What is it?

A neat solution to see if your Pi is connected to WiFi and/or Ethernet and also directly see the hostname of your Pi without connecting a screen.

Why did you make it?

Raspberry Pi's are awesome. I use them for teaching, home automation (blinds, lawn watering, controlling lamps), controlling and remotely monitoring my 3D printers (OctoPi) amongst others.

But I don't have a monitor attached to every one of them. And yet I want to know what the hostname and the local IP addresses of my ethernet and WiFi connections.

What makes it special?

It is not really special very useful instead!

I modified the original OLED module by:

• removing the male pins;
• adding four wires, VCC, GND and i2c (Clock/Data) instead (100mm in length *);
• a pin header (female) to mount to the Raspberry Pi header;
• applying shrink tube around the pins to make them more durable;
• adding double sided 3M tape to protect the circuit and to be able to simply mount the module.

( Other lengths can be discussed.)*

You can obviously do this yourself, but not everyone has the time and some might lack the skills. If that is the case, no worries: I did it for you already!

The OLED module I use: AZDelivery 5 x 0.91" OLED Display I2C SSD1306 Chip 128 x 32 Pixel I2C Screen Display Module with White Characters.

Tested with:

• Raspberry Pi 3b+
• Raspberry Pi 4 (2Gb / 4Gb / 8Gb)
• (Don't hesitate to contact me if you want me to test it for the Pi Zero W)

Software script

The script is arguably the most important. I wrote it in Python as Open Source. You can see it at the GitHub page. It is also very doable for the non pythonistas/pythoneers as I tried to make installing the script as easy as possible. Also, as I actively use the script on multiple pi's myself, I regularly update it when needed.

It will start at bootup and will then refresh the information every so often. See the YouTube video!

Soldering

The first one I made was for the Raspberry Pi 3B+ that controls OctoPi of one of my 3D printers. There I soldered the wires flat on top op the module. I will by default solder the wires through the holes as I show in all other images.