Install the firmware – ESP32-C3 Super Mini

Connect the device via USB. Use Chrome or Edge. Page served https:// or http://localhost.

If the button is greyed out: make sure you are using a supported browser, the page is served over HTTPS or localhost, the USB cable is not charge-only, and the ESP32-C3 appears as a serial device.

Official project page: MakerWorld – Compagnon 309

Aliexpress links

• ESP32-C3 Super Mini
• OLED display
• Capacitive touch sensor
• Dupont cable
• Vibration motor module

Affiliate links — support the project at no extra cost.

Updates

03/01/25 - Child mode Added - Thanks to ankitag984 for the suggestion
03/01/25 - Vibration mode added
03/01/25 - v0.3 - 3012CM
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27/12/25 - Added time zone (UTC+8) to the simple presets for easier configuration.
27/12/25 - Added India time zone (UTC+5h30) to the simple presets for easier configuration.
27/12/25 - Firmware v0.2 – 271225
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20/12/25 - Firmware v0.2 – 2012EN
20/12/25 - This update provides an almost complete translation of the connection page.
19/12/25 - Internal layout of the Yeti redesigned to maximize usable space.
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17/12/25 - v0.2 - 171225
17/12/25 - Added UTC+3 to the simple presets for easier configuration. Thanks to Ucsus for the suggestion :)
17/12/25 - Added a ‘Dino Jump’–style game to the information panel.
17/12/25 - Time setting and timezone storage in memory bug fixed.
17/12/25 - Offline mode Wi-Fi reconnection bug fixed.
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16/12/25 - Added Thailand time zone (UTC+7, no daylight saving time) to the simple presets for easier configuration. Thanks to KORNect for the suggestion :)
16/12/25 - Added the “firmware version” section
16/12/25 - Added the “Offline mode” section. Thanks to gunner123 for the suggestion