leinardi / androidthings-drivers Goto Github PK

First of all thanks for all the hard work and effort to provide all these drivers.
In in the following setup:

• raspberry pi 3
• android things
• lsm9ds1

The accelerometer values in the device reference that I'm reading are -0.45, -0.02, 9.48 on the x, y, z axes. These look to be barely off.
However the magnetic field is way off. I'm getting 0.26, 0.19, -0.14 in the callback listener for Sensor.TYPE_MAGNETIC_FIELD. Inspecting the readRawMagnetometerData method shows in the result array 185, 1329, -994.
To make things even more confusing for me the Android documentation specifies that the values returned for the magnetic field are in uT https://developer.android.com/reference/android/hardware/SensorEvent.html#values

Did I end up with a bad LSM9D1 or I'm doing some wrong assumption on the expected values?

I use the same code as simple code ,I didn't change the distance of the sensor.
get below logs :
019-12-19 20:17:24.972 300-462/system_process D/WificondControl: Scan result ready event
2019-12-19 20:17:26.985 2233-2233/cn.dbyl.study I/CarSys: sensor changed: [-1.000000]
2019-12-19 20:17:28.996 2233-2233/cn.dbyl.study I/CarSys: sensor changed: [12.862785]
2019-12-19 20:17:31.009 2233-2233/cn.dbyl.study I/CarSys: sensor changed: [-1.000000]
2019-12-19 20:17:33.023 2233-2233/cn.dbyl.study I/CarSys: sensor changed: [11.111112]
2019-12-19 20:17:35.033 2233-2233/cn.dbyl.study I/CarSys: sensor changed: [75.510902]
2019-12-19 20:17:35.035 2233-2233/cn.dbyl.study I/CarSys: sensor changed: [74.051178]

I am having a problem when using the DS3231 clock module: I can read and write the RTC clock module normally, and I connect the RTC clock module to the Raspberry Pi, reboot the Raspberry Pi, the date read again is wrong, not the time that I previously written in.
But as long as the Raspberry Pi does not reboot, the time I read and write is correct.
Have you encountered this problem?
@leinardi

Hi,

Nice work on your Java library of sensors. You may be interested in the ones I have written for my own Java device I/O library.
See:

• https://github.com/mattjlewis/diozero/tree/master/diozero-core/src/main/java/com/diozero/devices
• https://github.com/mattjlewis/diozero/tree/master/diozero-imu-devices/src/main/java/com/diozero/imu/drivers/invensense

I'm think I should make it easier to port my code to Android Things, should be simply a matter of providing a similar I2C / SPI API.

Matt