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  4. WiFi LoRa 32(V3), ESP32S3 + SX1262 LoRa Node, Meshtastic and LoRaWAN Compatible

Summary

WiFi LoRa 32 is a classic IoT dev-board designed & produced by Heltec Automation. Since its launch in 2017, it has been loved by developers and makers. The newly launched V3 version has the same pin sequence as the V2 version and retains Wi-Fi, BLE, LoRa, OLED display, and other functions.

It is the best option for smart cities, farms, homes, industrial control, house security, wireless meter reading, and IoT developers.

Main Features

  • Microprocessor: ESP32-S3FN8 (Xtensa® 32-bit LX7 dual-core processor, five-stage pipeline rack Structure, frequency up to 240 MHz).
  • SX1262 LoRa node chip.
  • Type-C USB interface with a complete voltage regulator, ESD protection, short circuit protection, RF shielding, and other protection measures.
  • 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).
  • Onboard 0.96-inch 128*64 dot matrix OLED display can be used to display debugging information, battery power, and other information.
  • 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.
  • Integrated CP2102 USB to serial port chip, convenient for program downloading, and debugging information printing.
  • Support the Arduino development environment.
  • With good RF circuit design and low-power design.

Specifications

ParametersDescription
Parameters Master ChipDescription ESP32-S3FN8 (Xtensa®32-bit lx7 dual core processor)
Parameters LoRa Node ChipDescription SX1262
Parameters USB to Serial Chip Description CP2102
Parameters FrequencyDescription 470~510MHz,
863~928MHz
Parameters Max. TX PowerDescription 21±1dBm
Parameters Max. Receiving sensitivityDescription -134dBm@SF12 BW=125KHz
Parameters Wi-FiDescription 802.11 b/g/n, up to 150Mbps
Parameters BluetoothDescription Bluetooth 5 (LE)
Parameters Hardware Resource Description 7*ADC1 + 2*ADC2;
7*Touch;
3*UART;
2*I2C;
2*SPI; etc.
Parameters MemoryDescription 384KB ROM;
512KB SRAM;
16KB RTC SRAM;
8MB SiP Flash
Parameters InterfaceDescription Type-C USB;
2*1.25 lithium battery interface;
LoRa ANT(IPEX1.0);
2*18*2.54 Header Pin
Parameters Battery Description 3.7V lithium battery power supply and charging
Parameters Operating Temperature Description -20 ~ 70 ℃
Parameters Dimensions Description 50.2 * 25.5* 10.2 mm

Description

Pin Map

High light

Onboard OLED Display

The integrated OLED display can be used to show some information such as system status and parameters, making it convenient for users to directly use the entire development board for their own product design.

USB Type C

The power supply, firmware download, and debugging interfaces adopt a more universal USB Type C interface, making development work more convenient.

Plastic Shell

We also made a plastic shell as an optional accessory. Which provide basic protection for the development board.

Onboard OLED Display

The integrated OLED display can be used to show some information such as system status and parameters, making it convenient for users to directly use the entire development board for their own product design.

USB Type C

The power supply, firmware download, and debugging interfaces adopt a more universal USB Type C interface, making development work more convenient.

FAQ

The 2.4GHz antenna is a spring antenna, and there is no additional interface on the board for 2.4GHz wireless signals.

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.

  • 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.

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

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

No, the MCU is different.

It’s caused by the meshtastic setting. Changing the default screen to SSD1306 can solve the problem.

The specific steps are as follows:

“Radio configuration”→”Display”→”Override OLED auto-detect”→”SSD1306”

Docs & Resource

Project

Packing list

The default packing list without selecting any accessories is as follows:

ItemQuantity
Item WiFi LoRa 32 (V3)Quantity x1
Item LoRa AntennaQuantity x1
Item SH1.25×2 Battery ConnectorQuantity x1
Item 2.54*18 Header Pin Quantity x2

WiFi LoRa 32(V3), ESP32S3 + SX1262 LoRa Node, Meshtastic and LoRaWAN Compatible

$17.90 – $19.90

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