# Heltec WiFi LoRa 32 V4

> ESP32-S3 based LoRa development board with built-in 0.96" OLED display, SX1262 LoRa transceiver, WiFi, BLE 5.0, USB-C, and LiPo battery charging. One of the most popular boards for Meshtastic.

## Quick Facts

- **Brand:** Heltec
- **Board Type:** dev-board
- **Price:** ~$30.99
- **Product Readiness:** developer
- **CPU:** ESP32-S3
- **CPU Architecture:** Xtensa LX7
- **CPU Cores:** 2
- **RAM:** 512KB SRAM
- **Flash:** 8 MB
- **USB:** USB-C
- **Power:** 5V + LiPo
- **Operating Voltage:** 3.3V
- **Charging Port:** USB-C
- **Antenna:** IPEX/U.FL
- **Display:** 0.96" OLED 128x64

## Connectivity

- **Wifi:** 802.11 b/g/n
- **Bluetooth:** BLE 5.0
- **Lora:** SX1262 868/915MHz

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Compatible Firmware

arduino, esp-idf, meshtastic, micropython

## Use Cases

- lora-mesh-networking
- meshtastic
- iot-gateway
- environmental-monitoring
- off-grid-communication

## Components

- **ESP32-S3FN8** (mcu): Dual-core Xtensa LX7 microcontroller at 240 MHz with WiFi and BLE 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-wifi-lora-32-v4&source=md-export)
- **SX1262** (radio): Semtech LoRa transceiver, 433/868/915 MHz, +21 dBm TX power — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=heltec-wifi-lora-32-v4&source=md-export)
- **SSD1306** (display): 0.96" 128x64 monochrome OLED display controller — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=heltec-wifi-lora-32-v4&source=md-export)
- **CP2102** (interface): USB-to-UART bridge for serial programming — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=heltec-wifi-lora-32-v4&source=md-export)

## Protocols

- **UART**
- **I2C**
- **SPI**

## Description

## Overview\n\nThe Heltec WiFi LoRa 32 V4 is a compact development board built around the ESP32-S3 microcontroller and Semtech SX1262 LoRa transceiver. It features an integrated 0.96-inch OLED display, WiFi, Bluetooth 5.0 LE, USB-C connectivity, and a built-in LiPo battery charging circuit.\n\nThis board is one of the most widely used platforms for Meshtastic, an open-source mesh networking firmware for off-grid communication. It also supports Arduino, ESP-IDF, MicroPython, and LoRaWAN applications.\n\n## Key Features\n\n- **ESP32-S3** dual-core Xtensa LX7 processor at up to 240 MHz\n- **SX1262** LoRa transceiver supporting 433/868/915 MHz bands\n- **0.96\" OLED** display (128x64, SSD1306) for status and debugging\n- **WiFi 802.11 b/g/n** with onboard spring antenna\n- **Bluetooth 5.0 LE** for configuration and data transfer\n- **USB-C** for programming and power\n- **LiPo battery** charging via SH1.25-2 connector\n- **IPEX/U.FL** connector for external LoRa antenna\n\n## Specifications\n\n| Spec | Value |\n|------|-------|\n| MCU | ESP32-S3FN8 (dual-core LX7, 240 MHz) |\n| Flash | 8 MB |\n| SRAM | 512 KB |\n| LoRa | SX1262, up to +21 dBm TX, -134 dBm RX sensitivity |\n| Display | 0.96\" 128x64 OLED (SSD1306) |\n| USB | Type-C (CP2102 serial) |\n| Battery | 3.7V LiPo via SH1.25-2 connector |\n| Dimensions | 50.2 x 25.5 x 10.2 mm |\n| Weight | 35g |\n\n## Meshtastic\n\nThis board is fully supported by Meshtastic firmware out of the box. Flash it via the Meshtastic web flasher or CLI, connect a LoRa antenna, and you have an off-grid mesh communication node.

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fheltec-wifi-lora-32-v4&ref=openhardware.directory&product=heltec-wifi-lora-32-v4&source=md-export) — $28.95
- [Heltec Official](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwifi-lora-32-v3%2F&ref=openhardware.directory&product=heltec-wifi-lora-32-v4&source=md-export) — $18.90

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwifi-lora-32-v3%2F&ref=openhardware.directory&product=heltec-wifi-lora-32-v4&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHeltec-Aaron-Lee%2FWiFi_Kit_series&ref=openhardware.directory&product=heltec-wifi-lora-32-v4&source=md-export)

## Tags

`esp32-s3`, `lora`, `meshtastic`, `oled`, `sx1262`, `heltec`, `iot`, `lorawan`

## Images

![Heltec WiFi LoRa 32 V4](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wifi-lora-32-v4/97e5dbd27ec4.png)
![Heltec WiFi LoRa 32 V4](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wifi-lora-32-v4/6e956bfd2a4f.png)
![Heltec WiFi LoRa 32 V4](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wifi-lora-32-v4/8a2cb81e26a0.png)
![Heltec WiFi LoRa 32 V4](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wifi-lora-32-v4/78a1957b57b5.png)
![Heltec WiFi LoRa 32 V4](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wifi-lora-32-v4/050e3fd83b47.png)
![Heltec WiFi LoRa 32 V4](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wifi-lora-32-v4/771ec82417dd.png)
![Heltec WiFi LoRa 32 V4](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wifi-lora-32-v4/719b99043bf7.png)
![Heltec WiFi LoRa 32 V4](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wifi-lora-32-v4/292b72e589e9.png)

> **Battery Powered:** Li-Po

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