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PCB Forum Custom MPU9250 Circuit problem
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Forum Thread Details
  • Replies 10 replies
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  • esp32
  • problem
  • i2c
  • help
  • gyroscope
  • mpu9250
Related

Custom MPU9250 Circuit problem

Chuitoto
Chuitoto over 2 years ago

Hi! I've design a MPU9250 schematic for a project. But it's not working, I even can't find it with a I2C scanner code. And I think the soildering is fine (I had re-soilder many times)

I just connect the SDA, SCL connect to my ESP32 SDA, SCL pin with 2.2k pull up. VCC is in 3V3 as normal

imageimage

Do anyone know what I've done wrong ? Thank you!

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Top Replies

  • javagoza
    javagoza over 2 years ago in reply to Gough Lui +2
    You're right, I'm totally asleep, I'm going for a coffee :D
  • Gough Lui
    Gough Lui over 2 years ago +1
    It looks mostly fine to me. You might have to scope the I2C pins and check power - sometimes they can get unhappy if the power supply is non monotonic, noisy or has dips. Design wise, Pin 11 FSYNC should…
Parents
  • embeddedguy
    embeddedguy over 2 years ago

    I have some questions as I have also designed something with MPU6050

    Does ESP32 respond if you connect to any other i2c sensor? That is because that way you are sure that i2c bus is working on esp32 side.

    What is EXP pin your symbol?

    One suggestion is that you can use the typical operating circuit for your reference in section 4.2 of the datasheet.

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  • Gough Lui
    Gough Lui over 2 years ago in reply to embeddedguy

    I suspect EXP stands for the exposed rear paddle on the package ...

    - Gough

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  • Gough Lui
    Gough Lui over 2 years ago in reply to embeddedguy

    I suspect EXP stands for the exposed rear paddle on the package ...

    - Gough

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