SSH and VNC from Windows and Android phone

Enable SSH by placing file ssh in /boot

Enable VNC with Pixel – Preferences – Raspberry pi Configuration – Interfaces or sudo raspi-config Interfacing options

Playstore Real VNC Viewer


Clear system

dpkg-query -W --showformat='${Installed-Size;10}\t${Package}\n' | sort -k1,1n
Others I found on the way:
dpkg-query --show --showformat='${Package;-50}\t${Installed-Size}\n' | sort -k 2 -n
dpkg-query --show --showformat='${Package;-50}\t${Installed-Size} ${Status}\n' | sort -k 2 -n |grep -v deinstall

Arduino Things

I just bought a Pimoroni RainbowHAT and am now waiting for it to arrive from the UK!

Here I found an excellent first getting acquainted with this platform:

Installing the Arduino 1.6.12 IDE on Raspberry Pi, with ESP8266 and RaspiDuino

Installing the Arduino 1.6.12 IDE on Raspberry Pi

1. Go to and download the Arduino IDE 1.6.12 for the ARM processor.
2. Open a terminal window.
3. Type cd ~/Downloads
4. Type tar -xvf arduino -1.6.12-*.tar.xz
5. Type sudo mv arduino-1.6.12 /opt
6. Type cd /opt/arduino-1.6.12/
7. Type chmod +x
8. Type ./

The new Arduino IDE will be in the drop down, along with your old Arduino IDE (probably 1.0.5 – which is installed when you type sudo apt-get arduino in a terminal window from the Raspberry). You will notice the difference immediately in the splash screen startup and the window pane header will read, “Arduino 1.6.12”.

ESP8622 with WiFi . If you are wanting to do this, navigate to File → Preferences and look near the bottom of the window that pops open for “Additional Boards Manager URL:”.

Type the following in the blank field: … index.json

and click OK.

Now, go to Tools → Board “<your last chosen board>” and click on “Boards Manager” at the top of the list.

Type “ESP8266” in the Filter Your Search box at the top of the window.

Esp8266 by ESP8266 Community will show up. Highlight it and click Install in the lower right corner.