assert failed: i2c_ll_set_bus_timing i2c_ll.h:109 (scl_high > 13) about invensense-imu HOT 5 OPEN

It seems the ESP32 has some issue with I2C clock frequency.
Wire.setClock(400000);
If reduce it to 100K, the code can go on.

But another issue happen.
Error initializing communication with IMU

from invensense-imu.

That's just the code's way of telling you that you aren't communicating with the sensor. The ESP32 core software used to have a problem with endTransmission(false) - I'm not sure if they've fixed it yet on their end, but you may need to update this library to use endTransmission() instead of endTransmission(false). Unfortunately, the sensor data sheet tells us to use that as part of the communication protocol, but it's up to the chip manufacturers to implement it correctly in their core software - this is just a work around that I know has helped people in the past.

It could also be an issue with your hardware setup, so I would run an I2C scanner example to check that you can see the sensor.

from invensense-imu.

Hi @flybrianfly

Thanks for your support.
The I2C speed issue still there(100kHz or slower).

However, the AK8963 function had new updates. I tried many codes and modified code for pass-through. ALL are not successful.
I remember somebody had a similar problem and fixed the issue with a sample. It became true in my case.
Why do a lot of problems at AK8963 only? I can't believe the reliability of TDK to such a level.

from invensense-imu.

Yeah Ic2047
You would think that someone selling a product would have an interest in making sure people could use it. Unless they had some anti-competitive, anti free-market reason for doing so.
Crazy World.

from invensense-imu.

@lc2047, I would try with a different microcontroller if you have one available - I don't have any issues with the Teensy and STM32 microcontrollers. I do think the I2C library is not as well implemented in the ESP32 core. Alternatively, you could try using SPI instead of I2C.

Finally, check that you got the MPU-9250 from a reputable source, there's a lot of fake ones out there.

from invensense-imu.