannel data or just average?
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I was noticing the same thing when I just started looking at the mag data last night. My first thought is that the firmware doesn't perform any "soft iron" or "hard iron" corrections due to metal and magnetic components on the board that may be dist…
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sorry, missed your comment when posting. Is this something that would be available with future firmware updates, or is the SOC now powerful enough to perform the necessary computations. My main concern is that for good sensor fusion, I need high fre…
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Ideally what I'm looking for is something similar to Android's Rotation_Vector. Android uses the same sensors that are available on the CPRO to return a rotation axis and an angle of rotation about that axis. This can be converted to a quaternion if…