Use ESPrtk as a “Bluetooth to Serial” module.  It will collect (regardless of RTCM / NMEA / RAW / .. data type) from the RX-UART1 port and then send it to the Bluetooth device, or (and) Stream the data received via Bluetooth to the TX-UART2 port.
This function is particularly useful for users who want to collect output data from a GNSS device without having to directly connect to the wire. 


The most famous application when combining Bluetooth for RTK is “NTRIP Client”. This is free android application. The model of this system uses Bluetooth connection between android device (phone) and RTK receiver to receive or send RTCM / NMEA data.

See a tutorial form Skytraq:

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If the RX-UART1 port input is NMEA data, it is possible to use other NMEA viewer applications such as: “GNSS Surveyor”, “Bluetooth GPS”, “Bluetooth GPS Provider” ,”Mapit GIS”,”Bluetooth GPS Status Tool”, “SkyPro GPS Status Tool”…..


To use ESPrtk in this function, After accessing webconfigure and logging in, in action planning, select Data bridge -> Bluetooth Bridge. Click “Save”. A successful save message will appear in the status box submitted below.

Other action.

Besides the main action , ESPrtk can run many other actions at the same time, the supported actions are:

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