Reliable MPU9250
luizamanfrini opened this issue · 8 comments
luizamanfrini commented
Hey Kris, how are you?
Where can I get reliable MPU-9250. I've been struggling with mine because and I think they are fake.
Thank you!
kriswiner commented
As you might know, the MPU9250 are out of production since January 2020. I
have some real ones, and I have some fake ones. You can take your chances
and order from Aliexpress, but this is hit and miss...
…On Thu, Dec 3, 2020 at 10:27 AM luizamanfrini ***@***.***> wrote:
Hey Kris, how are you?
Where can I get reliable MPU-9250. I've been struggling with mine because
and I think they are fake.
Thank you!
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luizamanfrini commented
Thank you Kris! I've been having some trouble connecting to the magnetometer, that's why I think my sensor might be fake. Its who am I is 0xFF instead of 0x48. Also, I am having some trouble to use is as SPI.
kriswiner commented
Yes, there are some Chinese variants that only have the accel/gyro...
If you just need a few I can sell them to you...
…On Thu, Dec 3, 2020 at 10:35 AM luizamanfrini ***@***.***> wrote:
Thank you Kris! I've been having some trouble connecting to the
magnetometer, that's why I think my sensor might be fake. Its who am I is
0xFF instead of 0x48. Also, I am having some trouble to use is as SPI.
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luizamanfrini commented
Would you ship to Brazil?
kriswiner commented
Yes, but is $14.95 first class airmail good/reliable enough? Maybe cheaper
for you to buy from aliexpress....
…On Thu, Dec 3, 2020 at 10:38 AM luizamanfrini ***@***.***> wrote:
Would you ship to Brazil?
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GitMoDu commented
Any thoughts on a successor chip, for the future?
kriswiner commented
Yes, TDK makes the ICM20948
<https://invensense.tdk.com/products/motion-tracking/9-axis/icm-20948/>
which is literally the successor to the MPU9250. You can get 2 degree
heading accuracy using its embedded DMP, so overall a pretty good choice.
However, I don;t like the dual power rail (1.8 and 3.3 V required) and I
don;t like loading a binary blob to get fusion performance. So we don;t use
this.
We use instead ST Micro's LSM6DSM accel/gyro combo sensor and LIS2MDL
magnetometer. Lately we have started using the MMC5983A
<https://www.digikey.com/en/products/detail/memsic-inc/MMC5983MA/10452795?s=N4IgTCBcDaILZwMYFYCcAOAzCAugXyA>
since it offers much higher resolution and much lower noise.
More info here
<https://hackaday.io/project/160283-max32660-motion-co-processor>.
…On Mon, Dec 7, 2020 at 2:23 AM André ***@***.***> wrote:
Any thoughts on a successor chip?
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GitMoDu commented
I'll look into those new ICs. I agree with having magic blobs is counter to the embedded mentality of absolute control.
Thank you very much, your efforts to make these complicated devices usable have been wonderful!