Heltec WiFi LoRa 32 V4 ESP32-S3 IoT Development Board, Meshtastic Compatible
1. High-Performance ESP32-S3 Platform – Dual-core Xtensa LX7 processor for advanced IoT workloads
2. Long-Range LoRa Communication – SX1262 transceiver with high sensitivity and stable transmission
3. Multi-Protocol Connectivity – Supports Wi-Fi (802.11 b/g/n), Bluetooth 5.0 (LE & Mesh), and LoRa
4. Large Memory Resources – 16MB Flash + 2MB PSRAM for complex applications
5. GNSS Expansion Ready – SH1.25-8Pin interface for GPS module integration
6. Compact & Developer Friendly – Designed for rapid prototyping and embedded development
Product Description
HELTEC WiFi LoRa 32 V4 – ESP32-S3R2 & SX1262 Development Board
The HELTEC WiFi LoRa 32 V4 is an upgraded IoT development board based on the ESP32-S3R2 dual-core processor and SX1262 LoRa chip. Designed for high-performance wireless applications, it supports Wi-Fi, Bluetooth 5 (LE & Mesh), and long-range LoRa communication. Featuring optimized power management, solar panel input, and GNSS interface, this board is ideal for advanced IoT, sensor networks, and outdoor projects.
Main Features
- Based on ESP32-S3R2 dual-core processor & SX1262 LoRa chip
- Supports Wi-Fi b/g/n, Bluetooth 5.0 (LE & Mesh), and LoRa
- Integrated 2MB PSRAM and 16MB Flash
- LoRa Transmit Power: High-power version up to 28 dBm
- Optimized battery management with solar input support
- SH1.25-8Pin GNSS interface for GPS modules
- FPC antenna + IPEX connector for flexible 2.4G performance
- Low power consumption: <20μA in deep sleep
Specifications
| Parameter | Descrizione |
|---|---|
| MCU | ESP32-S3R2, Xtensa® 32-bit LX7 dual-core |
| LoRa Chip | SX1262 |
| Frequency | 863-928MHz (High Power) / 433-928MHz (Low Power) |
| Max TX Power | 28 ±1 dBm (High Power) |
| Receiving Sensitivity | -137 dBm @SF12 BW=125KHz |
| Wi-Fi | 802.11 b/g/n, up to 150Mbps |
| Bluetooth | Bluetooth 5.0 (LE & Mesh) |
| Memory | 2MB PSRAM, 16MB Flash, 512KB SRAM |
| Interfaces | USB Type-C, SH1.25 battery & solar, GNSS interface, IPEX antenna ports |
| Battery | 3.3V–4.4V lithium battery |
| Operating Temp | -20 ~ 70 ℃ |
| Dimensions | 51.7 × 25.4 × 10.7 mm |
Packing List
- 1x HELTEC WiFi LoRa 32 V4 Board
- 1x LoRa Antenna
- 2x SH1.25×2 Connector (battery & solar)
- 2x 2.54×18 Header Pin
- 2x 2.54×2 Header Pin
Frequently Asked Questions
Q: 2.4GHz Antenna
The default 2.4G FPC antenna is located on the side of the plastic screen bracket.
If you wish to use an IPEX-connected 2.4G antenna, you need to remove the inductor marked as ① in the diagram below, and add a 0-ohm resistor (or other conductive metal or cable) at the position marked ② to connect to the IPEX interface.
Q: What development methods does it support?
- Arduino
- Micro Python
- Platform.io
- Espressif IDE
We strongly recommend using Arduino. We have complete technical support and provide full LoRaWAN code for the ESP32 Arduino framework.
Q: What’s the battery socket type?
You can find this type of socket by searching “SH1.25 x 2”.
Q: Are V3 and V4 compatible?
They are compatible in most scenarios.
Since V4 uses the same series of chips as V3, features the same OLED, and has an almost identical pin layout, V3 and V4 can be used interchangeably in the majority of cases.
However, due to the increased transmit power, the transmit power settings in some code may no longer correspond directly to the actual output.
Q: Failed to upload code
Please try the following steps:
• Try using a different USB cable.
• Enter BootLoader mode. Two methods:
1. Hold down the PRG button, connect the USB-C cable, then release the PRG button.
2. Connect the USB-C cable, hold down the PRG button, press the RST button once, then release the PRG button.
Take a Closer Look
Specification
| Item | Specification |
|---|---|
| MCU | ESP32-S3R2 (Xtensa LX7 dual-core) |
| LoRa Chip | SX1262 |
| Frequency Range | 863–928MHz (High Power) / 433–928MHz (Low Power) |
| Max TX Power | Up to 28 dBm |
| Receiving Sensitivity | -137 dBm @ SF12, BW=125KHz |
| Wi-Fi | 802.11 b/g/n (up to 150Mbps) |
| Bluetooth | Bluetooth 5.0 (BLE & Mesh) |
| Memory | 16MB Flash / 2MB PSRAM / 512KB SRAM |
| Interfaces | USB Type-C, GNSS port, battery & solar input, IPEX antenna |
| Battery | 3.3V–4.4V lithium battery |
| Operating Temperature | -20°C ~ 70°C |
| Dimensions | 51.7 × 25.4 × 10.7 mm |
Warranty & After-Sales
Technical Support & Resources
