The WiFi LoRa 32 V3 is the latest evolution of Heltec Automation’s iconic IoT development board—first introduced in 2017 and widely embraced by makers and developers. This upgraded version maintains the same pinout as V2 while integrating Wi-Fi, Bluetooth 5 (LE), LoRa, and a 0.96-inch OLED display, making it an ideal platform for Meshtastic mesh networks, smart city infrastructure, industrial automation, home security, and other IoT applications.
Powered by the ESP32-S3FN8 dual-core processor and the SX1262 LoRa transceiver, it supports development in Arduino, MicroPython, and other environments. With a USB Type-C interface, onboard lithium battery management, and a low-power design, it delivers reliable performance for both mobile and fixed deployments. Its robust RF circuit and flexible expansion options make it a go-to choice for building Meshtastic nodes, LoRaWAN gateways, and custom wireless solutions.
Features
🧠 Microprocessor: ESP32-S3FN8 (Xtensa® 32-bit LX7 dual-core, 5-stage pipeline, up to 240 MHz)
📡 LoRa Chip: SX1262 transceiver for long-range communication
🔌 USB Type-C interface with onboard voltage regulation, ESD protection, short-circuit protection, and RF shielding
🔋 Battery Interface: SH1.25-2 connector with integrated lithium battery management (charge/discharge, overcharge protection, voltage detection, auto USB/battery switching)
📟 Display: 0.96" 128×64 OLED screen for debug info, battery status, and more
🌐 Triple wireless: Built-in Wi-Fi, LoRa, and Bluetooth with a 2.4GHz metal spring antenna + IPEX (U.FL) connector for external LoRa antenna
💾 USB-to-Serial: Onboard CP2102 chip for easy firmware flashing and serial debugging
🛠️ Arduino IDE support: Perfect for embedded development and quick prototyping
⚙️ Optimized RF and power design: Great for low-power IoT applications
Specifications
| Parameters | Description |
|---|---|
| Master Chip | ESP32-S3FN8 (Xtensa®32-bit lx7 dual core processor) |
| LoRa Node Chip | SX1262 |
| USB to Serial Chip | CP2102 |
| Frequency | 470~510MHz, 863~928MHz |
| Max. TX Power | 21±1dBm |
| Max. Receiving sensitivity | -134dBm@SF12 BW=125KHz |
| Wi-Fi | 802.11 b/g/n, up to 150Mbps |
| Bluetooth | Bluetooth 5 (LE) |
| Hardware Resource | 7*ADC1 + 2*ADC2; 7*Touch; 3*UART; 2*I2C; 2*SPI; etc. |
| Memory | 384KB ROM; 512KB SRAM; 16KB RTC SRAM; 8MB SiP Flash |
| Interface | Type-C USB; 2*1.25 lithium battery interface; LoRa ANT(IPEX1.0); 2*18*2.54 Header Pin |
| Battery | 3.7V lithium battery power supply and charging |
| Operating Temperature | -20 ~ 70 ℃ |
| Dimensions | 50.2 * 25.5* 10.2 mm |
