DWEII ATGM336H GPS+BDS Dual-Mode GNSS Module 2-Pack — Multi-Constellation, Low-Power High-Sensitivity

The DWEII 2 Pack ATGM336H GPS+BDS dual-mode GNSS modules are compact, low-power satellite positioning units that deliver multi-constellation navigation for hobbyist and embedded projects.

These ATGM336H-5N modules integrate a sixth-generation GNSS solution based on the AT6558 SoC to receive Beidou (BDS), GPS, GLONASS, Galileo, QZSS and SBAS corrections simultaneously. Each small-format module offers high sensitivity, low energy draw, and the option to replace common u-blox MAX-series parts, making it suitable for cars, handhelds, wearables and Arduino-based prototypes.

How accurate and sensitive is the ATGM336H for outdoor positioning?

The module combines multi-system tracking channels to improve satellite visibility and fix reliability in open-sky conditions. Typical circular error probable (CEP50) accuracy is around 2.5 meters on open ground, and the chipset supports very low signal capture thresholds for weak-signal environments.

• Positioning accuracy: ~2.5 m (CEP50) in open sky
• Cold start capture sensitivity: around -148 dBm
• Tracking sensitivity: around -162 dBm
• First fix time: roughly 32 seconds under typical conditions

What satellite systems and modes does the module support?

ATGM336H-5N is a true multi-constellation receiver able to work with single-system or combined-system fixes. It supports China’s BDS, US GPS, Russia’s GLONASS, Europe’s Galileo, Japan’s QZSS and augmentation systems like WAAS/EGNOS/GAGAN/MSAS for improved positioning where available.

• Simultaneous reception from six satellite systems
• Multi-system joint positioning for better reliability
• SBAS support for correction data where provided
• Compatible with A-GNSS assistance methods

How does the module fit into embedded projects and Arduino builds?

The module’s compact 9.7 × 10.1 mm class footprint and low operating current make it straightforward to integrate into battery-powered devices and PCB stacks. It exposes standard GNSS outputs and can replace many u-blox MAX-series modules, simplifying retrofit or upgrade workflows in drones, trackers, and DIY navigation projects.

• Low continuous supply current: typically under 25 mA at 3.3V
• Small form factor suitable for embedded boards and wearables
• Built-in antenna detection and short-circuit protection
• Off-the-shelf compatibility with common serial/GNSS interfaces

What electrical and safety features should I expect?

The AT6558-based module focuses on low-power operation while preserving high sensitivity and robust antenna handling. Designers benefit from built-in diagnostics for antenna faults and protection against shorted antenna lines to protect both the module and the RF front-end.

• Built-in antenna detection for connection monitoring
• Antenna short-circuit protection to prevent damage
• 32 tracking channels managed by the GNSS SoC
• Designed for continuous low-power operation in portable devices

Who is this for? The DWEII 2-pack ATGM336H modules are aimed at makers, electronics integrators, and small-scale product developers who need reliable, multi-constellation GNSS positioning without heavy power or space penalties. They work well for Arduino and embedded prototypes, aftermarket navigation upgrades, wearable location features, vehicle tracking installations, and any application where replacing a u-blox MAX-series receiver with a cost-effective, highly capable alternative is desirable.