Heltec Wireless Stick V4 (ESP32-S3 + LoRa)

The Heltec Wireless Stick V4 is a next-generation compact LoRa development board, designed as a direct upgrade to the popular V3 while retaining the same form factor and pin compatibility. Built around the ESP32-S3R2 dual-core MCU and SX1262 LoRa transceiver, it delivers significantly improved RF performance, system stability, and power efficiency. A protected onboard OLED display, integrated 2.4GHz FPC antenna, and high-power LoRa output make it a ready-to-use platform for long-range wireless projects.



This board is beginner-friendly yet powerful, supporting development with Arduino, PlatformIO, ESP-IDF, and MicroPython. With upgraded lithium battery management, optional solar input support, and ultra-low sleep current below 20 µA, it is well suited for IoT, Meshtastic, LoRaWAN, and mesh networking applications in smart city, industrial, and remote sensing environments.

Quick Spec

• MCU: ESP32-S3R2 dual-core Xtensa® LX7
• LoRa Chip: SX1262
• LoRa Frequency: 863–928 MHz (high-power version)
• Max LoRa TX Power: 28 ±1 dBm
• Receiving Sensitivity: up to -137 dBm @ SF12 / 125 kHz
• Wi-Fi: 802.11 b/g/n
• Bluetooth: BLE, Bluetooth 5, Bluetooth Mesh
• Memory: 2MB PSRAM, 16MB external Flash
• Display: Onboard 0.96" OLED with protective casing
• Antennas: 2.4GHz FPC antenna + IPEX connector, LoRa IPEX connector
• Interfaces: USB Type-C, Li-ion battery (1.25-2P), GNSS header (1.25-8P)
• Battery Support: 3.3–4.4V lithium battery
• Ultra-Low Power: <20 µA sleep current
• Dimensions: 51.7 × 25.4 × 10.7 mm

Product Video

Heltec Wireless Stick V3 vs V4 Comparison

Board Layout

Pinout

Resources

• Product Page
• Heltec MQB Platform
• User Manual
• Schematic
• Datasheet
• Heltec ESP32 Development Framework (Board Manager, Basic Examples)
• Heltec ESP32 Extension Libraries (LoRa/LoRaWAN, Sensors, etc.)

Shipping List

• 1 x Heltec Wireless Stick V4 (ESP32-S3 + LoRa)
• 1 x LoRa Antenna
• 2 x 1.25mm 2-Pin Connector (for battery & solar)
• 2 x 2.54mm 18-Pin Header Pins
• 2 x 2.54mm 2-Pin Header Pins