HELTEC WiFi LoRa 32 V4.3.1 is a next-generation ESP32-S3 + SX1262 LoRa development board built for long-range, low-power wireless projects. This hardware revision is V4.3.1, and that version detail matters…
100% Secure Payment & Data Safety
Global Delivery & Fast Dispatch
30 Days Free Return & Exchange
HELTEC WiFi LoRa 32 V4.3.1 is a next-generation ESP32-S3 + SX1262 LoRa development board built for long-range, low-power wireless projects. This hardware revision is V4.3.1, and that version detail matters because hardware 4.3.1 supports Meshtastic and MeshCore when flashed with the correct firmware path for this board generation. It is a strong fit for Meshtastic, MeshCore, LoRaWAN, off-grid messaging, solar-powered routers, private mesh communication, and GNSS-enabled LoRa applications.
Powered by the ESP32-S3R2 and SX1262, the board combines Wi-Fi, Bluetooth 5 / BLE / Bluetooth Mesh, and LoRa in a compact developer-friendly format. With 2MB PSRAM, 16MB external Flash, up to 28 dBm LoRa TX power, solar input, GNSS expansion, and optimized battery management, it is especially suitable for Meshtastic nodes, MeshCore nodes, LoRaWAN sensor networks, outdoor relay nodes, smart agriculture, remote telemetry, and low-power field deployments.
| Hardware Version | V4.3.1 |
| MCU | ESP32-S3R2 (Xtensa 32-bit LX7 dual core processor) |
| LoRa Chip | SX1262 |
| Frequency | High-power version: 863-928MHz; low-power version: 433 / 470-510 / 863-928MHz |
| Max TX Power | High-power: 28 1 dBm; low-power: 21 1 dBm |
| Max Receiving Sensitivity | -137dBm @ SF12 BW=125KHz |
| Wi-Fi | 802.11 b/g/n, up to 150Mbps |
| Bluetooth | Bluetooth LE, Bluetooth 5, Bluetooth Mesh |
| Memory | 384KB ROM; 512KB SRAM; 16KB RTC SRAM; 2MB PSRAM; 16MB Flash |
| Hardware Resources | 7 x ADC1, 2 x ADC2, 7 x Touch, 3 x UART, 2 x I2C, 2 x SPI and more |
| Interfaces | Type-C USB; 1.25 x 2 Pin lithium battery; 1.25 x 2 Pin solar; 1.25 x 8 Pin GNSS; LoRa ANT (IPEX1.0); 2.4G ANT (IPEX1.0) |
| Battery Range | 3.3V-4.4V lithium battery |
| Operating Temperature | -20 to 70 C |
| Dimensions | 51.7 x 25.4 x 10.7 mm |
Why hardware version 4.3.1 matters
This board should not be treated as a generic V4 device. The actual hardware version is 4.3.1, and that is the version that should be matched when selecting firmware, flashing tools, and ecosystem images. If firmware selection is wrong, features may not behave correctly.
Meshtastic and MeshCore on V4.3.1
This hardware version is suitable for both Meshtastic and MeshCore. For Meshtastic, use the Meshtastic Web Flasher and choose firmware compatible with the V4.3.x generation. For MeshCore, start from the MeshCore official site and MeshCore flasher, making sure the selected image matches the 4.3.1 hardware revision.
Hardware Comparison HELTEC WiFi LoRa 32 V4 vs V3
| Parameter | V3 | V4 |
|---|---|---|
| MCU | ESP32-S3FN8 | ESP32-S3R2 |
| Flash | 8MB integrated | 16MB external |
| USB to Serial Chip | CP2102 | Removed CP2102 |
| Power Management | Standard Li-ion management IC | Upgraded IC supporting solar input |
| Solar Input | Not available | Added SH1.25-2P interface |
| LoRa TX Power | 211dBm | 281dBm |
| 2.4G Antenna | Metal spring antenna | FPC antenna + IPEX connector |
| GPS Interface | Not available | Added SH1.25-8Pin interface |
| Peripheral I/F | 36-pin | 40-pin |
| Screen Connection | Soldered | Soldered + B2B connector |
| Pin Craft | Silver-plated | Gold-plated |
| Screen Bracket | Partial protection | Full protection |
Highlights HELTEC WiFi LoRa 32 V4.3.1
More Powerful MCU
The ESP32-S3R2 plus 2MB PSRAM and 16MB Flash make this board much better suited for rich UI, multitasking, gateway logic, and complex wireless applications than earlier revisions.
Higher Transmission Power
The high-power version reaches 28 1 dBm, which is one of the main reasons this board is so relevant for Meshtastic routers, outdoor nodes, and extended-range LoRa projects.
More Peripheral Interfaces
The board adds a solar interface, a GNSS interface, and a dedicated lithium battery interface, making it much easier to build self-powered field nodes.
Compatible with V3 Pinout
The board largely preserves the V3 footprint and pin layout while upgrading pin quality from silver plating to gold plating and adding more usable interfaces.
Layout
Pin Map
2.4G antenna routing note for hardware 4.3
The board defaults to the FPC antenna, while the alternate mark indicates the IPEX connection path. This matters if you are modifying the board for external 2.4G antenna use.
| Item | Quantity |
|---|---|
| WiFi LoRa 32 (V4) | x1 |
| LoRa Antenna | x1 |
| SH1.252 Connector (for battery&solar) | x2 |
| 2.54*18 Header Pin | x2 |
| 2.54*2 Header Pin | x2 |
| GPS module | x1 |
Yes. Hardware version 4.3.1 supports Meshtastic when flashed with the correct V4.3.x-compatible firmware image.
Yes. Hardware version 4.3.1 supports MeshCore when flashed with the correct firmware image for the V4.3.x board generation.
Enter BootLoader mode: connect USB-C, hold the PRG button, press the RST button once, then release PRG. If that still fails, try a different USB data cable, a different USB port, or the ESP32 flasher tool guide.
We offer fast and reliable shipping worldwide. All orders are carefully packaged and shipped within 1–3 business days after payment confirmation.
Standard shipping, expedited shipping and express delivery options are available at checkout. Delivery time depends on your destination country and local logistics.
Only logged in customers who have purchased this product may leave a review.
Add Related products to weekly line up
Special Ofers For Subscribers
