Heltec Wireless Stick Lite V3
Compact ESP32-S3 + SX1262 LoRa development board with WiFi, BLE 5.0, and integrated battery management. Meshtastic and LoRaWAN compatible, with a slim stick form factor ideal for IoT sensor nodes and mesh networking.
$14.90
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Specifications
Components
Espressif ESP32-S3FN8 Xtensa LX7 dual-core processor at 240MHz with 512KB SRAM, 8MB SiP flash, WiFi 802.11 b/g/n, BLE 5.0, hardware crypto acceleration (AES/SHA/RSA/HMAC), 14 touch-sensing IOs, and ULP co-processor for deep sleep wake.
Semtech SX1262 long-range, low-power sub-GHz LoRa transceiver supporting 150-960MHz frequency range with up to +22dBm TX power and -134dBm receiving sensitivity. Supports LoRa and FSK modulation.
Silicon Labs CP2102 USB 2.0 full-speed to UART bridge for firmware programming and serial debug output. Provides reliable serial communication at up to 1Mbps.
Bus Interfaces
GPIO Map
Overview
The Heltec Wireless Stick Lite V3 is a compact, triple-connectivity development board combining an ESP32-S3FN8 microcontroller with a Semtech SX1262 LoRa transceiver. It provides WiFi 802.11 b/g/n, Bluetooth LE 5.0, and long-range LoRa communication in a slim stick form factor measuring just 58 x 23mm. Unlike its sibling the Wireless Stick V3, this "Lite" variant omits the OLED display, making it more power-efficient and cost-effective for embedded deployments where a screen is unnecessary.
The board features an integrated lithium battery management system with charge/discharge control, overcharge protection, and automatic USB/battery power switching via an SH1.25-2 JST connector. A GPIO-controlled 3.3V power rail (Vext) lets you power external sensors on demand and cut power during deep sleep for minimal power consumption (~800uA sleep current). The CP2102 USB-to-UART bridge provides reliable programming and debugging over USB-C.
The Wireless Stick Lite V3 has strong community support as a Meshtastic and LoRaWAN node. It is officially supported by the Heltec ESP32 Arduino framework, PlatformIO, Zephyr RTOS, and ESP-IDF. The board is also compatible with projects like ESP32 Paxcounter, Disaster Radio, and TinyGS satellite ground stations. With its low price, small footprint, and triple wireless connectivity, it serves as an excellent platform for IoT sensor networks, environmental monitoring, off-grid mesh communication, and LoRaWAN deployments.
Use Cases
8LoRa Mesh Networking
Building off-grid mesh communication networks using LoRa radio for text messaging, location sharing, and sensor data relay without cellular or internet infrastructure.
Off-Grid Communication
Text messaging and data exchange in areas without cellular or internet coverage.
LoRaWAN Node
A LoRaWAN end device that transmits sensor data to a LoRaWAN gateway for long-range, low-power IoT applications.
Environmental Monitoring
Monitoring environmental conditions like temperature, humidity, air quality, and weather data using remote sensors.
Field Data Logger
Battery-powered device for recording sensor data, GPS coordinates, and environmental measurements in the field.
TinyGS Ground Station
Running a TinyGS satellite ground station to receive and decode signals from LoRa-based LEO satellites.
Water Quality Monitoring
Monitoring water quality parameters such as pH, conductivity, ORP, and temperature for aquaculture, environmental, or industrial applications.
Disaster Radio
Building disaster communication networks using LoRa mesh for areas without cellular or internet connectivity.
Resources
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