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Clock/0

A 2.66-inch e-paper clock without a backlight, with a display that changes at sunrise and sunset and a replaceable CR2032 battery.

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What is Clock/0?

Clock/0 is a lightweight e-paper clock. Its 2.66-inch black-and-white display has no backlight, and the content changes automatically at sunrise and sunset.

An included CR2032 battery powers the clock. The SET and BACK buttons on the rear let you set the date and time and refresh the screen. The magnetic rear cover lets you attach it to surfaces that attract magnets.

Getting Started

Install the battery, set the date and time, and learn the buttons and screen refresh

DIY Your System

Write and flash firmware to try your own displays and interactions

Clock/0 technical specifications

ItemSpecification
Display2.66-inch black-and-white e-paper, no backlight
MCUCW32L010, ARM® Cortex®-M0+ core, up to 48 MHz
Internal memoryUp to 64 KB Flash and 4 KB SRAM
Low-speed external clock32.768 kHz LSE configured at the factory
ButtonsSET and BACK, with short and long presses
PowerIncluded replaceable CR2032 lithium battery, non-rechargeable
Rated voltage3 V
Timekeeping errorLess than 10 minutes per calendar year
Development interfaceSWD; pads labeled GND × 2, CLK, DIO, and 3V
Model numberCL0-G01
Net weight26 g

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Third-Party System Installation Issues

Resolve SD card, serial connection, flashing failure, and post-installation responsiveness issues on Read Pico.

Getting Started

Install the CR2032 battery, use SET and BACK to set the date and time, and clear screen ghosting on Clock/0.

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What is Clock/0?Clock/0 technical specifications