GPS module This BN-220 GPS Module features the latest 10th generation chip and requires no driver for use. For connection with RPi, connect red to 3.3V, black to GND, green to TXD, and white to RXD. The flashing TX LED indicates normal GPS module output. A flashing LED indicates the GPS module has acquired location. Data level: TTL or RS232, default is TTL level. For RS232 output, a TTL to RS232 converter cable is required. The BN-220 GPS Module includes 4MB flash memory to save configuration, eliminating the need to reset data on subsequent uses. Baud rate: 4800bps to 921600bps, default 38400bps. Material: Metal Color: As shown Package Contents: 1 x module 1 x link cable Only the above package content is included; other items are not part of this package. Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3cm.