Here 2 GPS UART (RS232? TTL?)

Here GPS
1

Hi,

I am using orangecube and HERE2 GNSS.

I have two questions about HERE2 GNSS

  1. It is connected to the gps1 port between here2 and orangecube and is used as a UART communication method. I wonder if the UART communication of HERE2 is RS232 or TTL

  2. I’d like to extend the uart line of HERE2, is there a problem?
    For example, if extend it, the communication is unstable