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heltec-wireless-tracker-docs/docs/wiki/hardware-update-log.md
Ryan Malloy e3642cbc4e Initial commit: Heltec Wireless Tracker documentation site 
Astro/Starlight documentation covering hardware specs, pinout,
schematics, GNSS protocol, LoRa frequencies, and getting started
guides. Includes extracted datasheet images and Docker deployment.
2026-02-21 18:39:46 -07:00

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Wireless Tracker Hardware Update Log

V1.0

Release Date: June 30, 2023

V1.1

Release Date: Late 2023

Changes:

  • Fixed: Power loss issue affecting the GNSS module during LoRa operation
  • Enhanced: Low-power functionality
  • Added: Additional LDO to supply power to the UC6580 GNSS module independently
  • Changed: GNSS control pin removed; GPIO 3 set to HIGH enables GNSS power

Key Differences from V1.0:

Feature V1.0 V1.1
GNSS Power Shared rail Dedicated LDO
GNSS Control N/A GPIO3
Power Isolation Limited Improved
Low Power Mode Basic Enhanced

Documentation:

Hardware Version Detection

To determine your hardware version programmatically:

// V1.1 requires GPIO3 HIGH to enable GNSS
#define GNSS_CTRL_PIN 3

void setup() {
    // For V1.1 hardware - enable GNSS power
    pinMode(GNSS_CTRL_PIN, OUTPUT);
    digitalWrite(GNSS_CTRL_PIN, HIGH);
}