A high-sensitivity GPS module built around the MTK3339 chipset, capable of tracking up to 22 satellites on 66 channels with 10 Hz position updates. At just 16 × 16 × 5 mm and under 6 grams, it packs an internal patch antenna, built-in datalogging, and ultra-low power consumption into a tiny footprint.

The module features an external active antenna input that automatically detects and switches to an external antenna when connected. Built-in FLASH datalogging stores up to 16 hours of time, date, position, and altitude data at 15-second intervals — no microcontroller interaction needed after the initial start command.

Key Features

• MTK3339 Chipset – 66-channel, 22-satellite tracking with −165 dBm sensitivity
• 10 Hz Update Rate – High-speed position updates for tracking applications
• Built-In Datalogging – Internal FLASH stores ~16 hours of GPS data (LOCUS)
• Internal Patch Antenna – With automatic switchover to external active antenna
• Ultra Low Power – 20 mA during navigation
• PPS Output – Pulse-per-second signal on GPS fix
• RTC Battery Compatible – Supports backup battery for hot starts

Specifications

• Chipset – MTK3339
• Channels – 66 (22 tracking)
• Sensitivity – −165 dBm (tracking)
• Update Rate – Up to 10 Hz
• Operating Voltage – 3.3V
• Current Draw – 20 mA (navigation)
• Dimensions – 16 × 16 × 5 mm
• Weight – ~6 g

Ideal For

• Custom GPS tracker builds
• Datalogging and asset tracking
• High-altitude balloon projects (tested to ~32 km)
• Low-power portable GPS applications

Package Contents

• 1× GPS Module (MTK3339 chipset)

Resources

• Arduino GPS Library (GitHub)
• Tutorial & Guide