Adafruit MagTag
The Adafruit MagTag is an ESP32-S2 WiFi e-paper IoT display board featuring a 2.9" 296×128 grayscale e-ink screen, 4 NeoPixels, LIS3DH accelerometer, 4 user buttons, STEMMA QT, USB-C, LiPo charging, and a deep-sleep current of ~250µA — ideal for low-power battery-driven IoT displays.
$34.95
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Specifications
Certifications
Components
Solomon Systech SSD1680 e-paper display controller for 2.9" grayscale 296×128 panel
ST Microelectronics LIS3DH 3-axis MEMS accelerometer for orientation and wake-from-sleep
Bus Interfaces
GPIO Map
Overview
The Adafruit MagTag is a low-power WiFi e-paper display platform built around the ESP32-S2 single-core Xtensa LX7 processor at 240MHz. The 2.9" grayscale e-ink display (296×128 pixels, SSD1680 driver) consumes power only during updates — combined with the ESP32-S2's deep sleep mode drawing just 250µA (with NeoPixels and amplifier disabled), the MagTag can run for weeks or months on a single LiPo charge, making it ideal for IoT dashboards, price tags, status boards, and low-power displays.
The board includes four side-emitting RGB NeoPixels for status indication, a LIS3DH triple-axis accelerometer, a front-facing light sensor, a mono speaker with class D amplifier, one STEMMA QT I2C port, and two 3-pin STEMMA JST connectors for NeoPixels, servos, or relays. Four user buttons double as wake-from-sleep triggers, enabling power-efficient event-driven workflows.
Power is via USB-C with integrated LiPo charging (350–420mAh batteries supported), and an on/off switch enables complete power cutoff for transport. The 4MB flash and 2MB PSRAM provide ample space for CircuitPython libraries and web API data. The MagTag was originally the centerpiece of AdaBox 016 and comes with a starter kit including an acrylic enclosure and magnetic feet.
Use Cases
5IoT Display
Boards with integrated displays for IoT dashboards, status screens, and connected information panels.
E-Reader
Electronic book reader and document viewer with low-power e-paper display for comfortable long-form reading.
Smart Home
Home automation devices for controlling lighting, climate, security, and appliances.
Environmental Monitoring
Monitoring environmental conditions like temperature, humidity, air quality, and weather data using remote sensors.
Weather Display
A dedicated screen that shows weather information including current conditions, temperature, humidity, pressure, and multi-day forecasts.
Where to Buy
Explore more of the directory — popular use cases, firmware, and specs to browse next.
