Matrix user forums

Re: i2c address and pads It works. Re: temperature value I used the code from the post of medelec35 » Wed Sep 16, 2015 (for DS18B20) - Read Celsius as Int - Celsius = Celsius * 49 / 10 - CelsiusString = ToString$ (Celsius) - Length = Length$ (CelsiusString) - TempString = Left$ (CelsiusString,Lengt...

Thank you Benj

Will try

Is it possible to use CJMCU-75 temp module with LM75b component?
And if it is:
- how to configure the i2c pads on this module to get the i2c address correct?

When the mouse is over the CallComponentMacro->MPU9250->CollectXYZData
The floating message says:
Collect the data from the local accelerometer buffers.

Probably it should mean:
Collect the data from the local acc, gyro and magnetometer?

Question to Matrix team I managed to calibrate 9250 Acc/Gyro. To calibrate the 9250 magnetometer I need access to mX, mY, mZ. However 9250 component allow only to CollectXYZdata for Acc and Gyro. Magnetometer access is restricted to: UpdateCompassData and ReadingBearing raw values. Does it mean I ha...

FC8_9250_Error_3.jpg As Benj mentioned before: The magnetometer setup is a little bit complex than the gyroscope and the accelerometer. I did some recearch and found: MPU9250 is one of the most advanced combined Accelerometer, Gyroscope and Compass small size sensors currently available. They have ...

Thanks Benj.
After I updated the FC8 I have the same results.
However.
If your setup works (now) I have to look at my hardware/software setup.
I am not sure what do I do wrong (and what do I have to change) but I will update this post shortly.

Thank you Benj for help.

What is done:
FC8 -> updated

Results:
UpdateCompassData flag returns 1. (OK now.)
The program is not frozen and Acc/Gyro readings -> OK

However:
Magnetometer ->CollectXYZData->Returns Zero (not X, not Y, not Z do return any data)

I think the flag can be 0 or 1.
I did what you said and increased the time inside the accelerometer loop and magnetometer loop.
Accelerometer returns 1.
Magnetometer returns nothing. Not 1, not 0. No readings at all. I think this is a problem
Thanks mate.

FC8 project file

Gear: Arduino Uno R3(smd), LCD20x4(i2c), mpu9250(Unbranded/Generic)
What is done:
FC8 is updated
Uno is tested in different project - OK
LCD20x4 is tested - OK
The same mpu9250 tested with same Uno- in Arduino IDE (Brian R Taylor project:mpu_9250_bolder_library) - OK

Any help?

Test results

Thank you Benj.
All good now.

Problem: When testing ssd1306(i2c) with Uno in FC8 I noticed that graphics have been displayed OK, but not the text or numbers. Used: UnoR3_smd(Chinese), ssd1306(128x64). File: attached example of FC8_ssd1306_1. FC8 compilation: no errors. Programmer: STK-600 What is done Uno board changed to a new ...

I found the Arduino boards/devices. They are hidden first. You have to go to: Build->Project options->Choose a target->Free->Arduino Uno (as board). Attach you Mega2560 project to Uno (first). Close it. And do again: Build->Project options->Choose a target->Free-> Now you will have all Arduino board...

Before I bought FC8 I asked Managing Director (Sales & Marketing) Liam Walton (Tue, 29 May 2018 ) why Arduino is separated from AVR and do I need to buy both: AVR and Arduino. The answer was: I t sounds like you do not need to order AVR, but to be clear about what chips you are using, have a look at...

Before I bought FC8 I asked Managing Director (Sales & Marketing) Liam Walton (Tue, 29 May 2018 ) why Arduino is separated from AVR and do I need to buy both: AVR and Arduino. The answer was: I t sounds like you do not need to order AVR, but to be clear about what chips you are using, have a look at...

Probably this is the answer:
Because of drift and noise components at low angular rates, MEMS-based gyroscopes are typically not used directly in the calculation of heading...
https://www.sensorsmag.com/components/c ... on-effects

Ebay module: Chinese LSM303DLHC e-Compass 3 axis Accelerometer and 3 axis Magnetometer. Module connections: Vin (5v), Gnd, SDA->SDA (A4 on 'classic' Arduinos), SCL->SCL (A5 on 'classic' Arduinos), Int1 to Uno board A0. Note: Int2 is not connected. Without using the tilt compensation the azimuth valu...