# Heltec Wireless Tracker V2

> ESP32-S3 development board with SX1262 LoRa (28dBm), UC6580 dual-frequency GNSS, 0.96" TFT display, solar charging, and Meshtastic/MeshCore support for GPS tracking and mesh networking.

## Quick Facts

- **Brand:** Heltec Automation
- **Price:** ~$26.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **CPU Architecture:** Xtensa LX7
- **CPU Cores:** 2
- **RAM:** 512KB SRAM
- **PSRAM:** No
- **Flash:** 8MB (Quad SPI)
- **USB:** USB-C 2.0
- **Power:** 5V via USB-C,3.7V LiPo,Solar panel
- **Operating Voltage:** 3.3V
- **Operating Temp:** -20°C to +70°C
- **Dimensions:** 52.00 × 25.40 × 10.26mm
- **Weight:** 55g
- **Battery:** 3.7V Li-ion (connector only)
- **Charging Port:** USB-C
- **Antenna:** IPEX 1.0 (LoRa),LDS built-in (GNSS, WiFi/BLE)
- **SD Card:** No
- **Display:** 0.96" TFT 160×80

## Connectivity

- **Wifi:** 802.11 b/g/n
- **Bluetooth:** BLE 5.0
- **Lora:** SX1262 863-928MHz, 28dBm (KCT8103L PA)

## Use Cases

- asset-tracking
- lora-mesh-networking
- meshtastic-mesh
- gps-tracking
- pet-tracker
- lorawan-node
- gnss-data-logger

## Components

- **ESP32-S3FN8** (mcu): Xtensa LX7 dual-core processor @ 240MHz with 8MB flash, 512KB SRAM, WiFi 802.11 b/g/n, BLE 5.0, and hardware cryptographic acceleration. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- **SX1262** (radio): Semtech SX1262 long-range LoRa transceiver supporting 863-928MHz bands with -134dBm RX sensitivity, paired with KCT8103L PA for 28dBm TX power. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- **UC6580** (gps): Unicore UC6580 GNSS chip with L1+L5 dual-frequency reception, supporting GPS, GLONASS, BDS, Galileo, NAVIC, and QZSS with 96 tracking channels and sub-1.5m accuracy. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fen.unicore.com%2Fuploads%2Ffile%2FUC6580x-00_Datasheet_EN_R1.5.pdf&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- **ST7735S** (display-driver): Sitronix ST7735S TFT-LCD controller driving a 160x80 pixel color display via SPI interface at up to 40MHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.crystalfontz.com%2Fcontrollers%2FSitronix%2FST7735S%2F320%2F&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- **CN3165** (battery-charger): Shanghai Consonance CN3165 linear battery charger IC with up to 1A charge current, solar panel input support, CC/CV/CT charging modes, and thermal regulation up to 130°C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2005251035_ShangHai-Consonance-Elec-CN3165_C559035.pdf&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- **KCT8103L** (rf-front-end): KCT8103L RF front-end module with integrated power amplifier (PA) and low noise amplifier (LNA), boosting LoRa TX power to 28dBm with 21dB LNA gain and 1.9dB noise figure. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ftelectronic.com%2FPublic%2FUpload%2Fnews%2F20250430%2F68121966da4e7.pdf&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)

