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HELTEC® LoRa 32

V3/V3.1

info

This device may have issues charging a connected battery if utilizing a USB-C to USB-C cable. It's recommended to use a USB-A to USB-C cable.

caution

Be careful when interacting with the USB-C port. This device does not have ESD protection for the CP2102 USB to UART bridge chip.

  • MCU:
    • ESP32-S3FN8 (WiFi & Bluetooth)
  • LoRa Transceiver:
    • Semtech SX1262
  • Frequency Options:
    • 433 MHz
    • 470 - 510 MHz
    • 863 - 870 MHz
    • 902 - 928 MHz
  • Connectors:
    • USB-C
    • Antenna:
      • Dedicated 2.4 GHz metal spring antenna for WiFi/Bluetooth
      • U.FL/IPEX antenna connector for LoRa

V3.1 differences

Firmware remains the same as V3 below. Compare schematics: V3.0 and V3.1. Key differences:

  • Removal of FDG6322C (a dual N & P channel FET) from the V3.1 power supply.
  • Antenna filter values in V3.1 (L11 = 1.8pF, C15 = 2.7nH, C24 = 1.8pF) align more closely with ESP32-S3 reference design than V3.0 (L11 = 1.6nH, C15 = 6.9pF, C24 = 2.4pF).

Features

  • Built in 0.96 inch OLED display
  • User and Reset Buttons
  • No GPS

Meshtastic I2C Definitions

  • SDA: GPIO41
  • SCL: GPIO42

Pin Map

HTIT-V3_PIN_MAP

Image Source: Heltec

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