BN 220 has flash to save configuration, so you do not need to reset data next time when you use it
The data output when the TX LED flashing in blue PPS LED not bright when GPS not fixed, flashing in red when fixed
Data Level TTL or RS 232, Default TTL level. To make it be RS232 output, you need to use one TTL to RS232 converter cable
Great Accuracy 2.0 m CEP 2D RMS SBAS Enable Typical Open Sky at Position Horizontal, 0.1m sec 95% SA off at Velocity, 1us synchronized to GPS time at Timing
BN 220 GPS Receiver Module TTL Dual GPS Glonass Navigation w Flash GPS Passive Antenna for Arduino Raspberry Pi Pixhawk F3 CC3D Betaflight F4 Aircraft Flight Control RC FPV Drone