Rapberry Pi connection problem; Error raspi; Cannot establish a TCP/IP connection

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Zuzanna
Zuzanna 2015-11-11
回答： reenarosilin raj 2017-2-20
I'm working on Matlab 2015a with support package for raspberry pi; Windows 7; Raspberry Pi 2 B
Rasbian Wheezy is downloaded from www.raspberrypi.org. Simulink (blinking led example) is working; Simulink (camera example) not; Writing programs in command window - not. The worst is that raspi is not working.
mypi=raspi('192.168.0.12','pi','raspberry')
Error using raspi (line 169)
Cannot establish a TCP/IP connection to the board with device address "192.168.0.12".
Caused by:
Error using raspi (line 165)
Cannot create a communication link with the remote server. Please
check the input arguments(ADDRESS and PORT) and make sure the server
is running.
Additional Information: Unable to connect, because
     the target machine actively refused it.
Everything is connected properly, IP address checked in n-map; ping is working, putty working.
I tried downloading Raspian Wheezy also from Matlab. Than N-map cannot find raspberry in my network at all; test connection fails; tried SD card setup 3 times - all failes. Ack LED blinks around 5sec than stops, the other is solid red all the time.
Warning: Could not detect the Raspberry Pi hardware in allotted time.
Try using "Test Connection" button.
> In raspi.setup.RaspberryPiFirmwareUpdate/configureNetwork (line 404)
In raspi.setup.internal.executeRaspberryPiConnectHardware (line 38)
In hwconnectinstaller.Step/next (line 169)
and
>> mypi=rspi
Error using raspi (line 157)
Cannot establish an SSH connection to the board with device address
"raspberrypi-zuza".
Caused by:
Error using raspi (line 153)
Error executing command: Unable to open connection:
Host does not exist
Help!!!

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回答（2 个）

Zuzanna
Zuzanna 2015-11-15
Ok, I know the answer..
Raspberry Pi 2 B requires 1,2A power supply.
(https://www.raspberrypi.org/documentation/hardware/raspberrypi/power/README.md)
If you connect your Raspberry to your USB 2.0 than some parts are working, the other not...
Max. current:
  • 0.5 A (USB 2.0)
  • 0.9 A (USB 3.0 & 3.1)
  • 1.5 A (USB BC 1.2)
  • 3 A (USB Type-C)
  • Up to 5 A (USB-PD)
(https://en.wikipedia.org/wiki/USB)
  2 个评论
Yasir Iqbal
Yasir Iqbal 2016-1-8
I am also having a same problem,I have tried three power supply with different rating but still 'Ack' led is not blinking and connection failed..Any solution now ?
wasted
wasted 2016-7-29
Try to update the Support Package Firmware and re-install the Software on Raspberry Pi with the Support Package from Simulink

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reenarosilin raj
reenarosilin raj 2017-2-20
I am working with Matlab 2014a with raspberry pi 3B Matlab support package i am getting an error can u help me pls
Warning: Could not detect the Raspberry Pi hardware in allotted time. Try using "Test Connection" button. > In C:\MATLAB\SupportPackages\R2014a\raspi\+raspi\+setup\RaspberryPiFirmwareUpdate.p>RaspberryPiFirmwareUpdate.configureNetwork at 395 In C:\MATLAB\SupportPackages\R2014a\raspi\+raspi\+setup\+internal\executeRaspberryPiConnectHardware.p>executeRaspberryPiConnectHardware at 39 In C:\Program Files\MATLAB\R2014a\toolbox\shared\hwconnectinstaller\+hwconnectinstaller\Step.p>Step.next at 169

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