Reading data on Matlab from serial device connected to raspberry pi

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Roger Vegeta
Roger Vegeta am 27 Nov. 2019
Kommentiert: Roger Vegeta am 7 Okt. 2021
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
  5 Kommentare
Hocine YAKOUBI
Hocine YAKOUBI am 6 Okt. 2021
Bearbeitet: Hocine YAKOUBI am 6 Okt. 2021
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
Roger Vegeta am 7 Okt. 2021
@@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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