Gnat LoRa+GNSS Asset Tracker
Ultra-small (20x20mm), ultra-low-power LoRa/LoRaWAN + concurrent GNSS asset tracker by Tlera Corp, built on the Murata CMWX1ZZABZ-078 module with STM32L082 MCU, SX1276 LoRa radio, u-blox MAX-M8Q GNSS, and LIS2DW12 accelerometer.
$79.95
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Specifications
Components
Murata Type ABZ module integrating STM32L082 ARM Cortex-M0+ MCU and Semtech SX1276 LoRa transceiver in a 12.5 x 11.6mm package, supporting all major LoRaWAN frequency bands.
ST ultra-low-power MCU with 192KB flash, 20KB SRAM, AES-128/256 hardware crypto engine, and deep-sleep current under 1µA. Runs at up to 32MHz.
Semtech SX1276 LoRa transceiver supporting FSK, GFSK, and LoRa modulation across 868/915MHz bands with up to +20dBm output power and -148dBm sensitivity.
u-blox MAX-M8Q concurrent GNSS receiver supporting GPS, GLONASS, Galileo, and BeiDou simultaneously with -167dBm navigation sensitivity and PPS output.
ST LIS2DW12 ultra-low-power MEMS accelerometer with ±2g/±4g/±8g/±16g selectable ranges, wake-on-motion interrupts, and 1.5µA current in low-power mode for motion detection.
Texas Instruments TPS7A02 LDO voltage regulator with only 25nA quiescent current, providing dedicated 3.1V supply for the MAX-M8Q GNSS receiver.
Bus Interfaces
GPIO Map
Overview
The Gnat is an ultra-small (20mm x 20mm), ultra-light (2.8g) LoRa+GNSS asset tracker designed by Tlera Corp for long-term, battery-powered location tracking. Built around the Murata CMWX1ZZABZ-078 system-on-module, it integrates an STM32L082 ARM Cortex-M0+ MCU and Semtech SX1276 LoRa transceiver in a single package, paired with a u-blox MAX-M8Q concurrent multi-constellation GNSS receiver supporting GPS, GLONASS, Galileo, and BeiDou simultaneously.
Power efficiency is the Gnat's defining feature. With a total sleep current of just 2.5 microamps (including the LIS2DW12 accelerometer continuously monitoring for motion), the board can run for over 10 years on a single 3.6V 2400mAh LiSOCl2 battery when configured for one GNSS fix per day. The onboard LIS2DW12 accelerometer enables intelligent wake-on-motion and sleep-on-no-motion behavior, so the tracker only activates when the asset actually moves.
The Gnat supports LoRaWAN connectivity across all major frequency bands (AS923, AU915, EU868, IN865, KR920, US915) and can be programmed via the Arduino IDE using the GrumpyOldPizza STM32L0 Arduino core, or via Rust using the embedded-hal ecosystem. It exposes multiple UART, I2C, SPI, ADC, DAC, and PWM interfaces through castellated edge pads, making it suitable for integration into custom enclosures and carrier boards for vehicle tracking, wildlife monitoring, agricultural sensing, and other remote IoT applications.
Use Cases
8Asset Tracking
Tracking the location and status of physical assets like vehicles, packages, and equipment.
Vehicle Tracking
Real-time GPS vehicle tracking with cellular data transmission for fleet and asset management.
Pet Tracker
GPS-based tracker for monitoring the location and movement of pets, attached to a collar.
Wildlife Tracking
Tracking the location and movement of wildlife, livestock, or pets using GNSS and long-range wireless communication.
GNSS Data Logger
Log GPS/GNSS location data with timestamps for route tracking, fleet management, and geofencing.
LoRa IoT
IoT applications using LoRa radio for long-range, low-power sensor connectivity.
Battery Powered Sensor Node
Low-power sensor nodes running on battery for wireless data collection and monitoring.
Remote Sensor Nodes
Deploy wireless sensor nodes in remote locations using LoRa, NB-IoT, or cellular connectivity.
Resources
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