After the PPS pin of the module is connected to the red LED light, it is always on: it is working normally, but it has not been positioned Blinking: the positioning is successful Baud rate, the default baud rate of the module is 9600 The module comes with a ceramic antenna, and there is an IPEX interface to connect other active antennas The module adds a radio frequency amplifier circuit, which is conducive to speeding up the search for satellites The module is compatible with 3.3V/5V level, which is convenient for connecting various single-chip microcomputer systems Color: Material: pc+metal 1. Voltage Input voltage: 3.3-5.5V power consumption Normal mode: 50 mA Power saving mode: 30mA 2. Temperature Working temperature -40Cto+85C Storage temperature -55Cto+100C 3. Pin description and electrical connection module pin VCC: power pin input 3.3-5.5V GND: power ground RXD: Module serial port receiving pin--connect to the serial port TXD of the microcontroller to send TXD: Module serial port sending pin--connect to single chip microcomputer serial port RXD receiving PPS: clock pulse output pin Package Contents: 1 x GPS module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.