Commonly used map programs include Khalid, Daodaotong and Gaode. Whichever one you want. But now there is a problem that you can't know the COM port and baud rate of this navigation hardware, so you can only try one by one.
Use map com port modification software, set the baud rate of map to 9600, and set com ports to com 1, com2 and com3 respectively. Note: 9600 and com2 have the most settings, so you can set them first. Plug in the map and try it on the navigation machine to see if you can receive the stars (com port can't receive the stars by mistake). If not, switch to another com port. Baud rate is generally not wrong, and 9600 has a wide compatibility range.