The kernel module simplifies access to the BMP180 sensor, allowing you to record the temperature and air pressure with shell commands.

Create a web page to generate your own QR codes, use MIT's App Inventor to build an Android QR code reader, and finally, put QR codes on your Pi and Android sensors with links to documentation or real-time web data.

The Rasp Pi Zero comes with minimal equipment. To build it out, you will need an OTG adapter plus a USB hub. Makerspot has an interesting solution for this.

Whenever you're traveling, there's always a chance you could lose your camera, so you should save your pictures as you go. The Pi image bank can save images and even display the pictures via a web server.

You can access and control the Raspberry Pi camera module from your favorite browser using the RPi Cam Web Interface software.

So, you have some new kit for your Arduino – maybe some sensors or ICs – but programming them is clumsy and painful. Don't despair: You can make your life easier by writing your own drivers!