Editing AndroidAPRS
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AndroidAPRS is an Google Android application for doing APRS. Here is a little about how it works; if you have further questions, contact nils. | AndroidAPRS is an Google Android application for doing APRS. Here is a little about how it works; if you have further questions, contact nils. | ||
Its features are: | Its features are: | ||
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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. | 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. | ||
With an external radio and a phone of adequate processing power, this application can receive beacons over RF, decode them, and plot them on the map. That allows us to track balloons to figure out where they're going so we can retrieve them. | |||
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 "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. | ||
Spacebridge uses the Google G1 running Android as a flight computer on balloons. Thus we can connect up the headset output of the G1 to a radio in order to transmit APRS beacons. | |||
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. |