meshtastic/docs/hardware/devices/heltec/index.mdx

---
id: heltec
title: HELTEC® LoRa 32
sidebar_label: HELTEC® LoRa 32
sidebar_position: 7
---

import Tabs from "@theme/Tabs";
import TabItem from "@theme/TabItem";

<Tabs
groupId="heltec"
queryString="heltec"
defaultValue="v3"
values={[
{label: 'LoRa32 V2.1', value: 'v2.1'},
{label: 'LoRa32 V3', value:'v3'},
{label: 'Wireless Stick Lite V3', value:'Wireless Stick Lite V3'},
{label: 'Wireless Tracker', value: 'tracker'},
{label: 'Wireless Paper', value: 'paper'}
]}>
<TabItem value="v2.1">

:::warning
Not recommended because of design issues! Support is being phased out. Use V3 in new projects.
:::

- **MCU:**
  - ESP32 (WiFi & Bluetooth)
- **LoRa Transceiver:**
  - Semtech SX127x
- **Frequency Options:**
  - 433 MHz
  - 868 MHz
  - 915 MHz
- **Connectors:**
  - Micro USB
  - Antenna:
    - U.FL/IPEX antenna connector for LoRa

## Features

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

## Resources

- Firmware file: `firmware-heltec-v2.1-X.X.X.xxxxxxx.bin`

</TabItem>
<TabItem value="v3">

:::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.
:::

- **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

## Features

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

### Pin Map

![HTIT-WSL_V3_PIN_MAP](</img/hardware/HTIT-WB32LA(F)_V3.png>)

Image Source: [Heltec](<https://resource.heltec.cn/download/WiFi_LoRa32_V3/HTIT-WB32LA(F)_V3.png>)

## Resources

- Firmware file: `firmware-heltec-v3-X.X.X.xxxxxxx.bin`
- Purchase link: [Heltec](https://heltec.org/project/wifi-lora-32-v3/)
- Purchase link: [AliExpress](https://www.aliexpress.us/item/3256805256690400.html)

</TabItem>
<TabItem value="Wireless Stick Lite V3">

:::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.
:::

- **MCU:**
  - ESP32-S3FN8 (WiFi & Bluetooth)
- **LoRa Transceiver:**
  - Semtech SX1262
- **Frequency Options:**
  - 433 - 510 MHz
  - 470 - 510 MHz
  - 863 - 870 MHz
  - 902 - 928 MHz
- **Connectors:**
  - USB-C
  - Antenna:
    - Dedicated 2.4 GHz stamped metal antenna for WiFi/Bluetooth
    - U.FL/IPEX antenna connector for LoRa (next to the V3 icon)

## Features

- No display.
- User and Reset Buttons
- Additional GPIO availability
- No GPS

### Meshtastic I2C Definitions

- SCL: GPIO47
- SDA: GPIO48

### Pin Map

![HTIT-WSL_V3_PIN_MAP](/img/hardware/heltek-wsl-v3.svg)

Image Source: [Heltec](https://resource.heltec.cn/download/Wireless_Stick_Lite_V3/HTIT-WSL_V3.png)

## Resources

- Firmware file: `firmware-heltec-wsl-v3-X.X.X.xxxxxxx.bin`
- Purchase link: [Heltec](https://heltec.org/project/wireless-stick-lite-v2/)
- Purchase link: [AliExpress](https://www.aliexpress.us/item/3256805256996507.html)

</TabItem>
 <TabItem value="tracker">

:::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.
:::

- **MCU:**
  - ESP32-S3FN8 (WiFi & Bluetooth)
- **LoRa Transceiver:**
  - Semtech SX1262
- **Frequency Options:**
  - 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 and GNSS

## Features

- Onboard 0.96-inch LCD display
- User and Reset Buttons

## Flashing the Wireless Tracker

If you are having issues flashing the wireless tracker, especially if it's your first attempt, you may need to manually place the device into Espressif's Firmware Download mode. Please follow the process below to do so.

:::warning

Do not proceed unless an antenna is connected to avoid possible damage to the device's radio.

:::

The following process will manually place the device into the Espressif Firmware Download mode:

1. Unplug the device.
2. Press and hold the USER button.
3. Plug device in.
4. After 2-3 seconds, release the USER button.

With the device now in the Espressif Firmware Download mode, you can proceed with flashing using one of the supported flashing methods. It's generally recommended to use the [Web Flasher](https://flasher.meshtastic.org/). You can select "Heltec Wireless Tracker" from the device drop-down.

## Pin Map

![HT-Tracker_V1 Pin Map](/img/hardware/HT-Tracker_V1_Pin_Map.png)

Image Source: [Heltec](https://heltec.org/project/wireless-tracker/)

## Resources

- Firmware file: `firmware-heltec-wireless-tracker-X.X.X.xxxxxxx.bin`
- Purchase link: [Heltec](https://heltec.org/project/wireless-tracker/)
- Purchase link: [AliExpress](https://www.aliexpress.us/item/3256805495189423.html)

</TabItem>
<TabItem value="paper">

:::caution

Currently the display is only supported in devices labeled v1.1.

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.

:::


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

## Features

- Onboard 2.13-inch black and white E-Ink display screen
- User and Reset switches
- No GPS

## Resources

- Firmware file: `firmware-heltec-wireless-paper-X.X.X.xxxxxxx.bin`
- Purchase link: [Heltec](https://heltec.org/project/wireless-paper/)
- Purchase link: [AliExpress](https://www.aliexpress.us/item/3256805461611876.html)

</TabItem>
</Tabs>