why i have this error when i try to start my connection with raspberry pi?

Question

squall141 2014-11-21

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/163779-why-i-have-this-error-when-i-try-to-start-my-connection-with-raspberry-pi

回答： Kazem Gheysari 2023-8-5

采纳的回答： Murat Belge

在 MATLAB Online 中打开

Hello guys, i have installed the Raspberry pi package support for matlab but when i give the command:

mypi = raspi

i obtain this error:

Error using raspi (line 160)
Cannot establish an SSH connection to the board with device address "192.168.1.2".
Caused by:
    Error using raspi (line 156)
    Error executing command: FATAL ERROR: Network error: Connection refused

During the installation of the package i have set a static ip for the raspberry in this way:

IPv4 Address. . . . . . . . . . . : 192.168.1.2
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1

And, if is important for the resolution of my problem, i have connected the raspberry pi to my pc with a ethernet cable, and the pc is connects to internet with a usb key wireless. The router is not phisically connected to the pc.

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Answer 1

Murat Belge 2014-12-10

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https://ww2.mathworks.cn/matlabcentral/answers/163779-why-i-have-this-error-when-i-try-to-start-my-connection-with-raspberry-pi#answer_161975

There is no SSH server running on 192.168.1.2 and the target machine is refusing SSH connection request from MATLAB.

1. Login to your Raspberry Pi using a monitor and keyboard and check that the board has the correct IP address. After logging in to Raspberrry Pi, execute the following in a Linux shell window

$ ifconfig eth0

Verify that the "inet addr" displayed as a result of the command above is "192.168.1.2". If not, you need to modify your /etc/network/interfaces file to assign a static IP address.

2. SSH server is running:

$ps -ef | grep sshd

This should return an sshd server running on your Raspberry Pi if you do not see anything reboot your Raspberry Pi

3. Ping your Raspberry Pi from within MATLAB:

>> ! ping 192.168.1.2

This should be successful.

Report what you are getting.

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charushila raskar 2017-12-29

编辑：Walter Roberson 2017-12-29

在 MATLAB Online 中打开

Pinging 192.168.1.100 with 32 bytes of data: 
Reply from 192.168.1.100: bytes=32 time=1ms TTL=64 
Reply from 192.168.1.100: bytes=32 time=2ms TTL=64 
Reply from 192.168.1.100: bytes=32 time=2ms TTL=64 
Reply from 192.168.1.100: bytes=32 time=1ms TTL=64