GNSS Master app allows you to:
1) Connect to your external GNSS receiver via USB Serial (OTG) Bluetooth BLE and TCP/IP
2) Send corrections to your GNSS receiver from in-built NTRIP Client (V1 & V2) and PointPerfect
3) Output your GNSS receiver data to NTRIP Server (V1/V2) TCP Client or TCP Server
4) Use high accuracy position from your receiver directly with SW Maps and with all other Android apps via Mock Location
5) Change your u-blox/Septentrio receiver configuration to Rover Base or load any custom configuration file