Axoloti and sensors

[Jules]

hi there,
i’m working on art installation. I connected an accelerometer and ultra sonic distance sensor to my axoloti and i need some help.
First of all i would like to read 3 axes information for the accelerometer and distance parameter for the distance sensor.
Thank you !

[janvantomme]

For an ultrasonic sensor, you might need program a custom object since those sensor send out a digital signal. It's easier to work with an infrared sensor like this one: https://www.amazon.com/GP2Y0A21YK0F-GP2Y0A21-Infrared-Proximity-Distance/dp/B075FPR2VX?SubscriptionId=AKIAILSHYYTFIVPWUY6Q&tag=duckduckgo-d-20&linkCode=xm2&camp=2025&creative=165953&creativeASIN=B075FPR2VX

Accellerometers can be connected like in this breadboard setup: http://www.axoloti.com/examples/general-input-and-output/. The incoming values will be positive only (0-3.3V), so you might need to convert them to a bipolar signal using the conv/unipolar2bipolar object.

[Jules]

hi, thanks for you answer
For the ultrason sensor it's a binary signal but the time of the trig move proportionaly to the distance so i think it's possible to sampling this value (trig time) ?
Our accelerometer send SPI, i think i'm going to buy accelerometer with analogique output, if can't do in other way ?
Thanksss

[janvantomme]

You can indeed sample the incoming binary signal, but you'll need to convert the data to something that will make sense. That's why you will need a custom programmed object.

Reading the data of the accelerometer over SPI is possible, but you'll also need a custom object for that.