MPU-9250 on ESP8266

[luke-ff]

I've troubles getting valid readings from MPU-9250. I'm using MPU9250BasicAHRS.ino as base. To get the code running on an ESP8266 I had to remove display-related code (as I have no display ;-) and the (not used?) variable intPin :

// Set up the interrupt pin, its set as active high, push-pull
// pinMode(intPin, INPUT);
// digitalWrite(intPin, LOW);`

The output for self test and acceleration look strange.

MPU9250 I AM 71 I should be 71
MPU9250 is online...
x-axis self test: acceleration trim within : -109.6% of factory value
y-axis self test: acceleration trim within : 81.1% of factory value
z-axis self test: acceleration trim within : -100.0% of factory value
x-axis self test: gyration trim within : 77.6% of factory value
y-axis self test: gyration trim within : 23.1% of factory value
z-axis self test: gyration trim within : -100.0% of factory value
MPU9250 initialized for active data mode....
AK8963 I AM 48 I should be 48
AK8963 initialized for active data mode....
X-Axis sensitivity adjustment value 1.18
Y-Axis sensitivity adjustment value 1.19
Z-Axis sensitivity adjustment value 1.14
ax = -2000.00 ay = -1862.79 az = -2000.00 mg
gx = -0.04 gy = 0.21 gz = 0.05 deg/s
mx = -819 my = 358 mz = -315 mG
q0 = 1.00 qx = 0.00 qy = 0.00 qz = 0.00
Yaw, Pitch, Roll: -13.80, 0.00, 0.00
rate = 0.21 Hz
ax = -2000.00 ay = -1992.92 az = -2000.00 mg
gx = -0.10 gy = 0.02 gz = 0.11 deg/s
mx = -810 my = 346 mz = -324 mG
q0 = 1.00 qx = 0.00 qy = 0.00 qz = 0.00
Yaw, Pitch, Roll: -13.80, 0.00, 0.00
rate = 783.71 Hz

any hints?

Thanks in advance...

[kriswiner]

Yes, the loop is waiting for an interrupt flag before it will update any data...

https://github.com/kriswiner/ESP8285/tree/master/MPU9250

On Tue, Nov 17, 2020 at 1:54 PM Andreas Lackner notifications@github.com wrote:

I've troubles getting valid readings from MPU-9250. I'm using MPU9250BasicAHRS.ino as base. To get the code running on an ESP8266 I had to remove display-related code (as I have no display ;-) and the (not used?) variable intPin :

// Set up the interrupt pin, its set as active high, push-pull // pinMode(intPin, INPUT); // digitalWrite(intPin, LOW);`

The output for self test and acceleration look strange.

MPU9250 I AM 71 I should be 71 MPU9250 is online... x-axis self test: acceleration trim within : -109.6% of factory value y-axis self test: acceleration trim within : 81.1% of factory value z-axis self test: acceleration trim within : -100.0% of factory value x-axis self test: gyration trim within : 77.6% of factory value y-axis self test: gyration trim within : 23.1% of factory value z-axis self test: gyration trim within : -100.0% of factory value MPU9250 initialized for active data mode.... AK8963 I AM 48 I should be 48 AK8963 initialized for active data mode.... X-Axis sensitivity adjustment value 1.18 Y-Axis sensitivity adjustment value 1.19 Z-Axis sensitivity adjustment value 1.14 ax = -2000.00 ay = -1862.79 az = -2000.00 mg gx = -0.04 gy = 0.21 gz = 0.05 deg/s mx = -819 my = 358 mz = -315 mG q0 = 1.00 qx = 0.00 qy = 0.00 qz = 0.00 Yaw, Pitch, Roll: -13.80, 0.00, 0.00 rate = 0.21 Hz ax = -2000.00 ay = -1992.92 az = -2000.00 mg gx = -0.10 gy = 0.02 gz = 0.11 deg/s mx = -810 my = 346 mz = -324 mG q0 = 1.00 qx = 0.00 qy = 0.00 qz = 0.00 Yaw, Pitch, Roll: -13.80, 0.00, 0.00 rate = 783.71 Hz

any hints?

