gammonm

Comments

• Thanks for your help. This is maybe a silly question but is the MetaHub meant to be an intermediate device? In other words would I be able to connect the Android phone to the metahub and then have a smooth connection to many sensors' Quaternion valu…

  in Question about connecting many sensors to a phone simultaneously vs. something like the MetaHub? Comment by gammonm September 2019
• Increasing the Acc/Gyro ranges did the trick. Not sure why I didn't think to try this before posting. If anyone else is having a similar issue make sure your ranges are set to be large enough for your application. I actually ended up using this site…

  in Quaternion Drift Problem Comment by gammonm June 2019
• I'm going to try to up the Gyro speed and see if that helps.

  in Quaternion Drift Problem Comment by gammonm June 2019
• @Eric said: Quantify "higher speeds". What are your sensor fusion settings? I would have to do further testing to be able to quantify this. I just noticed that as I increased the speed on the treadmill the drift got quite bad as yo…

  in Quaternion Drift Problem Comment by gammonm June 2019
• @Laura said: @gammonm You are exactly right, in our own application we use an averager to "smooth out the data" and a filter to "remove noise". You can do the same Thanks Laura. I have also now extended the above example to two legs …

  in Smoothing out sensor fusion data in real time? Comment by gammonm June 2019
• I'm not sure that this matters but just for the record: Development is being done on Android, a background service is run on the phone to pull data from the sensors which then passes the data to a Unity application running in the foreground for t…

  in Smoothing out sensor fusion data in real time? Comment by gammonm June 2019
• Okay thanks that's good to know. I just find it odd that it worked perfectly for so long and then seemingly randomly stopped working. Maybe this is a silly question but is it possible that I fried the bluetooth hardware in the phone by trying to str…

  in BluetoothGatt Problems Comment by gammonm May 2019
• As mentioned, we have new devices on the way to the lab but while they're in transit I can't really work on my project. I'm hoping when they arrive that will just solve the problem but I was hoping for suggestions in the mean time.

  in BluetoothGatt Problems Comment by gammonm May 2019
• `public class MainActivity extends Activity implements ServiceConnection { private BtleService.LocalBinder serviceBinder; private final String MW_MAC_ADDRESS_1 = "C4:F1:0F:4F:7B:3A"; private final String MW_MAC_ADDRESS_2 = "EB:36:F0:3E:4D:4E…

  in What's the best way to extend the "starter" module to read from multiple boards at once? Comment by gammonm May 2019
• This ended up being more trouble than its worth so I just wrote my own script. If anyone is trying to do something similar in the future (stream 3 quaternions simultaneously) my code is below. It's very bare bones but gets the job done. Basically it…

  in What's the best way to extend the "starter" module to read from multiple boards at once? Comment by gammonm May 2019
• I'm referring to the starter script located here: https://github.com/mbientlab/MetaWear-Tutorial-Android/tree/master/starter My attempt so far involves keeping count of how many devices have been connected and if it is not yet the desired amount…

  in What's the best way to extend the "starter" module to read from multiple boards at once? Comment by gammonm May 2019
• For the record, this is my first time doing any Android programming whatsoever so it's been a challenge. I feel like my goal should be easy to accomplish if I knew what I was looking for so I'm hoping there's a simple solution.

  in What's the best way to extend the "starter" module to read from multiple boards at once? Comment by gammonm May 2019
• I have now tested on another lab-mate's Huawei device and it also works. Seems to just be the Google devices that are a problem.

  in Problem connecting "starter" project to particular Android devices Comment by gammonm April 2019