Editing AndroidAPRS
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[[Category:Spacebridge]] | [[Category:Spacebridge]] | ||
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Spacebridge also uses a Google Nexus One running Android as a tracking computer. We can connect up the headset output of a radio to the microphone input of the G1 in order to receive APRS beacons over RF. | Spacebridge also uses a Google Nexus One running Android as a tracking computer. We can connect up the headset output of a radio to the microphone input of the G1 in order to receive APRS beacons over RF. | ||
There is also an internet APRS infrastructure (APRS-IS). Nodes known as | There is also an internet APRS infrastructure (APRS-IS). Nodes known as "igate"s receive beacons from RF and retransmit them over the internet. Most places in the US have Igate coverage (either directly or via a digipeater), so if you transmit an APRS becaon via RF, most likely an igate will receive the packet and retransmit it over the internet. | ||
One popular website for viewing APRS packets that have made it to APRS-IS is http://aprs.fi/. | One popular website for viewing APRS packets that have made it to APRS-IS is http://aprs.fi/. | ||
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It does not know about all packet formats, but it will get a good portion of the packets received and plot them on the map. | It does not know about all packet formats, but it will get a good portion of the packets received and plot them on the map. | ||
When you're on the settings screen, | When you're on the settings screen, "Automatically beacon" will turn off when you're making changes; you will have to re-enable it after you're done making changes on the setting screen. | ||
The | The "vox delay" is a HDLC NO-OP tone that gets played before the transmitted beacon. (HDLC is the encoding scheme that APRS uses to transmit data). This allows a radio to be configured in VOX mode to start its transmitter after it detects noise, and still transmit the whole packet. Otherwise we would have to activate the push-to-talk (PTT) pin of the radio in order to start transmitting, and the G1 does not have easily accessible GPIO (general purpose IO) pins available. | ||
The AndroidAPRS application was written by Nils McCarthy. It's in alpha test right now, but after further features and polishing it will most likely be released to the Google Android Application Market. | The AndroidAPRS application was written by Nils McCarthy. It's in alpha test right now, but after further features and polishing it will most likely be released to the Google Android Application Market. |