SPECIFICATIONS

Accessory Type: Extension Board

Battery Included: no

Bluetooth: Bluetooth LE, Bluetooth 5, Bluetooth mesh

Brand Name: Heltec Automation

Choice: yes

Compatible With: heltec lora 32 v4

Dimensions: 51.7 * 25.4* 10.7mm

Frequency: 863~928 MHz

High-concerned chemical: none

LoRa 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

semi_Choice: yes

Note:

Batteries are not included in this listing!

If you wish to purchase batteries, please click the link below:

Heltec 3.7V LiPo Battery 800mAh 3000mAh SH1.25 Connector for LoRa 32 V3 V4 T114 Wireless Stick Meshtastic Node Kit - AliExpress 44

Docs & Resource

Summary

The WiFi LoRa 32 V4, the next gen to the Heltec V3, is a powerful, high-efficiency IoT maker board

featuring an ESP32S3 MCU and SX1262 LoRa Node chip; retaining the V3’s size and identical pinout, it

integrates performance upgrades including a built-in Wi-Fi/Bluetooth antenna, 28±1dBm LoRa output

power, and a protected OLED display; its superior RF and stable system design ensure it’s ready-to-use

and highly beginner-friendly, supporting development via Arduino, PlatformIO, ESP-IDF, and

MicroPython; making it ideal for long-range wireless open-source projects like Meshtastic, LoRaWAN,

and Meshcore in applications such as smart cities and industrial control, with custom hardware available

on the Heltec MQB platform.

Specification

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.

• LoRa Transmit Power: High-power version 28 dBm, Low-power version 22 dBm

• PC casing protects the screen and integrates FPC 2.4G antenna.

• Form factor and pin compatibility with WiFi LoRa 32 V3.

• PC casing protects the screen and integrates FPC 2.4G antenna.

• Added 1.25-2Pin solar panel interface, and 1.25-8Pin GNSS interface.

• Optimized lithium battery management.

• Low power consumption is less than 20μA.

FAQ

German Warehouse Supported Countries/Regions (Click to View)

Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Hungary,Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland, United Kingdom

US Warehouse Supported States/Regions (Click to View):

South:

Alabama, Arkansas, Delaware, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississipp, North Carolina,Oklahoma, South Carolina, Tennessee, Texas, Virginia, West Virginia

Midwest:

llinois, Indiana, lowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, Pennsylvania,South Dakota, Wisconsin

West:

Arizona, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, Wyoming

Northeast:

Connecticut, District of Columbia, Maine, Massachusetts, New Hampshire, New Jersey, New York, RhodeIsland, Vermont

Not Supported:

Alaska, Hawaii, Puerto Rico

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 thediagram below, and add a 0-ohm resistor (or other conductive metal or cable) at the position marked 2 toconnect to the IPEX interface.

My screws look a bit odd?

This area is attached with a 2.4G FPC antenna,and to avoid affecting its performance, customized plastic screws are used here.

That’s why they look different from ordinary screws.

When you need to remove it, gently press and turn with a screwdriver.

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 completeLoRaWAN code for ESP32 Arduino framework.

What's the battery socket type?

You can find this type of socket by search "SH1.25 x 2".

Can I order a version without the OLED display?

Of course, you can contact our sales staff and provide your ideas.

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 pinlayout, 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 longercorrespond directly to the actual output.

Failed to upload code

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 releasethe PRG button.

Why are there no resistors soldered on the 868 and 915 markings? Which frequency band does my device
actually support?

It indicates simultaneous support for both 868 MHz and 915 MHz frequency bands.

In the initial design, we developed two separate hardware versions to achieve optimal RF performance. However, through subsequent debugging, we have successfully unified the hardware for both 868 MHz and 915 MHz while maintaining excellent RF characteristics.

"LoRa Error"

It does not indicate device damage. Please disregard this phenomenon. The LORA ERRoR occurs because it is running the factory default LORA testing program and cannot find another device running the same
program.