Thanks in advance...

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/kriswiner/MPU9250/issues/441, or unsubscribe https://github.com/notifications/unsubscribe-auth/ABTDLKX5LC2W6STN5NA4BXLSQLWI7ANCNFSM4TZEROXQ .

[luke-ff]

Yes, the loop is waiting for an interrupt flag before it will update any data...

But this code is lacking any interrupt handling: https://github.com/kriswiner/MPU9250/blob/master/MPU9250BasicAHRS.ino

I also can't find any other usage of intPin other than pinMode.

Also self test is inside setup, so I asume intPin has nothing to do with self test ...

[kriswiner]

Line 388

On Tue, Nov 17, 2020 at 2:11 PM Andreas Lackner notifications@github.com wrote:

Yes, the loop is waiting for an interrupt flag before it will update any data...

But this code is lacking any interrupt handling: https://github.com/kriswiner/MPU9250/blob/master/MPU9250BasicAHRS.ino

I also can't find any other usage of intPin other than pinMode.

Also self test is inside setup, so I asume intPin has nothing to do with self test ...

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/kriswiner/MPU9250/issues/441#issuecomment-729244797, or unsubscribe https://github.com/notifications/unsubscribe-auth/ABTDLKSIMDQTYULBECYRCU3SQLYJ3ANCNFSM4TZEROXQ .

[luke-ff]

Sorry, but I don't get it... what has this line if (readByte(MPU9250_ADDRESS, INT_STATUS) & 0x01) to do with intPin ?

[kriswiner]

comment out this line and you should start getting data

On Tue, Nov 17, 2020 at 2:48 PM Andreas Lackner notifications@github.com wrote:

Sorry, but I don't get it... what has this line if (readByte(MPU9250_ADDRESS, INT_STATUS) & 0x01) to do with intPin ?

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/kriswiner/MPU9250/issues/441#issuecomment-729260211, or unsubscribe https://github.com/notifications/unsubscribe-auth/ABTDLKSDPUZV35U26QX4SULSQL4SPANCNFSM4TZEROXQ .

[luke-ff]

Please have a second look at the first posting. I get data, but self test looks invalid. And accelerations show 2g...

[kriswiner]

Your accel looks broken. Please try the sketche I linked to.

On Tue, Nov 17, 2020 at 2:53 PM Andreas Lackner notifications@github.com wrote:

Please have a second look at the first posting. I get data, but self test looks invalid. And accelerations show 2g...

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/kriswiner/MPU9250/issues/441#issuecomment-729262465, or unsubscribe https://github.com/notifications/unsubscribe-auth/ABTDLKTQKR5CBPI43LMFP2TSQL5HJANCNFSM4TZEROXQ .

[luke-ff]

This sketch doesn't compile for the ESP8266. There is also a lot of stuff I don't need. Method MPU9250SelfTest is identical to the code I use atm. I'll try to get a new sensor....

[kriswiner]

The self test code here is not correct. The actual self test uses only the last byte of data IIRC, check the documentation.

https://github.com/kriswiner/MPU9250/blob/master/Documents/AN-MPU-9250A-03%20MPU-9250%20Accel%20Gyro%20and%20Compass%20Self-Test%20Implementation%20v1%200_062813.pdf

I would be more concerned about the too-high accel values, looks broken. You can looks at the accel register values to be sure it is not a conversion error...but yes, a second (known good) MPU9250 will tell.

On Tue, Nov 17, 2020 at 3:07 PM Andreas Lackner notifications@github.com wrote:

This sketch doesn't compile for the ESP8266. There is also a lot of stuff I don't need. Method MPU9250SelfTest is identical to the code I use atm. I'll try to get a new sensor....

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/kriswiner/MPU9250/issues/441#issuecomment-729268053, or unsubscribe https://github.com/notifications/unsubscribe-auth/ABTDLKXJFP75XSDUSZTZADTSQL62DANCNFSM4TZEROXQ .