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POAndroid - accelerometer on motodroid 1 reports incorrect values at first?
 

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  1. POAndroid - accelerometer on motodroid 1 reports incorrect values at first?
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    <p>So I'm writing an app that detects movement, and needs to be calibrated to various movements. Over the past few days, I've noticed that right after a <code>SensorEventListener</code> is registered, <code>onSensorChanged(SensorEvent)</code> throws out incomplete (and therefore erroneous) <code>.values[]</code>. This behavior screws up my calibration process, and the amount of force that signifies a movement is way too high. I have verified that this is the case for every accelerometer logging app I have downloaded and tested, so its not an error specific to my code. I think this might be caused by bad hardware (possibly specific to my moto droid 1), or a software bug by the custom ROM I'm using (Simply Stunning 4.9, from Froyo 2.2.1 source.)</p> <p>Example:</p> <pre><code>sensorManager.registerListener(this, sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SENSOR_DELAY); .... onSensorChanged(SensorEvent event){ // event.values[0] = 0.0 // event.values[1] = -0.47 // event.values[2] = 0.0 } .... onSensorChanged(SensorEvent event){ // event.values[0] = 0.08 // event.values[1] = -0.47 // event.values[2] = 0.0 } .... onSensorChanged(SensorEvent event){ // event.values[0] = 0.08 // event.values[1] = -0.47 // event.values[2] = 10.1 } </code></pre> <p>As you can see, it often takes 2 readings before all of the correct values are accessible.</p> <p>Can anyone confirm or deny this behavior on the moto droid 1 or other phone? Do you think a good solution is to just drop the first 2 or 3 readings so that they don't warp my calibration?</p>
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    1. COSimilar experience with two motorola droids.
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