Pololu AltIMU-10 v5 not working (Teensy3.6)

[Anton_H]

Hi everyone,

The sensor isn't working with my Teensy3.6. The Serial Monitor is always saying that it couldn't detect the sensor. I tried both to connect the power supply to the VIN and the VDD port, both didn't worked. I tried with 10kOHM resistor and without resistors.
Can someone help me please?

Thanks in advance.

 

[PaulStoffregen]

Connect 3.3V to both VIN and VDD. Only one of them is not enough. Both need power.

(I looked at the info here... if this isn't the right product, maybe a more specific question would be a good idea)
https://www.pololu.com/product/2739/resources

 

[Anton_H]

Still got the same ...

 

[PaulStoffregen]

I'm trying to understand how it's all connected, but none of the photos shows everything.

Looks like you have have the SDA & SCL signals going to 2 resistors, rather than directly to the sensor, and the resistors might be connected in series rather than as pullups. This particular board has the resistors on it, so you do not need to add them. Just connect SDA on Teensy directly to SDA on the sensor. Same for SCL.

As a quick sanity check, use a voltmeter. When the program isn't running (load a LED blink onto Teensy) both signals should measure 3.3V. So should the 2 power pins.

 

[Frank B]

The picture with the resitors looks weird.
It does not look like they are used as pull-up - instead it looks like you inserted them into the clock and data-line ?

Edit: oops. Paul was faster..

 

[Anton_H]

Ok, that worked. Thanks guys!