How to Access High Precision Position Information from the P78P using Third-Party Software

1. Three ways to get access

i) Directly from the embedded module

Refer to section 5.

ii) Call the APIs for NMEA

Refer to section 6.

iii) Call the APIs for the position information

Refer to section 7.

2. Run the “HPP”  high precision service application

Configure the GNSS module parameters:

Data Source Type: Serial port

Data Source Settings:  ttyMT3, 38400

3. “HPP” Set up

Configuration of the software as shown above.

Device Type: Choose P78.

Protocol Type: The protocol type refers to the data protocol type for the device to access CORS. The software supports two protocols, TCP/IP and Ntrip. It is recommended to choose Ntrip.

NtripAutoStart：

Set to ‘ON’: When the HPP software is running and the high-precision data service is activated, it will automatically connect to the CORS system according to the differential account and provide the high-precision positioning data fixed to the Android location service.

Set to ‘OFF’: When the high-precision data service is activated, the differential account will not be automatically connected, and only the positioning data of the built-in high-precision GNSS module will be provided.

AppAutoStart：

Set to ‘ON’: After the device is turned on, it will automatically load the HPP application and start the high-precision data service.

Set to ‘OFF’: You need to run manually the HPP application, and then start the high-precision data service.

4. NTRIP parameters setup

The first step clicks as shown below to enter the CORS system account configuration interface.

The second step configures CORS account information as shown below.

‘Add’: Add new CORS account

‘Edit’: Edit existing account information

‘Delete’: Delete existing account information

‘Select’: Select existing account information and return to the previous interface

The third step is to update the "MountPoint" as shown below and select the right "MountPoint" to use.

The fourth step, after the set-up is completed, set ‘Connect’ to ‘ON’ to start the high-precision location service.

Note: When ‘NtripAutoStart’ is set to ‘OFF’, HPP will not connect to the CORS service and only provide the positioning data from the built-in high-precision GNSS module to the Android location service interface.

5. Get positioning data directly from the P78P built-in GNSS module

The first step is to confirm that the HPP service software is turned off and the HPP software has exited.

The second step is to set the built-in high-precision data acquisition parameters as follows:

GNSS Data Source Type: Serial port

The number of serial port: ttyMT3

Baud rate: 38400

Note: When using this method, the third-party software needs to obtain the location information of the GNSS module directly from the serial port. If you need to access the CORS system, you need to develop some relevant software yourself to obtain high-precision data.

6. Call the Android location service interface to analyse and use high-precision NMEA data

The first step is to run HPP as described in section 2 and configure the device parameters of the built-in high-precision GNSS module

The second step is to configure CORS account parameters as described in section 4 and set the ‘Connect’ status to ON

The third step is to run third-party software, call the Android location service interface, read and parse the NMEA data by itself to obtain high-precision location data.

Note: If sample codes deeded, please contact the supplier.

7. Call the Android location service interface to directly read high-precision location information

The first step is to change the system's built-in location service provider to HPP

Open the ‘settings’ interface and click on ‘Developer options'.

Set the ‘Select mock location app’ as the ‘HPP’ software as shown in the figure below.

The second step is to run HPP as described in section 2 and configure the device parameters of the built-in high-precision GNSS module

The third step is to configure the general HPP parameters according to actual needs according to the instructions in Section 3, and confirm that the ‘Location Share’ is set to ‘ON’ as shown.