Vision Master E290 (HT-VME290) is an E-Ink development kit with multiple wireless drive methods. Collaborate with the sample programs and development tools we provide, users can operate the display via Bluetooth, Wi-Fi and LoRa. This board is equipped with a default 2.90-inch black-white E-Ink display screen, continuous display for 180 days after power outage. It is compatible with Arduino, PlatformIO, Micpython and other development frameworks, can be used to develop applications such as electronic tags and identity tags, it is also possible to run open source projects like Meshtastic. Main Features ESP32-S3R8 MCU, support Wi-Fi and BLE. LoRa module is optional, compatible with Mashtastic. Low power consumption, 18uA in deep sleep, continuous display for 180 days after power outage. Onboard SH1.25-2 battery interface, integrated lithium battery management system (charge and discharge management, overcharge protection, battery power detection, USB / battery power automatic switching). Onboard 2.90 inch 296 x 128 pixels display, support for partial refresh. Storage condition: -25 ~ 70℃, ≤45%RH. Optimal operating condition：0~50℃, 55±10%RH. SH2.0-4P sensor interface is perfectly compatible with QuickLink series sensors. 2*20 Pin Female Header, perfectly compatible with Raspberry PI. Compatible with Arduino, we provide development frameworks and libraries. Specifications Parameters Description Master Chip ESP32-S3R8 LoRa Node Chip SX1262 Frequency 470~510MHz,863~928MHz Max. TX Power 21±1dBm Max. Receiving sensitivity -136dBm@SF12 BW=125KHz Wi-Fi 802.11 b/g/n, up to 150Mbps Bluetooth Bluetooth 5 (LE) Hardware Resource 6*ADC_1, 1*ADC_2, 6*Touch, 8M*PSRAM, 3*UART; 2*I2C; 2*SPI. Etc Memory 384KB ROM;512KB SRAM;16KB RTC SRAM;16MB SiP Flash Interface Type-C USB;2*1.25 lithium battery interface;LoRa ANT(IPEX1.0);Wi-Fi ANT(IPEX1.0);2*20 Pin Famle Header;SH2.0-4P sensor interface. Battery 3.7V lithium battery power supply and charging Operating Temperature -20 ~ 70 ℃ E-Ink 2.90 Inch, 128(H)x296(V) Pixel, 29x67mm, Display Color Black&White(2 Grayscale) Dimensions 87.96*36.63*12mm Display 2.90 Inch Black and White E-Ink Display Screen Pin Map Dev board return policy Development boards are specialty items that generally cannot be resold on return, especially if the firmware has been flashed. Defective boards can be replaced or returned for refund within 30 days of purchase. Non-defective boards can be returned in the same time frame if in like-new condition with a 20 percent restocking fee applied. If the board has had altered firmware or became bricked due to a non-standard firmware flash, the board may not be eligible for return. Sales tax is required in many states and will be added at checkout if applicable to your delivery state. Tax exempt forms can be sent to our support department.
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