Reading data on Matlab from serial device connected to raspberry pi

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Roger Vegeta 2019-11-27

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https://ww2.mathworks.cn/matlabcentral/answers/493410-reading-data-on-matlab-from-serial-device-connected-to-raspberry-pi

评论： Roger Vegeta 2021-10-7

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Hello everyone!

I will appreciate your help!

I am trying to read data on MatLab from a serial device that is connected to raspberry pi (the serial device is connected to raspberry pi and the pi is connected to a computer). The serial device is a conductivity probe that has a USB output. I tried the code below to read the data from the device, and I got an empty matrix. The conductivity probe sends data by a UART mode (it also has I2C mode, but the UART mode is the default). What should I do in order to get the data?

>> mypi = raspi
mypi = 
  raspi with properties:
         DeviceAddress: '169.254.0.2'                 
                  Port: 18734                         
             BoardName: 'Raspberry Pi 3 Model B+'     
         AvailableLEDs: {'led0'}                      
  AvailableDigitalPins: [4,5,6,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27]
  AvailableSPIChannels: {'CE0','CE1'}                 
     AvailableI2CBuses: {'i2c-1'}                     
      AvailableWebcams: {}                            
           I2CBusSpeed: 100000                        
  Supported peripherals
>> myserialdevice = serialdev(mypi,'/dev/ttyUSB0')
myserialdevice = 
  serialdev with properties:
        Port: '/dev/ttyUSB0'
    BaudRate: 115200
    DataBits: 8
      Parity: 'none'
    StopBits: 1
     Timeout: 10
>> serialData = read(myserialdevice,2)
serialData =
  0×0 empty uint8 matrix

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Hocine YAKOUBI 2021-10-6

编辑：Hocine YAKOUBI 2021-10-6

Hi,

I have the same problem( not realy I connected RX to TX so I use /dev/ttyAMA0), did you resolve it ?

Thanks

Roger Vegeta 2021-10-7

@@Osamah Makki @Hocine YAKOUBI Unfortunally, I was not able to solve this problem. I ended up colllecting data from the serial device directly through a regular computer and Matlab. Best!

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