LSM9DS1 power consumption

[savan8192]

Hi everyone,

I have been playing with LSM9DS1 for quite some time. Now I want to reduce its power consumption.

Currently Moteino + LSM9DS1 draws about 60mA. If I disabled gyro, mag and two of the axis of Accelerometer and the current draw has gone down to 35-40mA. On disconnecting the LSM9DS1 entirely, the same sketch consumes 2-10 mA. My Moteino draws about 10-50uA to send a data packet to a gateway.

LSM9DS1 should draw typically 4.5mA. Any idea where I am going wrong?

I have connected VDD, GND, SDA, and SCL directly.

Thanks in advance

[Felix]

LSM9DS1 should draw typically 4.5mA. Any idea where I am going wrong?

The VDD you have is 3.3V, correct?
Is this the LSM9DS1 LPL Breakout ?
All boards go through some basic testing to ensure they power up and can yield valid readings. But I do not test for current draw.
Is there anything particularly visually suspect with the board (perhaps a bridge or something like that)?

[savan8192]

Hi Felix, thanks for your reply.

The VDD you have is 3.3V, correct?

Yes

Is this the LSM9DS1 LPL Breakout ?

Yes

All boards go through some basic testing to ensure they power up and can yield valid readings. But I do not test for current draw.

Board might be just fine, I may have to change the power mode in sketch?? - The datasheet mentions following

In the LSM9DS1 the accelerometer and gyroscope have two operating modes available:
only accelerometer active and gyroscope in power down or both accelerometer and
gyroscope sensors active at the same ODR. Switching from one mode to the other requires
one write operation: writing to CTRL_REG6_XL (20h), the accelerometer operates in
normal mode and the gyroscope is powered down, writing to CTRL_REG1_G (10h) both
accelerometer and gyroscope are activated at the same ODR.

Is there anything particularly visually suspect with the board (perhaps a bridge or something like that)?

Don't think so, attaching the picture for your reference - https://drive.google.com/file/d/1i1jMS1Yrxk49ASpEd0RGLaRP1JFHW6q_/view?usp=sharing

[Felix]

Board looks good,
Have you tried it without the breadboard? Sometimes breadboards can cause all kinds of problems.

[savan8192]

Hi Felix, I have tried it without breadboard - on a Veroboard. I have sent you a PM.