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Product Highlights
SPECIFICATIONS
Accessory Type: USB To DC Cable
Battery Included: no
Bluetooth: Bluetooth LE, Bluetooth 5, Bluetooth mesh
Brand Name: Heltec Automation
Compatible With: Lora 32 V4
Dimensions: 51.7 * 25.4* 10.7mm
Frequency: 470~510MHz, 863~928MHz
High-concerned chemical: none
LoRa Node Chip: SX-1262
Master Chip: ESP32-S3R2
Max. Receiving sensitivity: -137 dBm
Max. TX Power: 21±1dBm, 27±1 dBm
OLED: SSD1315(0.96Inch, 128*64 resolution)
Operating Temperature: -40~85℃(OLED operating temperature: -40~ 70°C)
Origin: Mainland China
Power Supply: 5V@USB, 3.3-4.2V@Battery
Typical Application Fields: Internet of Things (IoT)
Wi-Fi: 802.11 b/g/n, up to 150Mbps
Summary
● Heltec WiFi LoRa 32 V4 is a fully upgraded version of the classic LoRa development board. Since
its initial launch in 2017, this product series has been highly favored by developers and makers.
● Building upon the powerful features of its predecessors, the V4 version introduces comprehensive
optimizations in Transmit Power, power management, expandability and other hardware design.
● It is suitable for various IoT applications such as smart cities, agricultural monitoring, smart homes,
industrial control,security systems, and wireless meter reading, providing developers with a more
efficient and flexible development experience.
●More detailed WiFi LoRa 32(V4) introduction-Scan&Watch for more on
Youtube.
https://youtu.be/JRidd85Rm5U?si=RMP22rGAFhoh5dAM
Main Features
● Base on ESP32-S3R2 & SX-1262, supports Wi-Fi b/g/n, BLE, and LoRa communication.
● 2MB PSRAM and 16MB external Flash, more suitable for UI and complex system .
● High-power version with LoRa transmission power increased to 27±1dBm.
● Form factor and pin compatibility with WiFi LoRa 32 V3.
● PC casing protects the screen and integrates FPC 2.4G antenna.
● Added SH1.25-2P solar panel interface.
● Optimized lithium battery management.
● Added SH1.25-8Pin GNSS interface.
● USB Type-C interface with integrated voltage regulation, ESD protection, short-circuit protection,
and RF isolation design.
● Low power consumption is less than 20μA.
Compared to WiFi LoRa 32 V3 has made the following upgrades:
Docs & Resource
● User manual
https://docs.heltec.org/en/node/esp32/wifi_lora_32/index.html
●Heltec ESP(ESP32 &ESP8266) framework
https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series
● Heltec ESP32 library
https://github.com/HelTecAutomation/Heltec_ESP32
● Schematic diagram
https://resource.heltec.cn/download/WiFi_LoRa_32_V4/Schematic
● Downloadable resource
https://resource.heltec.cn/download/WiFi_LoRa_32_V4
Pin Map
Specifications
Parameters |
Description |
MCU |
ESP32-S3R2 (Xtensa®32-bit lx7 dual core processor) |
LoRa Node Chip |
SX1262 |
Frequency |
High-power version: 863-928MHz |
Max. TX Powe |
High-power version: 28 ±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 |
Hardware Resource |
7*ADC1 + 2*ADC2; |
Memory |
384KB ROM; 512KB SRAM; 16KB RTC SRAM; 2MB PSRAM; 16MB Flash |
Interface |
Type-C USB; |
Battery applicable |
3.3-4.4V lithium battery |
Operating Temperature |
-20 ~ 70 ℃ |
Dimensions |
51.7 * 25.4* 10.7mm |
Packing List
The default packing list without selecting any accessories is as follows:
1.Standard configuration (with spring antenna)
2.Standard configuration+GPS module (with spring antenna)
FAQ
Q1: 2.4GHz Antenna
A1: 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.
Q2: What development methods does it support?
A2:
●Arduino
●Micro Python
●Platform.io
●Espressif IDE
We strongly recommend using Arduino. We have complete technical support and provide complete
LoRaWAN code for ESP32 Arduino framework.
Q3: What’s the battery socket type?
A3: You can find this type of socket by search “SH1.25 x 2”.
Q4: Can I order a version without the OLED display?
A4: Of course, you can contact our sales staff and provide your ideas.
Q5: Are V3 and V4 compatible?
A5: 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.
Q6: Failed to upload code
A6: Please try the following steps:
1.Try using a different USB cable.
2.Enter BootLoader mode. There are two methods to enter this mode:
●Hold down the PRG button, connect the USB-C cable, then release the PRG button.
●Connect the USB-C cable, hold down the PRG button, press the RST button once, then release
the PRG button.
Shipping and Return Policy
- Shipping: Shipping is free on orders above 70$. Domestic orders can take 4-8 business days whereas international shipping may take 15-25 days. Standard Shipping may vary on State and Location.
- Returns: We offer a 30-day return policy on items in new, unused condition. Please contact our customer support team to initiate a return. A restocking fee may apply.