Reliable MPU9250

Question

Reliable MPU9250

Opened this issue 4 years ago · 8 comments

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!

Answer 1 · 2020-12-03T18:31:06.000Z

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...

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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! — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#445>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABTDLKQHHQM4MMQBEGXJTN3SS7J7TANCNFSM4UMLTCKA> .

Answer 2 · 2020-12-03T18:34:59.000Z

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.

Answer 3 · 2020-12-03T18:37:06.000Z

Yes, there are some Chinese variants that only have the accel/gyro... If you just need a few I can sell them to you...

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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. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#445 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABTDLKXC7PI7EJ2PQH2CB23SS7K6FANCNFSM4UMLTCKA> .

Answer 4 · 2020-12-03T18:38:19.000Z

Would you ship to Brazil?

Answer 5 · 2020-12-03T18:41:46.000Z

Yes, but is $14.95 first class airmail good/reliable enough? Maybe cheaper for you to buy from aliexpress....

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On Thu, Dec 3, 2020 at 10:38 AM luizamanfrini ***@***.***> wrote: Would you ship to Brazil? — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#445 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABTDLKXJEOB2XJJGUMF7CTDSS7LKVANCNFSM4UMLTCKA> .

Answer 6 · 2020-12-07T10:23:23.000Z

Any thoughts on a successor chip, for the future?

Answer 7 · 2020-12-07T16:28:58.000Z

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>.

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On Mon, Dec 7, 2020 at 2:23 AM André ***@***.***> wrote: Any thoughts on a successor chip? — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#445 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABTDLKTILPKWFBKCFKENH73STSUKZANCNFSM4UMLTCKA> .

Answer 8 · 2020-12-15T12:32:29.000Z

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!