Here3+ ublox pinmap

Here GPS
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We purchased and use here3+.
I would like to receive only the L1 band of GPS signals through gnss configuration settings in u-center.
For this purpose, we would like to connect between here3+ and u-center through USB to TTL small board.
For this purpose, I would like to ask how to connect u-center.
Additionally, I would like to ask about the pin map of the UART port in the middle of the two CAN communication ports on the here3+ internal board.

Thank you for your consideration.
Best regards,
Min Jae Kim

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please answer me as soon as possible.

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Looks like the pinouts are not published anywhere. It should contain GPS UART, compass I2C and few auxiliary GPS pinouts.
You can remove shielding and do a continuity check for find out.

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@Minjae please refer to this file as a reference for pinouts for Here3+ GNSSPeriph-release/Here3+/hwdef.dat at release · CubePilot/GNSSPeriph-release · GitHub . Also note that the same project can be modified and used as you need.

With latest release Release v1.14.4 · CubePilot/GNSSPeriph-release · GitHub from the project you can connect to u-blox module present inside Here3+. Use mission planner to update firmware, Here 4 Manual | CubePilot . Select no to “Do you want to search the internet for firmware?” and manually select the Here3+_FW.bin file in the GNSSPeriph.zip.

Follow the steps on how to connect U-blox module here: Here 4 Manual | CubePilot . Ignore the steps on update ublox firmware.

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@sidbh