# Heltec Wireless Shell V3 > Ultra-compact ESP32-S3 + SX1262 LoRa module with stamp-hole design for direct PCB integration, supporting WiFi, BLE 5, and LoRa at 470-928MHz with deep sleep current under 10uA. ## Quick Facts - **Brand:** Heltec Automation - **Board Type:** module - **Price:** ~$11.9 - **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, vector instructions - **CPU Architecture:** Xtensa LX7 - **CPU Cores:** 2 - **RAM:** 512KB SRAM - **Flash:** 8MB (QSPI) - **USB:** USB Type-C - **Power:** 5V via USB-C or 3.3V direct - **Operating Voltage:** 3.3V - **Operating Temp:** -40°C to +85°C - **Dimensions:** 38.4 × 16.1 × 2.8mm - **Weight:** 3g - **Antenna:** IPEX 1.0 (WiFi/BLE),IPEX 1.0 (LoRa) - **SD Card:** No ## Connectivity - **Wifi:** 802.11 b/g/n - **Bluetooth:** BLE 5.0, Bluetooth Mesh - **Lora:** SX1262 470-510, 863-928MHz ## Certifications CE ## Use Cases - lora-mesh-networking - off-grid-communication - meshtastic-mesh - lorawan-node - embedded-lora-module - pcb-integration - remote-sensor-nodes - smart-agriculture ## Components - **ESP32-S3FN8** (mcu): Xtensa LX7 dual-core processor at 240MHz with 512KB SRAM, 8MB integrated flash, WiFi 802.11 b/g/n and Bluetooth 5 LE. Features hardware crypto acceleration (AES/SHA/RSA), ULP co-processor, and 45 programmable GPIOs. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export) - **SX1262** (radio): Semtech SX1262 long-range, low-power sub-GHz RF transceiver supporting LoRa and FSK modulation in the 150-960MHz band. Features +22dBm TX power, -139dBm RX sensitivity, and 4.2mA active receive current. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F6%2Fb%2F5%2F1%2F4%2FSX1262_datasheet.pdf&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export) ## Protocols - **SPI** (SPI0 (LoRa)): SS: GPIO8, SCK: GPIO9, MOSI: GPIO10, MISO: GPIO11 - **I2C** (I2C0): SDA: GPIO41, SCL: GPIO42 - **UART** (UART0): TX: GPIO43, RX: GPIO44 - **PWM** - **ADC** ## GPIO Map | Pin | Name | Type | Functions | |-----|------|------|-----------| | GPIO1 | General Purpose I/O | — | digital-input, digital-output, adc, touch, pwm, rtc | | GPIO2 | General Purpose I/O | — | digital-input, digital-output, adc, touch, pwm, rtc | | GPIO4 | General Purpose I/O | — | digital-input, digital-output, adc, touch, pwm, rtc | | GPIO5 | General Purpose I/O | — | digital-input, digital-output, adc, touch, pwm, rtc | | GPIO6 | General Purpose I/O | — | digital-input, digital-output, adc, touch, pwm, rtc | | GPIO7 | General Purpose I/O | — | digital-input, digital-output, adc, touch, pwm, rtc | | GPIO8 | SPI SS (LoRa SX1262) | SPI | digital-input, digital-output, pwm | | GPIO9 | SPI SCK (LoRa SX1262) | SPI | digital-input, digital-output, pwm | | GPIO10 | SPI MOSI (LoRa SX1262) | SPI | digital-input, digital-output, pwm | | GPIO11 | SPI MISO (LoRa SX1262) | SPI | digital-input, digital-output, pwm | | GPIO12 | LoRa RST | — | digital-input, digital-output, pwm | | GPIO13 | LoRa BUSY | — | digital-input, digital-output, pwm | | GPIO14 | LoRa DIO1 (IRQ) | — | digital-input, digital-output, pwm | | GPIO19 | General Purpose I/O | — | digital-input, digital-output, adc, pwm | | GPIO20 | General Purpose I/O | — | digital-input, digital-output, adc, pwm | | GPIO41 | I2C SDA | I2C | digital-input, digital-output, pwm | | GPIO42 | I2C SCL | I2C | digital-input, digital-output, pwm | | GPIO43 | UART TX / USB Serial | UART | digital-input, digital-output, pwm | | GPIO44 | UART RX / USB Serial | UART | digital-input, digital-output, pwm | | GPIO47 | General Purpose I/O | — | digital-input, digital-output, pwm | | GPIO48 | LED / General Purpose I/O | — | digital-input, digital-output, pwm | ## Description ## Overview The Heltec Wireless Shell V3 (HTIT-Wsh_V3) is an ultra-compact LoRa node module measuring just 38.4 x 16.1 x 2.8mm, built around the ESP32-S3FN8 MCU and Semtech SX1262 LoRa transceiver. Its 1.27mm stamp-hole design allows it to be soldered directly onto a carrier PCB, making it ideal for custom product development and embedded IoT applications where space is at a premium. The module integrates WiFi 802.11 b/g/n, Bluetooth 5 (LE + Mesh), and LoRa connectivity with dual IPEX 1.0 antenna connectors for independent WiFi/BLE and LoRa antennas. It achieves an impressive deep sleep current of under 10uA, a significant improvement over the V2's 30uA, making it well-suited for battery-powered deployments in remote sensing and mesh networking applications. The Wireless Shell V3 includes RF shielding, ESD protection, and short-circuit protection out of the box. It runs the same ESP32-S3 + SX1262 core as Heltec's popular WiFi LoRa 32 V3, giving it full compatibility with the Arduino ecosystem, Heltec's ESP32 libraries, and community firmware projects like Meshtastic and MeshCore for off-grid mesh communication. With a temperature-compensated crystal oscillator (TCXO) for improved frequency stability and support for LoRaWAN protocol, the module serves applications ranging from smart agriculture and environmental monitoring to industrial IoT sensor networks and urban mesh communication infrastructure. ## Where to Buy - [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwireless-shell-v3%2F&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export) — 11.90 - [AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2F1005005214621307.html&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export) — 11.90 ## Resources - [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwireless-shell-v3%2F&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export) - [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltec_ESP32&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export) - [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.heltec.org%2Fen%2Fnode%2Fesp32%2Fwireless_shell%2Findex.html&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export) - [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Shell_V3%2FHTIT-Wsh_V3%28Rev1.1%29.pdf&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export) - [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Shell_V3%2FHTIT-Wsh_V3_Schematic_Diagram.pdf&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export) ## Tags `esp32-s3`, `lora`, `sx1262`, `meshtastic`, `lorawan`, `ble`, `wifi`, `mesh`, `iot-module`, `stamp-hole` ## Images ![Heltec Wireless Shell V3](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wireless-shell-v3/4d377737e6fb.png) ![Heltec Wireless Shell V3](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wireless-shell-v3/14a75b60d9d7.png) ![Heltec Wireless Shell V3](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wireless-shell-v3/0de124920ec7.png) --- [View full device page](https://openhardware.directory/devices/heltec-wireless-shell-v3)