In fact, someone already made a Pomodoro timer using a Raspberry Pi, and it came with an air quality sensor. You too can make this cool e-ink Pomodoro timer with an ESP32.

TRMNL is a 7-5-inch wireless E-Ink display based on an ESP32-C3 RISC-V WiFi and Bluetooth SoC and designed to be customizable ...

The ESPHome 2025.6.0 open-source firmware was released on June 18, 2025, with ESP32-P4 support and an initial OpenThread ...

The device comes powered by an ESP32-S3 processor and supports Wi-Fi 4 and Bluetooth 4.2. The larger E Ink panel serves as the primary display and is not backlit, which means it depends on the ...

But this model is powered by a modern, low-power ESP32-S3 processor (with two low-power Xtensa LX7 32-bit microprocessors running at 240 MHz and support for WiFi 4 and Bluetooth 4.2 LE. And it has ...

While some details haven’t been finalized yet, the basic elements include an ESP32-S3 system-on-a-chip combined with a small E Ink display and a custom printed circuit board with a QWERTY keyboard.

The CL-32, his latest creation, features an E Ink display powered by an ESP32-S3 SoC. Further, the device also offers GPIO ports should you wish to add some other peripherals.