The u-blox NEO-M8N is a high-precision, concurrent 72-channel GNSS module supporting GPS/QZSS, GLONASS, Galileo, and BeiDou, offering 2.0m position accuracy. Operating at 3-5V with low power consumption, it is popular for UAVs (like Pixhawk), IoT, and robotic projects, featuring superior sensitivity (–167 dBm), an on-board EEPROM, and PPS output.
 
Key Features & Specifications:
Satellite Systems: Concurrent reception of up to 3 GNSS systems (GPS/QZSS, GLONASS, BeiDou, Galileo-ready).
Accuracy: ~2.0 m CEP (Circular Error Probable).
Sensitivity: Tracking & Nav: –167 dBm, Cold starts: –148 dBm.
Acquisition Time: Cold starts: 26 s; Aided starts: 2 s.
Onboard Components: Often includes an active antenna, EEPROM for saving configuration data, and some variants include a compass (e.g., HMC5883) for flight controllers.
Interface: UART (TTL), supports I2C or USB depending on the breakout board.
Oscillator: TCXO for high stability.
 
Common Applications:
Unmanned Aerial Vehicles (UAVs): Compatible with APM and Pixhawk flight controllers.
Internet of Things (IoT) Devices: Used for tracking and location-based services.
Navigation & Tracking: Ideal for robotics and FPV drones.
 
Usage Notes:
Setup: Requires an open-sky, outdoor area for initial satellite acquisition, which can take time during the first cold start.
Voltage: Typical operating voltage is 3-5V.
Software: Compatible with configuration tools like u-blox u-center.