Open Source · ESP32 · Self-Build

Your desk
needs a
buddy.

Robob is a tiny ESP32-powered companion that lives on your desk. It tells you the time, weather, and reminds you to drink water — all on a glowing OLED screen. You build it yourself.

Start Building → GitHub ↗
ESP32 WROOM
~10€
Total Cost
3
Screens
30min
Build Time
0
Soldering Needed
How to build

4 steps to
your Robob

No soldering, no experience needed. Just wires, patience, and a breadboard.

🛒

Get the parts

An ESP32 WROOM dev board and a 0.96" I2C OLED display. That's literally it. Links below.

~10€ total
🔌

Wire it up

Connect SCL → pin 22, SDA → pin 21, VCC → 3.3V, GND → GND. Four wires on a breadboard.

No soldering
⚡

Flash the firmware

Download the latest firmware, open Arduino IDE, plug in USB, flash. Done in under 5 minutes.

Arduino IDE
📱

Setup via app

Open the Robob Android app, connect via Bluetooth, enter your WiFi and OpenWeatherMap key. Robob goes live.

Android app
ComponentPriceStatus
ESP32 WROOM Dev Board38-pin, USB-C or micro-USB
~6€
Required
0.96" I2C OLED Display128×64 px, SSD1306
~3€
Required
Breadboard + Jumper WiresAny size works
~2€
Required
100µF CapacitorBetween GND and 3.3V on screen
<1€
Optional
3D Printed CaseSTL file available for free
Free
Optional
Downloads

Get everything
for free.

All open source, all free, forever. Flash, install, enjoy.

⚡

Firmware

The ESP32 firmware. Handles NTP time sync, OpenWeatherMap weather, OLED rendering and Bluetooth config.

v0.1.0-beta · Arduino C++
Download .ino
📱

Android App

Config app to pair Robob via Bluetooth, send your WiFi credentials, API key and location in one tap.

v0.1.0-beta · Android 8+
Download APK
🖨️

3D Case

Optional printable enclosure for your Robob. Designed for standard FDM printers, no supports needed.

v0.1.0 · STL / 3MF
Download STL
Changelog

What's new

Every update, every fix. Always open.

v0.1.0
Feb 2026

Initial release 🎉

  • NEWClock screen with NTP sync
  • NEWWeather screen via OpenWeatherMap
  • NEWBuddy screen with idle animation
  • NEWBluetooth config via Android app
  • NEWGPS-based location from phone
  • NEW10s screen rotation
v0.2.0
Coming soon

Next up 🔜

  • NEWPomodoro timer screen
  • NEWHydration reminders
  • NEWCustom stopwatch
  • IMPBetter weather icons on OLED
  • IMPSmoother buddy animations
FAQ

Got questions?

The most common ones, answered.

Do I need to know how to code?+
Nope. The firmware is pre-compiled and flashed via Arduino IDE with one click. The app handles all the config. Zero coding required.
Where do I get a free OpenWeatherMap API key?+
Create a free account at openweathermap.org. The free tier gives you 1,000 calls/day, way more than Robob needs (it checks every 10 minutes).
Is iOS supported for the app?+
Not yet — Android only for now. iOS is on the roadmap. If you want to help port it, join the Discord!
My ESP32 doesn't show up in Arduino IDE. What do I do?+
You need to install the CP210x or CH340 USB driver depending on your board. Check the full troubleshooting guide in the Discord #help channel.
Can I customize the screens or add new ones?+
Yes! The firmware is fully open source. Each screen is a separate module. Fork the repo, add your screen, and send a PR — contributions welcome.
Community & Contact

Let's build
together.

Questions, builds, ideas — all welcome.

💬

Discord

The main hub. Ask questions, share your build, get help, suggest features, and hang out with other Robob makers.

Join the server
🐙

GitHub

All source code lives here — firmware, app, and site. Open issues, submit PRs, star the repo if you like it!

View on GitHub
✉️

Contact

Got a specific question, a collab idea, or found a serious bug? Drop a message and we'll get back to you.

Go to contact page

Follow Robob