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

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!!!

Answer 1

[Zuzanna]

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)

[Yasir Iqbal]

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]

Try to update the Support Package Firmware and re-install the Software on Raspberry Pi with the Support Package from Simulink

Answer 2

[reenarosilin raj]

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