Newt – a low-power, open source, 2.7-inch IoT display #OpenSource #CircuitPython #IoT @CrowdSupply

Newt is a battery-powered, always-on, wall-mountable display that can go online to retrieve weather, calendars, sports scores, to-do lists, quotes…really anything on the Internet! It is powered by an ESP32-S2 microcontroller that you can program with Arduino, CircuitPython, or ESP-IDF.

We consider Newt to be the next step in the evolution of low-power display boards. Perfect for makers, SHARP’s Memory-in-Pixel (MiP) technology avoids the slow refresh times associated with E Ink displays. To support timers and alarms, we’ve also added a real-time clock (RTC). And finally, we’ve designed Newt with battery operation in mind – every component on the board was chosen for it’s ability to operate at low power.

Newt was designed to operate “untethered,” which means you can mount it in places where a power cord would be inconvenient – like on a wall, refrigerator, mirror, or dry-erase board. With the optional stand, Desks, shelves, and nightstands are also good options.

Features & Specifications


  • Espressif ESP32-S2-WROVER Module with 4 MB flash and 2 MB PSRAM
  • Wi-Fi capable
  • Supports Arduino, CircuitPython, and ESP-IDF
  • Deep sleep current as low as 25 uA


  • 2.7-inch, 240 x 400 pixel MiP LCD
  • Capable of delivering high-contrast, high-resolution, low-latency content with ultra-low power consumption
  • Reflective mode leverages ambient light to eliminate the need for a backlight

Time keeping, timers, and alarms:

  • Micro Crystal RV-3028-C7 RTC
  • Optimized for extreme low-power consumption (45 nA)
  • Able to simultaneously manage a periodic timer, a countdown timer, and an alarm
  • Hardware interrupt for timers and alarms
  • 43 bytes of non-volatile user memory, 2 bytes of user RAM
  • Separate UNIX time counter


  • Speaker/buzzer with mini class-D amplifier on DAC output A0 can play tones or lo-fi audio clips

User Interaction:

  • 10 capacitive touch pads
  • Power switch
  • Two programmable tactile buttons for Reset and Boot


Newt is designed to operate for one to two months between charges using a 500 mAH LiPo battery. The exact run time varies. (Heavy Wi-Fi use, in particular, will reduce battery charge more quickly.)

  • USB Type-C connector for programming, power, and charging
  • Low-quiescence voltage regulator (TOREX XC6220) that can output 1 A of current and operate as low as 8 uA.
  • JST connector for a Lithium-Ion battery
  • Battery-charging circuity (MCP73831)
  • Low-battery indicator (1 uA quiescence current)


  • 91 x 61 x 9 mm


  • Newt hardware is compatible with open-source Arduino libraries for ESP32-S2, Adafruit GFX (fonts), Adafruit Sharp Memory Display (display writing), and RTC RV-3028-C7 (RTC)
  • Arduino libraries and sample programs are under development and will be available in our GitHub repository before launch
  • CircuitPython libraries and registration are on the roadmap, with the development of a CircuitPython library for the RV-3028 real-time clock as a key dependency

See more on CrowdSupply

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