Click

Carry a one-button clicker with games and a breathing timer, and write your own applets.

ESP32OLEDWeb flasherOpen hardwareFidget

Availability: In development
Design: Open

Compare with similar devices

Radio equipment needs certification where you live (FCC, CE, UKCA, ISED, Anatel). Some devices are uncertified or restricted in Brazil. Buyers are responsible for their local law.

Bring along: A board from the maker or your own build from the open files; Chrome or Edge to flash.
Keep in mind: Not on sale yet; the production board changes the microcontroller.

Source checked · Sep 17, 2026

Click — Image credit
Maker product image, background removed · Product71

(02) Blueprint

Build it yourself

Open hardware

Full KiCad schematic/PCB, STEP 3D models, and (for the in-production Click 4 board) Gerbers/BOM/pick-and-place CSVs are public on GitHub for both the ESP32 prototype and RP2354A production revisions; enclosure is SolidWorks + exported STL.

Click 1 KiCad project (ESP32-WROOM-32E prototype)

Read straight from the maker’s repository. Open on GitHub

Click 1 KiCad project (ESP32-WROOM-32E prototype)

GitHub

Design files 8

Source 1

prajjwalprajjwal/Clickhardware15

git clone https://github.com/prajjwalprajjwal/Click.git

Key parts 3

Espressif ESP32-WROOM-32E All ESP32 devicesMCU (Click 1, active prototype)Datasheet
Raspberry Pi RP2354AMCU (Click 4, production PCBA)Datasheet
Solomon Systech SSD1306128x64 OLED driverDatasheet

Research notes

Verified via `gh api repos/prajjwalprajjwal/Click/git/trees/HEAD?recursive=1` (full hardware/ tree) and docs/hardware_and_pinouts.md content, cross-checked against the Tindie-style project site. Click 1 (ESP32-WROOM-32E) is the currently-active hand-assembled prototype; Click 4 (RP2354A) is the queued JLCPCB production revision -- both PCB folders and chips are real and present. Repo license is a custom CC-BY-NC-SA 4.0 + CERN-OHL-NC-2.0 non-commercial license (personal/educational builds permitted, commercial manufacture reserved to the author) -- affects reuse rights, not the openness classification. ETA6003 battery-charger IC is also on both boards but no manufacturer-hosted datasheet could be verified, so it is left out of parts.

Every link checked 2026-09-27.

Hand this device to your agent. Everything on this page, as clean Markdown and JSON: specs, shops, prices, design files, parts.

Markdown JSON

Made the Click? Put the badge on your README; it links here, with every shop that sells it.

Specifications

Hardware (Click 1 prototype)

Microcontroller: ESP32-WROOM-32E, dual-core 240 MHz, 4 MB flash
Display: 128 × 64 SSD1306 monochrome OLED over 400 kHz I²C
Buttons: MODE and ACTION, both able to wake the device from deep sleep
Battery: Li-ion with an ETA6003 switching charger; voltage sensed through a 100 kΩ divider
USB: USB-C with a CH340C USB-to-serial bridge
Sleep: Light sleep after 20 s idle, deep sleep after 45 s

Planned Click 4 production board

Microcontroller: RP2354A with native USB
Additions: Buzzer, APA102 LEDs, PCF8563 real-time clock, slide power switch
Manufacturing: Designed for JLCPCB assembly; production files are in the repository

Firmware

Applets: Sisyphus click counter, Just Ten breathing timer, Flappy Bird, settings screen, snowfall screensaver
Flashing: Browser web flasher over Web Serial; updates keep saved scores
Leaderboard: Community totals synced over USB, with devices identified by their chip MAC
Extending: Applets are C++ classes registered in main.cpp; the core OS stays untouched

Files and licence

Open files: KiCad schematics and PCBs for Click 1 and Click 4, enclosure STLs and SolidWorks files
Licence: CC BY-NC-SA 4.0 and CERN-OHL-NC-2.0 principles (non-commercial)

What still needs checking

No price, shop or delivery date exists yet; the site links only to GitHub and the flasher.
Battery capacity, dimensions and weight are not stated.
The 1.5 mA standby figure is the maker’s claim and was not measured.
Firmware for the Click 4 board is described as an adaptation still to come.

Downloads & docs

Maker websiteclick.uprajjwal.com.np Project repositorygithub.com README at the reviewed commitgithub.com Hardware and pinout notesgithub.com Web flasher and leaderboardflashclick.uprajjwal.com.np Licencegithub.com

Source & revision notes

Maker listing checked Sep 17, 2026. Detailed documentation reviewed Sep 17, 2026. Not hands-on tested.

Specifications come from the maker’s hardware notes at commit 11b624a (2026-09-17). The site has no shop; the README says prototype boards were hand-built and a Click 4 production run is being prepared, so availability is shown as in development.

The ESP32 has Wi-Fi and Bluetooth, but the maker states the firmware runs no network activity. The leaderboard syncs over USB through the web flasher.

Licence is CC BY-NC-SA 4.0 for the project and CERN-OHL-NC-2.0 principles for hardware: non-commercial reuse only.

Capability corrected 2026-09-19: this entry carried a 5 GHz Wi-Fi flag that its own recorded specifications do not support. Removed rather than guessed; if the maker documents 5 GHz, add it back with the source.

Reviewed at commit 11b624aa37594bb2fedf7bc4e461e1e6457f089f. The hero photo shows hand-built prototypes and enclosure iterations, not a finished retail unit.

Build or list hardware with us