Motion sensor for 2B?

[captain.chaos]

Hi

Being a bit of a dimwhit I posted this question in the Series 2 section... Doh!!!

I'm thinking of buying the 2B unit, is there a motion sensor trigger for the 2B unit? I want use both audio & motion triggers (not always at the same time), but I don't want to buy two boxes.

Thanks in advance

Regards

Captain Chaos.

[admin]

There isn't yet, but we are working on a plug in motion sensor module for the 2B.

Si

[LondonSubNigel]

And, thought it won't work with audio, one of the next things on my list for the android control software is a trigger based on the device movement.

[captain.chaos]

Hi

Thanks for the info. It looks as if I'll be buying a 2b, soon!

Being the resourceful type, I saw this, Spynet laser trip wire. (http://www.gizmag.com/spynet-laser-trip ... tem/20026/) I think that I can position the laser tripwire close to the body so if the person moves they will break the infrared beam and set the audible alarm off, triggering the audio unit through the microphone. It won't be as good as a Doppler motion sensor built for the 2B unit though.

Cheers

Pete

[LondonSubNigel]

I'm now experimenting with motion control, using the accelerometer in the android device. This is what the software side of it looks like:



The first thing you have to do is calibrate the sensor for a range of movement - even with a device sitting on a flat surface, the accelerometer reading will tend to vary, so the Calibrate button captures ten seconds of readings. Once done, anything outside that range will trigger a movement event, if the 'Motion' control is turned on.

That has the side effect that you can allow a limited range of movement - for example, put the phone on someone's body, then calibrate, and the normal movement of breathing etc will be taken into account. A trigger will happen only if they move more than that.

The pop up in the middle of the screen lets you select one of the favourites stored in the software, and the choices below are for either a two second or a five second jolt.

If anyone's brave enough to try this, let me know... this is a first attempt at motion detection.

[LatexKing]

That's great news.
I will be very happy to try the new version.
Please let me know how I can try it out.

Thanks!
LK

[birdburdy]

I'm up for trying this. Actually I've been making my own motion sensor which uses an arduino with an accelerometer.

[LatexKing]

@birdburdy - although it sounds like a whole lots of fun as DIY project, I think you'll find it hard to beat the Android solution,
it's almost fully ready made for us - a small device, packed with all the sensors you can dream of, has all the communication option, ready made
programing interface etc.
Nigel's app works well, you can see my detailed post on smartstim. I'm very hopeful he can implement soon a solution that tests the magnitude of
the combined acceleration vector, as right now it is mostly sensitive to change of orientation in regard to the gravity acceleration. Again, see my mentioned
post for details.

take care.
LK

[neo80]

and the choices below are for either a two second or a five second jolt.

Maybe a slider from 0.1 sec to 10 seconds would be better.

[birdburdy]

and the choices below are for either a two second or a five second jolt.

Maybe a slider from 0.1 sec to 10 seconds would be better.

Just to provide feedback on the motion-sensor jolt setting of the android app, the 2 second feature is very limited since the output seems to be smoothed and 2s often isn't long enough for the device to reach the desired output level.

5s on the other hand is a bit too long, maybe 3.5s would be good?