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Docs & Resource
Summary
"WiFi LoRa 32 V3 also called Heltec V3, durable IoT maker kit powered by the ESP32S3 MCU and
SX1262 LoRa Node chips, intergrated three wireless communication ways ——LoRa、BLE、Wi-Fi，
along with an on-board OLED display, it presents a robust, all-in-one solution.
Its superior RF design and stable, minimal system design ensure the product is ready-to-use and support
for development methods like Arduino, Platform IO, ESP-IDF, and MicroPython makes it beginner-
friendly. It is now widely used in well-known long-range wireless open-source projects such as Meshtastic
and Meshcore, serving applications in smart cities, smart farms, industrial control, and security systems."
Specifications
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Parameters
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Description
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Master Chip
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ESP32-S3FN8 (Xtensa®32-bit lx7 dual core processor)
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LoRa Node Chip
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SX1262
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USB to Serial Chip
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CP2102
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Frequency
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470~510MHz,
863~928MHz
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Max. TX Power
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21±1dBm
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Max. Receiving sensitivity
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-134dBm@SF12 BW=125KHz
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Wi-Fi
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802.11 b/g/n, up to 150Mbps
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Bluetooth
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Bluetooth 5 (LE)
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Hardware Resource
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7*ADC1 + 2*ADC2;
7*Touch;
3*UART;
2*I2C;
2*SPI; etc.
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Memory
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384KB ROM;
512KB SRAM;
16KB RTC SRAM;
8MB SiP Flash
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Interface
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Type-C USB;
2*1.25 lithium battery interface;
LoRa ANT(IPEX1.0);
2*18*2.54 Header Pin
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Battery
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3.7V lithium battery power supply and charging
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Operating Temperature
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-20 ~ 70 ℃
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Dimensions
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50.2 * 25.5* 10.2 mm
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Main Features
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Microprocessor: ESP32-S3FN8 (Xtensa® 32-bit LX7 dual-core processor, five-stage pipeline rack Structure, frequency up to 240 MHz).
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SX1262 LoRa node chip.
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Type-C USB interface with a complete voltage regulator, ESD protection, short circuit protection, RF shielding, and other protection measures.
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Onboard SH1.25-2 battery interface, integrated lithium battery management system (charge and discharge management, overcharge protection, battery power detection, USB / battery power automatic switching).
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Onboard 0.96-inch 128*64 dot matrix OLED display can be used to display debugging information, battery power, and other information.
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Integrated WiFi, LoRa, Bluetooth three network connections, onboard Wi-Fi, Bluetooth dedicated 2.4GHz metal spring antenna, reserved IPEX (U.FL) interface for LoRa use.
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Integrated CP2102 USB to serial port chip, convenient for program downloading, and debugging information printing.
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Support the Arduino development environment.
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With good RF circuit design and low-power design.
Dimension
Packing list
2*ESP32 lora development board( include antenna
FAQ
1Can the onboard 2.4GHz antenna be replaced?
The 2.4GHz antenna is a spring antenna, and there is no additional interface on the board for
2.4GHz wireless signals.
2Can ESP32’s WiFi and Bluetooth be used at the same time?
No, the WiFi LoRa 32 don’t have an external PSRAM, if your application need use Bluetooth and Wi-Fi at the same time, you can look into this product: Heltec Wireless Bridge.
3What development methods does it support?
4What’s the battery socket type?
5Can I order a version without the OLED display?
6Is V2 code compatible with V3?
7Meshtastic screen has a digital front-end issue?
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