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Jason CisnerosSep 7, 2025
What to do if RS-232 device is not communicating with my Garmin Marine GPS System 500W/GNS 530W?
- MMolly YoungSep 7, 2025
If a RS-232 device is not communicating with the Garmin Marine GPS System 500W/GNS 530W, check the RS-232 port setting for the port that the device is connected to. Verify the configuration of the other device. Verify 500W Series unit RX is connected to remote device TX and 500W Series unit TX is connected to remote device Rx. Verify that there is only one TX source per RX port.