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 | Description |
|---|---|
| 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.
| Model |
With Screen + Antenna, With Screen + Antenna + GPS |
|---|
Thank You for Your Purchase!
We hope you are happy with your purchase. However, if you are not completely satisfied for any reason, you may return it for a full refund, store credit, or exchange. Please see below for more details on our return policy.
RETURNS
- All returns must be postmarked within seven (7) days of the purchase date.
- Items must be in new and unused condition, with all original tags and labels attached.
RETURN PROCESS
Return Address Request
To obtain the return address, please contact us via email before sending your return. We will provide you with the correct return details.
📧 Email us at: support@meshnology.com
Thank you for your understanding!
📌 Note: Customers are responsible for all return shipping costs. We strongly recommend using a trackable shipping method.
REFUNDS
- After receiving and inspecting your return, we will process your refund or exchange.
- Please allow at least seven (7) days from the receipt of your item for processing.
- Refunds may take 1-2 billing cycles to appear on your credit card statement, depending on your credit card company.
EXCEPTIONS
The following items cannot be returned or exchanged:
- Improper or unreasonable use or maintenance
- Failure to follow operating instructions
- Accidents or excessive moisture damage
- Damage from insects, lightning, or power surges
- Connections to improper voltage supplies
- Unauthorized alterations or modifications
- Damage from inadequate packing or shipping procedures
- Use with other incompatible products
- Products that require modification for use outside their intended country
- Items purchased from unauthorized dealers
For defective or damaged products, please contact us at the email below to arrange a refund or exchange.
QUESTIONS?
If you have any questions about our return policy, feel free to contact us:
Our goal is to offer you the best shipping options, no matter where you live. Every day, we deliver to hundreds of customers across the world, ensuring that we provide the highest levels of responsiveness to you at all times.
Important Shipping Update for US Customers
Due to the rising cost of tariffs, we regret to inform our US customers that additional shipping fees will be applied as follows:
- Orders under $100: $10 additional shipping fee
- Orders between $100 and $200: $20 additional shipping fee
- Orders over $200: $30 additional shipping fee
We appreciate your understanding and continued support. Should you have any questions, feel free to contact us. Thank you!
Shipping Rules:
- Before the order ships, you can cancel it, change the address information, and modify the shipping method. (We cannot change shipping addresses, shipping methods, or cancel your order after it has been shipped.)
- No return service is available once your package arrives at your local destination. If your address is incorrect or you do not pick up the package on time, it will most likely be destroyed locally. (Once your package is shipped, we will update the tracking information for you. Please pay attention to it, and contact us at support@meshnology.com or message us online if you have any issues.)
- For any abnormal orders, we will contact you via email or WhatsApp within 3 working days. If there is no reply within two days, the order will be canceled by default (e.g., due to items being sold out, pricing issues, shipping method restrictions, additional shipping fees, or battery-related restrictions).
- Customers are responsible for paying customs taxes.
How Long Until Your Order Ships?
- In stock: We will ship your order within 1-2 working days.
- Pre-order: Usually takes 2-7 working days, except for certain products.
Shipping Methods & Delivery Times
We currently offer three shipping methods:
- Free Standard Shipping - Your orders will be shipped via Standard Shipping by default (except for remote areas).
- Expedited Shipping - If you prefer faster delivery via DHL, FedEx, UPS, etc., you will need to pay an extra shipping fee.
- Ocean Shipping (USA Only) - Available for shipments to the USA.
Estimated Delivery Times (Standard Shipping):
- USA: 7-18 business days
- Japan: 4-12 business days
- Australia / Europe: 8-20 business days
- Canada: 12-25 business days
- Southeast Asia: 4-12 business days
- Turkey: 7-16 business days
- Russia: 20-50 business days
- Other Countries: 15-20 business days
Please Note:
- These are estimated delivery times; we cannot guarantee an exact delivery date.
- Orders containing batteries may experience longer shipping times.
- We are not responsible for shipping delays beyond our control.
Battery Shipping Restrictions
- We CANNOT ship batteries to the following countries:
Turkey, India, Germany, Brazil, Mexico, Chile, New Zealand, etc.
(If your order contains a battery and we have no shipping method available, we will contact you to change the product or cancel the order.) - We CAN ship batteries to these countries:
USA, Japan, Russia, Austria, Belgium, Czech Republic, Denmark, France, Hungary, Ireland, Italy, Luxembourg, Norway, Poland, Portugal, Slovakia, Spain, Sweden, Switzerland, Netherlands.
Customs Clearance & Taxes
- Customers are responsible for customs taxes.
- If customs clearance cannot be completed due to customer-related reasons, we cannot provide a refund.
Warehouses
- US Warehouse – Ships only to US addresses.
- CN Warehouse – Ships internationally.
- If no warehouse option is displayed on the product page, the order will be shipped from the CN warehouse.
For further assistance, please contact us at support@meshnology.com.
