GPS Interface

GPS/GNSS Development Boards
1

Hi,

I am in the process of incorporating a GPS in a project. The GPS output must be interfaced with two different circuits via the serial interface. Can the GPS be coupled to the two circuits directly?

I would actually prefer to isolate the three circuits (GPS, and other two) from each other. What would be a good way to interface the GPS serial output to the input of the other two circuits and keep the circuits isolated from each other?

Charlie W.

2

Yes, you can have the GPS TX line connected to multiple RX lines - I often do this for my development boards so I can sniff the communications between modules and watch them on my laptop.

I suppose you could isolate the signals using a buffer or opto-isolator. Just depends on what you problem you are trying to solve.

3

yes the output tx can be connected to two rx pins, however two tx cannot be conneted to one rx, they would need to be switched