Hi all,

Thank you for your comments and advise.

My M5Stack work fine too after update library by 0x1abin's advise.

Hi,

I bought M5Stack Gray for motion sencing of wheelchair.

I installed M5Stack library and sketched on my Mac and basic sketch worked fine.
Also I tried to install sample sketch "MP9250BasicAHRS", but it didn't.

• comple and download into M5Stack was work fine
• Then I checked behavior of M5Stack via Serial Monitor and following message was displayed.

MPU9250 I AM 0 I should be 71
MPU9250 is online...
x-axis self test: acceleration trim within : 2.2% of factory value
y-axis self test: acceleration trim within : 8.4% of factory value
z-axis self test: acceleration trim within : 1.6% of factory value
x-axis self test: gyration trim within : -0.0% of factory value
y-axis self test: gyration trim within : 0.0% of factory value
z-axis self test: gyration trim within : 0.8% of factory value
Guru Meditation Error: Core 1 panic'ed (IntegerDivideByZero). Exception was unhandled.
Core 1 register dump:
PC : 0x400d3ba5 PS : 0x00060730 A0 : 0x800d1412 A1 : 0x3ffb1f20
A2 : 0x3ffc2494 A3 : 0x3ffc2520 A4 : 0x3ffc252c A5 : 0x3ffb1f50
A6 : 0x00000000 A7 : 0x00000000 A8 : 0x00000000 A9 : 0x00000000
A10 : 0x00000000 A11 : 0x00000000 A12 : 0x00000002 A13 : 0x00000002
A14 : 0x3ffb1f50 A15 : 0x00000000 SAR : 0x0000001c EXCCAUSE: 0x00000006
EXCVADDR: 0x00000000 LBEG : 0x4000c2e0 LEND : 0x4000c2f6 LCOUNT : 0x00000000

It look like that MPU9250 didn't calibrate.
Is this following line correct?

// Calibrate gyro and accelerometers, load biases in bias registers
IMU.calibrateMPU9250(IMU.gyroBias, IMU.accelBias);

I've no idea to fix this problem and will you help or give advises?

Thank you,