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[pi] Headless pi connection with VNC on Mac system

Sometimes we have to access our pi with limited resources like lacking of monitor or keyboard. The Headless mode is useful to connect to your pi with another computer or your laptop without additional screen!
Now let’s get started to give it a try!

Setting Raspberry pi board

Connection to pi
connect to raspberry pi board with 

ssh pi@rapberrypi.local

and input your password(Default password has been setted to raspberry)

Configue the VNC
Input

sudo raspi-config

Navigate to Advance Option
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Select [P3 VNC] and click [OK]
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After setting up of the VNC, reboot the pi

sudo reboot

On Mac

Downlaod VNC viewer from:
https://www.realvnc.com/en/download/viewer/

enter image description here

After installed the VNC viewer, Input the IP address of raspberry pi and click Continue.
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Now we have successfully connect to our pi with VNC!
enter image description here

Improve the resolution

We have justed connected to the pi with VNC. However, the screen is quite small and the resolution wasn’t really good. How can we improve it?

Let SSH to our pi gain with

ssh pi@192.168.1.110

(192.168.1.110 is my pi’s address)
Now we need to modify the config.txt setting for better VNC viewer resolutions.

sudo nano /boot/config.txt

uncomment and change the HDMI settings

hdmi_group=5
hdmi_mode=85
hdmi_ignore_edid=0xa5000080

hdmi_mode=85 represents the resolution of HDMI mode will be setted into 1280x720.
enter image description here
after the parameter setting, click [Ctrl+X] and click [Y] and [Enter] to modify the config.txt file.

After all the setting processs, we can now reboot the machine.

sudo reboot

Connect again with VNC Viewer

If everything goes well. The resolution of HDMI mode will be setted to 1280x720 like the screen shot showing below :-D
enter image description here

Happy piING~

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