Meshnology - N39 Heltec WiFi LoRa 32 V4 – Upgraded ESP32-S3 LoRa Development Board
The Meshnology - N39 Heltec WiFi LoRa 32 V4 is the fully upgraded successor to the classic LoRa development board series that has been loved by developers and makers since 2017. Building on the powerful features of previous generations, the V4 introduces major improvements in transmit power, power management, expandability, and overall hardware design.
This board is ideal for a wide range of IoT applications, including smart cities, agricultural monitoring, smart homes, industrial automation, security systems, and wireless metering—delivering developers a more efficient and flexible development experience.
Key Features
- ESP32-S3R2 + SX1262 chipset – Supports Wi-Fi (802.11 b/g/n), Bluetooth BLE, and LoRa communication.
- Memory Upgrade – 2MB embedded PSRAM + 16MB external Flash, optimized for UI rendering and complex systems.
- Boosted LoRa Transmission Power – Up to 27±1dBm for stronger long-range communication.
- Compatible Design – Same form factor and pin layout as WiFi LoRa 32 V3, easy upgrade path.
- Integrated PC Casing & Antenna – Enclosed screen protection with built-in 2.4GHz FPC antenna for durability and signal stability.
- Solar Power Support – Added SH1.25-2P solar panel interface (supports 4.4–6V / ≤540mA).
- Optimized Battery Management – Smart charging/discharging, overcharge protection, power detection, and seamless USB/battery switching.
- Enhanced Expansion – Added SH1.25-8Pin GNSS interface for positioning modules.
- USB Type-C Interface – With built-in voltage regulation, ESD protection, short-circuit protection, and RF isolation.
- Ultra-Low Power Consumption – Less than 20μA, with independent GNSS power control.
Package Includes
Heltec WiFi LoRa 32 V4 development board
3000mAh rechargeable Li-ion battery (pre-installed)
N39 protective case
863~928MHz antenna
Dimensions and Weight
Board with case: approx. 85mm*45mm*35mm
Total weight: approx. 100g (including battery and case)
V3 vs V4 – Comparison Table
| Feature | ESP32 LoRa 32 V3 | WiFi LoRa 32 V4 (Upgraded) |
|---|---|---|
| Main MCU | ESP32-S3FN8, dual-core, up to 240MHz | ESP32-S3R2, dual-core, 2MB PSRAM, 16MB Flash |
| LoRa-Chip | SX1262 | SX1262 |
| USB Interface | Type-C, with voltage regulation & ESD protection | Type-C, with voltage regulation, ESD, short-circuit protection, RF isolation |
| USB-to-Serial Chip | Integrated CP2102 | Removed – simpler design, lower cost |
| Display | 0.96″ 128×64 OLED | 0.96″ OLED (with PC casing protection) |
| Antenna | 2.4GHz spring antenna | Integrated FPC 2.4GHz antenna with casing + IPEX connector |
| Battery Interface | SH1.25-2, with charge/discharge management | SH1.25-2, optimized management, solar panel input (4.4–6V / ≤540mA) |
| GPS Interface | Nicht verfügbar | Added SH1.25-8Pin GNSS interface |
| Wireless Connectivity | Wi-Fi b/g/n, Bluetooth 5 (LE), LoRa | Wi-Fi b/g/n, Bluetooth 5 (LE), LoRa |
| Memory | 384KB ROM, 512KB SRAM, 16KB RTC SRAM, 8MB Flash | 2MB PSRAM + 16MB Flash |
| LoRa TX Power | 21 ±1dBm | 27 ±1dBm (High Power Upgrade) |
| Power Consumption | Low-power design | Ultra-low <20μA, GNSS power independently controllable |
| Dimensions | 50.2 × 25.5 × 10.2 mm | Similar footprint (V3 pin-compatible) |
| Operating Temp. | -20 ~ 70 ℃ | -20 ~ 70 ℃ |
| Development Support | Arduino IDE | Arduino + extended compatibility |
| Notable Extras | CP2102 for programming/debug | Solar input, stronger LoRa, GNSS, casing protection |
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.
| Farbe |
Green, Black, Twilight Purple, Green+Black, Green+Twilight Purple, Black+Twilight Purple, Green+Black+Twilight Purple |
|---|---|
| Size |
Only Case, 1 Set (Board+Battery+Case), 2 Sets (Board+Battery+Case) |
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.
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.)
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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).
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- Australia / Europe: 8-20 business days
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- 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.
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- 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.
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