Note: This is the Heltec Vision Master E290 (US Band 902-928 MHz) with Meshtastic firmware pre-installed. Perfect for Meshtastic mesh networking nodes with its large E-Ink display. The Vision Master E290 is a low-power ESP32-S3 based E-Ink LoRa development board designed for long-range wireless applications. Featuring a 2.90-inch black & white E-Ink display, it offers excellent readability even in direct sunlight and can retain the last image for up to 180 days after power loss. This configuration comes with the US frequency band (902-928 MHz) and Meshtastic firmware pre-loaded — ready for immediate use in Meshtastic mesh networks. Ideal for off-grid communication, electronic shelf labels, asset tracking, environmental monitoring, and other low-power IoT projects. KEY FEATURES 2.90-inch E-Ink Display: 296 × 128 pixels, black & white with partial refresh support — ultra-low power and sunlight-readable. ESP32-S3R8 MCU: Powerful dual-core processor with Wi-Fi and Bluetooth 5 support. LoRa Connectivity: SX1262 LoRa transceiver (US 902-928 MHz band) with up to 21 dBm TX power and excellent sensitivity. Pre-flashed with Meshtastic Firmware: Ready for Meshtastic mesh networking right out of the box. Ultra-Low Power: Only 18 µA in deep sleep — ideal for battery-powered or solar deployments. Battery Management: Onboard lithium battery charging circuit with USB-C, overcharge protection, and automatic power switching. Expansion Options: SH2.0-4P sensor interface (compatible with QuickLink sensors), 2×20 pin header (Raspberry Pi compatible), and IPEX antenna connectors. Compact & Lightweight: Small form factor perfect for portable or embedded projects. SPECIFICATIONS Product Name Vision Master E290 (US Band + Meshtastic) MCU ESP32-S3R8 (Dual-core, Wi-Fi + BLE 5) LoRa Chip SX1262 LoRa Frequency US Band: 902–928 MHz Max TX Power 21 ±1 dBm E-Ink Display 2.90 inch, 296 × 128 pixels, Black & White (2 grayscale), partial refresh Memory 16 MB Flash, 8 MB PSRAM, 512 KB SRAM Wireless Wi-Fi 802.11 b/g/n, Bluetooth 5 (LE) Interfaces USB-C, SH1.25-2P battery connector, IPEX for LoRa & Wi-Fi antennas, SH2.0-4P sensor port, 2×20 pin header Battery Support 3.7V Li-Ion / Li-Po (battery not included) Power Consumption 18 µA in deep sleep Dimensions 87.96 × 36.63 × 12 mm Weight 35 g Compatibility Meshtastic, LoRaWAN, Arduino, PlatformIO, MicroPython WHAT'S INCLUDED 1 × Vision Master E290 board (US band, Meshtastic pre-flashed) 1 × LoRa Antenna (IPEX) 1 × SH1.25-2P battery connector 2 × 2.54 mm header pins (13-pin) NOTES Battery is not included — you can connect your own 3.7V Li-Ion or Li-Po battery. Antenna is included for LoRa; Wi-Fi uses the onboard spring antenna. Excellent for building long-lasting Meshtastic nodes with persistent display. Not waterproof — suitable for indoor or protected outdoor use.
