NEO-6M V2 GPS module — u-blox NEO-6M engine, UART, 3.3V–5V, onboard battery backup, patch antenna
The NEO-6M V2 GPS module is built around the u-blox NEO-6M GPS engine (NEO-6M-0-001, ROM 7.0.3), one of the most widely used and well-documented GPS receivers in the maker and embedded systems community. It provides reliable NMEA sentence output over a UART serial interface, making it straightforward to integrate with Arduino, ESP32, STM32, Raspberry Pi, and other microcontroller platforms for GPS-based navigation, tracking, and timing applications.
The V2 module includes an onboard MS621FE-compatible rechargeable backup battery and EEPROM for storing configuration settings, allowing the module to perform a warm or hot start after power cycling — significantly reducing time-to-first-fix (TTFF) in subsequent power-on cycles. A built-in voltage regulator accepts 3.3V to 5V DC input, making it directly compatible with both 3.3V and 5V microcontroller systems without level shifting.
Key Specifications:
- GPS engine: u-blox NEO-6M (NEO-6M-0-001, ROM 7.0.3)
- Interface: UART (TTL serial), default baud rate 9600bps
- Supply voltage: 3.3V – 5V DC (onboard voltage regulator)
- Channels: 50 (u-blox 6 GPS engine)
- Update rate: 1Hz (default), up to 5Hz configurable
- Horizontal position accuracy: 2.5m CEP (typ.)
- Cold start TTFF: ~27s (open sky, typ.)
- Warm/hot start TTFF: significantly faster with battery backup
- Antenna type: external patch antenna (RHCP, SMA/IPEX connector)
- Backup battery: MS621FE-compatible rechargeable cell (onboard)
- Configuration storage: EEPROM (onboard)
- Operating voltage: 3.3V – 5V
Key Features:
- u-blox NEO-6M engine — proven, well-documented GPS receiver with extensive library support
- Onboard backup battery — enables warm/hot start for faster TTFF after power cycling
- EEPROM configuration storage — retains baud rate, update rate, and NMEA sentence settings
- 3.3V–5V compatible — onboard regulator eliminates need for external power conditioning
- UART interface — simple serial connection to any microcontroller UART or SoftwareSerial pin
- Patch antenna included — RHCP patch antenna for reliable satellite acquisition
- Arduino library compatible — works with TinyGPS++ and NeoGPS libraries
Applications:
- Arduino and ESP32 GPS tracking and navigation projects
- Drone and UAV GPS positioning and return-to-home
- Vehicle and asset GPS tracking systems
- GPS-disciplined clock and timing reference
- Geofencing and location-based IoT applications
- Robotics autonomous navigation
Note: Default UART baud rate is 9600bps. Use u-center software (Windows) or the UBX protocol to reconfigure baud rate, update rate, and NMEA sentences. For best performance, place the patch antenna with a clear view of the sky — GPS signals do not penetrate buildings or metal enclosures. The backup battery charges from the module supply and maintains almanac/ephemeris data for faster subsequent fixes.