08 octombrie 2024

Heltec V3 versus LilyGo LoRa T V2 comparision table

These are two LoRa development boards and both are good for Meshtastic networks.

 

LilyGo:

Heltec T3 V2:

 

Key Takeaways

  • Heltec V3 is a better choice if you need better power efficiency and are working on battery-powered IoT applications because the SX1262 LoRa chip consumes less power than the SX1276.
  • LilyGO LoRa32 V2.1 is a good option for projects that don’t need extreme power efficiency but want to use a well-supported and reliable LoRa chip like the SX1276.
  • Both boards offer similar OLED display capabilities using I2C, but the GPIO pin assignments differ, so check compatibility when switching between them.

 

A very quick reference chart for two LoRa modules, the Heltec V2 and LilyGo T V2 (T is with the OLED already mounted).

Feature Heltec V3 LilyGO LoRa32 V2.1
Microcontroller ESP32 (dual-core, 240 MHz) ESP32 (dual-core, 240 MHz)
Flash Memory 8MB 4MB
OLED Display Yes (0.96 inch, 128x64 pixels, I2C) Yes (0.96 inch, 128x64 pixels, I2C)
OLED SDA (I2C) GPIO 4 GPIO 21
OLED SCL (I2C) GPIO 15 GPIO 22
LoRa Chip SX1262 SX1276
LoRa Frequency Bands 868MHz / 915MHz 868MHz / 915MHz
LoRa SPI MISO GPIO 19 GPIO 19
LoRa SPI MOSI GPIO 27 GPIO 27
LoRa SPI SCK GPIO 5 GPIO 5
LoRa SPI CS GPIO 18 GPIO 18
LoRa RESET GPIO 14 GPIO 23
LoRa DIO0 GPIO 26 GPIO 26
LoRa DIO1 GPIO 35 GPIO 33
Power Management Better low-power modes with SX1262 Good, but SX1276 consumes more power
Antenna U.FL connector for external antenna Spring-type antenna (can be replaced)

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