HELTEC Vision Master T190 (HT‑VMT190) is a versatile development kit powered by the ESP32‑S3 with an optional LoRa module . It features a 1.9‑inch TFT‑LCD display with a resolution of 170 (RGB) × 320 pixels, capable of rendering up to 262k colors for crisp and vibrant visuals. With the included sample programs and development tools , users can easily control the display via Bluetooth , Wi‑Fi , or LoRa . The kit is perfect for entry‑level programming and fully supports open‑source projects like Meshtastic , making it an excellent choice for both learning and prototyping . Features High-Performance MCU: ESP32-S3R8 with Wi-Fi + Bluetooth Low Energy (BLE) Optional LoRa Module: Compatible with Meshtastic for long-range communication Ultra-Low Power: Only 18 μA in deep sleep mode Smart Power Management: Onboard SH1.25-2 battery interface Integrated lithium battery management system (charge/discharge, overcharge protection, power detection) Automatic USB/battery switching for seamless use Display & Interface 1.9-inch TFT-LCD screen with 170 (RGB) × 320 resolution, up to 262K colors SH2.0-4P sensor interface, compatible with QuickLink series sensors Environmental Conditions Storage: -30℃ ~ 70℃, ≤45% RH Optimal Operation: -20℃ ~ 60℃, 55±10% RH Development & Compatibility Arduino-compatible with ready-to-use frameworks & libraries for rapid prototyping 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 LE: Bluetooth 5, Bluetooth mesh Hardware Resource 7*ADC_1, 6*ADC_2, 11*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*12*2.54 Header Pin;SH1.0-4P sensor interface. Battery 3.3~4.2V lithium battery power supply and charge. Operating Temperature -20 ~ 70 ℃ Dimensions 60*25.4*10.19mm Display Onboard 1.9 Inch TFT-LCD Display Description Pin Map Dimension High light LoRa module is optional LoRa modules are optional and can reduce a lot of costs if you don’t need a LoRa module. Highly extensible Vision Master T190 has a rich set of pins and hardware resources, which will allow you to expand widely. The SH1.0-4P interface can be directly connected to the QuickLink series sensors. Plastic support plate A transparent plastic support platform is installed between the PCB and the display frequency, which can protect the electronic components on the board and enhance the heat dissipation function of the board. LoRa module is optional LoRa modules are optional and can reduce a lot of costs if you don’t need a LoRa module. Highly extensible Vision Master T190 has a rich set of pins and hardware resources, which will allow you to expand widely. The SH1.0-4P interface can be directly connected to the QuickLink series sensors. Docs & Resource [Docs] — User Manual [Resource] — Heltec ESP (ESP32&ESP8266) framework [Resource] — NM Miner Project [Attachment] — Heltec ESP32 library [Attachment] — NM Miner Project [Attachment] — Datasheet [Attachment] — E-Ink Datasheet [Resource] — Related Resources Packing list The default packing list without selecting any accessories is as follows: Item Quantity HT-VMT190 x1 LoRa Antenna x1 SH1.25-2P Battery Connector x1 Sensor connection wire x1 2.54 *13 Header Pin x2
