The NEO-7M GPS module (APM2.5, GYGPSV1) is a versatile and compact GPS module that can be easily integrated into various projects. Here are the technical specifications and features of this GPS module:   Module: NEO-7M APM2.5 GYGPSV1 GPS module Dual Antenna Interface: Supports both internal and external dual antennas for improved position accuracy Compatibility: Arduino and Raspberry Pi compatible, suitable for various development boards Navigation System: Supports GPS (Global Positioning System) and GLONASS (Russian navigation system) Communication Protocol: UART (Universal Asynchronous Receiver-Transmitter) Working Voltage: 3.3V (DC) Serial Communication Baud Rate: 9600 (configurable) Speed Limit: 500m / h Height Restriction: 50000m Channels: 56 channels, GPS L1 (1575.42Mhz) C / A code, SBAS: WAAS / EGNOS / MSAS Positioning Precision: 2.5m CEP (Circular Error Probable, SBAS: 2.0m CEP) Update Rate: Maximum 10Hz (default 1Hz) BaudRate: 9600   This GPS module is designed to provide accurate positioning information for navigation, quadcopter positioning, and other projects where location data is essential. It offers a variety of features to ensure reliable and accurate performance. The UART communication protocol makes it easy to interface with microcontrollers and development boards, and its compatibility with both Arduino and Raspberry Pi adds to its versatility. The dual antenna interface further enhances its accuracy and reliability.