JPannetier
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Hello ,
I'm writing you about your IMU Brick 2.0.
I could use this module alone with a Wifi master Brick or I need to add a Master Brick ?
Thank you
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Hello everybody,
I'm trying to implement a code (Python) to get position x y z from IMU Brick 2.0 accelerometer, in live mode.
In the first step, I implemented the rotate accelerometer by quaternion to remove the gravity and rotation of my sensor.
After i integrate directly to have velocity and position :
example :
Vx(k) = Vx(k-1)+Ax(k)*dt
X(k) = X(k-1) + Vx(k)*dt
Nevertheless, into my accel. data I have an offset.
Somebody would have already implemented this type of code to remove the offset (drift) ? to get the position
I don't know if i must a kalman filter or other....
Thank you
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Super,
It's working now.
Sorry for my mistake.
Thank you very much for your support.
Best regard Jérôme
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I'm using a Brick IMU 2.0 with its example :
https://www.tinkerforge.com/en/doc/Software/Bricks/IMUV2_Brick_Python.html#simple
When I opened the source of Brick IMU 2.0, i can notice :
Into communication.c :
void get_quaternion(const ComType com, const GetQuaternion *data) {
GetQuaternionReturn gqr;
gqr.header = data->header;
gqr.header.length = sizeof(GetQuaternionReturn);
gqr.x = sensor_data.qua_x;
gqr.y = sensor_data.qua_y;
gqr.z = sensor_data.qua_z;
gqr.w = sensor_data.qua_w;
send_blocking_with_timeout(&gqr, sizeof(GetQuaternionReturn), com);
}
And into communication.h
typedef struct {
MessageHeader header;
int16_t w;
int16_t x;
int16_t y;
int16_t z;
} __attribute__((__packed__)) GetQuaternionReturn;
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Hi Photron,
Exactly.
I have a IMU Brick 2.0.
And I have this error when i'm using your example of IMU Brick 2.0....
Best regard
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Hello ,
I'm using Python 3.6.
I can run the example to emunerate my device.
When I'm using example_simple.py from IMU brick 2.0.
I have an error message from imu.get_quaternion()
in get_quaternion
return GetQuaternion(*self.ipcon.send_request(self, BrickIMU.FUNCTION_GET_QUATERNION, (), '', 'f f f f'))
File "C:\Users\JPannetier\Anaconda3\lib\site-packages\tinkerforge\ip_connection.py", line 1194, in send_request
return unpack_payload(response[8:], form_ret)
File "C:\Users\JPannetier\Anaconda3\lib\site-packages\tinkerforge\ip_connection.py", line 251, in unpack_payload
x = struct.unpack(f, data[:length])
error: unpack requires a buffer of 4 bytes
Thank you
Best regard
IMU Brick 2.0 + Wifi
in General Discussion
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Ok, thank.
I'll order this.