HELTEC® LoRa 32
- LoRa32 V2.1
- LoRa32 V3/V3.1
- Wireless Stick Lite V3
- Wireless Tracker
- Wireless Paper v1.0
- Wireless Paper v1.1
V2.1
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
V3/V3.1
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:
- 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
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Image Source: Heltec
Resources
- Firmware file:
firmware-heltec-v3-X.X.X.xxxxxxx.bin - Purchase links
Wireless Stick Lite V3
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
- SDA: GPIO41
- SCL: GPIO42
Pin Map
Image Source: Heltec
Resources
- Firmware file:
firmware-heltec-wsl-v3-X.X.X.xxxxxxx.bin - Purchase Links:
- International
Wireless Tracker
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
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.
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:
- Unplug the device.
- Press and hold the USER button.
- Plug device in.
- 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. You can select "Heltec Wireless Tracker" from the device drop-down.
Pin Map
Image Source: Heltec
Resources
- Firmware file:
firmware-heltec-wireless-tracker-X.X.X.xxxxxxx.bin - Purchase Links:
- International
Wireless Paper V1.0
The Wireless Paper V1.0 is listed as "Wireless Paper V1.0" in the firmware files and on the web flasher.
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:
- 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-v1_0-X.X.X.xxxxxxx.bin - Purchase Links:
- International
Wireless Paper V1.1
The Wireless Paper V1.1 is listed as "Wireless Paper" in the firmware files and on the web flasher.
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:
- 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 Links:
- International