My friend Ari OH2BSF built his version using Raspberry Pi instead of a laptop. Othervise the setup is the same than described in the previous posts, soundmodem as TNC and xastir as APRS client.
Hugo XE1BEP has built a similar system, and he has also written an excellent document how to turn a Raspberry Pi into an iGate using xastir and soundmodem. His version includes the instructions how to connect a serial GPS into the system. Here is the link to his document:
It’s been a while since the last update. Let’s wrap this topic up by going through the final set-up for the minimum hardware (= soundmodem based) iGate.
Part 1 lists all the needed building blocks for the iGate. PC, linux/ubuntu operating system, soundmodem software, xastir software (aprs client), internet connection, 2m FM radio (only RX is needed for iGate) and an audio (stereo) cable with 3,5 stereo plugs are needed.
Part 2 shows how to configure the xastir for the connection to APRS-IS server. In this case there is no GPS, but your station location is entered as part of the station configuration. This makes sense for a fixed station, especially for an iGate.
Part 3 shows how to configure the soundmodem. When this is done it might be a good idea to test that the soundmodem works properly. This can be done with the soundmodemconfig’s Diagnostics functionality.