Arduino i2c address not getting identified.

Hi,

I am using Arduino Due for my project in Matlab 2022a on windows 11. I am using the Arduino engineering kit latest update also. I am getting the following error:

>> a = arduino('COM5', 'Due'),

a =

arduino with properties:

Port: 'COM5'

Board: 'Due'

AvailablePins: {'D2-D53', 'A0-A11'}

AvailableDigitalPins: {'D2-D53', 'A0-A11'}

AvailablePWMPins: {'D2-D13'}

AvailableAnalogPins: {'A0-A11'}

AvailableI2CBusIDs: [0, 1]

AvailableSerialPortIDs: [1, 2, 3]

Libraries: {'I2C'}

Show all properties

>> x = scanI2CBus(a,1)

x =

2×1 cell array

{'0x48'}

{'0x49'}

>> deviceObj = device(a,'I2CAddress','0x49')

Invalid I2C device address '0x49'. Use scanI2CBus for a list of devices detected on an I2C bus.

>> deviceObj = device(a,'I2CAddress',0x49)

Invalid I2C device address '0x49'. Use scanI2CBus for a list of devices detected on an I2C bus.

I am not able to figure out what I am doing wrong in the deviceObj creation.

I appreciate any suggestion for a solution.

Answer 1

[Mirko Krah]

Hey,

the Due has two I2C Busses.

Can you try this:

deviceObj = device(a,'I2CAddress','0x49','Bus',1);

If you are on Bus "0", try ist with this:

deviceObj = device(a,'I2CAddress','0x49','Bus',1);