## Protocols

- **SPI (Display)** (SPI3): CS: GPIO38, SCK: GPIO41, MOSI: GPIO42, DC: GPIO40, RESET: GPIO39
- **SPI (LoRa)**: CS: GPIO8, SCK: GPIO9, MOSI: GPIO10, MISO: GPIO11
- **UART (GPS)** (UART1): TX: GPIO34, RX: GPIO33
- **UART (USB Serial)** (UART0): TX: GPIO43, RX: GPIO44
- **I2C**: SDA: SDA, SCL: SCL
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | USER / PRG Button | — | digital-input, digital-output, pwm, strapping |
| GPIO1 | Battery Voltage ADC | ADC | adc, digital-input, digital-output, rtc |
| GPIO2 | ADC Power Control | — | digital-input, digital-output, adc, touch, rtc |
| GPIO3 | Vext Enable (GPS/Display Power) | — | digital-input, digital-output, adc, touch, rtc |
| GPIO4 | KCT8103L PA CSD (Chip Enable) | — | digital-input, digital-output, adc, touch, rtc |
| GPIO5 | KCT8103L PA CTX (RX Mode Select) | — | digital-input, digital-output, adc, touch, rtc |
| GPIO6 | User GPIO / Header Pin | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO7 | VFEM Power Control (PA LDO) | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO8 | LoRa SX1262 CS | SPI | digital-input, digital-output, touch, pwm |
| GPIO9 | LoRa SPI SCK | SPI | digital-input, digital-output, touch, pwm |
| GPIO10 | LoRa SPI MOSI | SPI | digital-input, digital-output, touch, pwm |
| GPIO11 | LoRa SPI MISO | SPI | digital-input, digital-output, touch, pwm |
| GPIO12 | LoRa SX1262 RESET | — | digital-input, digital-output, touch, pwm |
| GPIO13 | LoRa SX1262 BUSY | — | digital-input, digital-output, touch, pwm |
| GPIO14 | LoRa SX1262 DIO1 (IRQ) | — | digital-input, digital-output, touch, pwm |
| GPIO18 | LED Power | — | digital-input, digital-output, pwm |
| GPIO21 | TFT Backlight Control | — | digital-input, digital-output, pwm |
| GPIO33 | GPS UART RX | UART | digital-input, digital-output, pwm |
| GPIO34 | GPS UART TX | UART | digital-input, digital-output, pwm |
| GPIO35 | GPS Reset | — | digital-input, digital-output, pwm |
| GPIO36 | GPS PPS (Pulse Per Second) | — | digital-input, digital-output, pwm |
| GPIO38 | TFT Display CS | SPI | digital-input, digital-output, pwm |
| GPIO39 | TFT Display RESET | — | digital-input, digital-output, pwm |
| GPIO40 | TFT Display DC | — | digital-input, digital-output, pwm |
| GPIO41 | TFT Display SCK | SPI | digital-input, digital-output, pwm |
| GPIO42 | TFT Display MOSI | SPI | digital-input, digital-output, pwm |
| GPIO43 | USB Serial TX (CP2102) | UART | digital-input, digital-output, pwm |
| GPIO44 | USB Serial RX (CP2102) | UART | digital-input, digital-output, pwm |
| GPIO45 | User GPIO / Header Pin | — | digital-input, digital-output, pwm, strapping |
| GPIO46 | User GPIO / Header Pin | — | digital-input, digital-output, pwm, strapping |

## Accessories

- spring-lora-antenna
- sh1.25-battery-connector
- pin-headers

## Description

## Overview

The Heltec Wireless Tracker V2 is a compact, feature-rich development board designed for GPS tracking and LoRa mesh networking applications. Built around the ESP32-S3FN8 dual-core MCU, it integrates an SX1262 LoRa transceiver with a KCT8103L RF front-end module that delivers up to 28dBm transmit power for extended range, alongside the Unicore UC6580 dual-frequency GNSS receiver supporting GPS, GLONASS, BDS, Galileo, NAVIC, and QZSS constellations with sub-1.5m positioning accuracy.

The board features a 0.96-inch 160x80 TFT display driven by an ST7735S controller, dual SH1.25 connectors for lithium battery and solar panel, and integrated battery management via the CN3165 charger IC with overcharge protection and automatic USB/battery switching. Its LDS antenna design for both GNSS and 2.4GHz WiFi/BLE keeps the physical footprint remarkably small at just 52 x 25.4mm, while an IPEX 1.0 connector provides the option for an external LoRa antenna.

Firmware support is extensive, with official compatibility for Meshtastic, MeshCore, and LoRaWAN, plus full Arduino, ESP-IDF, PlatformIO, and MicroPython development. The board exposes dual 18-pin headers with 7 ADC channels, 7 touch inputs, 3 UARTs, 2 I2C buses, and 2 SPI buses, making it suitable for custom sensor integrations beyond its primary tracking and messaging use cases. Community adoption is strong, with ESPHome configurations available for Home Assistant integration and active Meshtastic firmware support.

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwireless-tracker-v2%2F&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export) — 26.90
- [Amazon UK](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.co.uk%2FHeltec-Wireless-V2-Compatible-Positioning%2Fdp%2FB0GSZN129X&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export) — 36.23

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwireless-tracker-v2%2F&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltec_ESP32&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fopen-source-hardware%2Fesp32-series%2Flora-32%2Fwireless-tracker-v2%2F&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Tracker_V2%2FWireless_Tracker_v2_Datasheet%2FWireless%2520Tracker%2520v2.pdf&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Tracker_V2%2FSchematic%2FHTIT-Tracker_V2.3.pdf&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)

## Images

![Heltec Wireless Tracker V2](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wireless-tracker-v2/2809b6b97393.png)
![Heltec Wireless Tracker V2](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wireless-tracker-v2/999f82698ff9.png)
![Heltec Wireless Tracker V2](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wireless-tracker-v2/ee2110194e29.png)
![Heltec Wireless Tracker V2](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wireless-tracker-v2/b97e6f02f4d2.png)
![Heltec Wireless Tracker V2](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wireless-tracker-v2/8ed03f5ac020.png)
![Heltec Wireless Tracker V2](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wireless-tracker-v2/694757dc6845.png)
![Heltec Wireless Tracker V2](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wireless-tracker-v2/6e2725adc4c7.png)
![Heltec Wireless Tracker V2](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-wireless-tracker-v2/29878730ad3c.png)

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