FANTASTIC! Thanks for the prompt response Keith. Can you also confirm if the TeleMetrum v1.2 is/isn't APRS capable? I'd check it myself but I've loaned my TeleMetrum v1.2 to a local AURC University team to give them some homebrew altimeter/tracker ideas. AURC is effectively an IREC equivalent competition down here.
Also, if by chance I'm having telemetry down-link issues (similar to my other thread) via the AltOS proprietary protocol you and Bdale designed is it safe to assume that the APRS transmission is a fully redundant/separate transmission system? Or another way to put it, if I've got APRS enabled and I can't get a telemetry down-link connection working successfully via either AltOS, TeleGPS app, or AltusDroid will the APRS beaconing work fine and the flight get logged locally onto onboard storage (assuming there are no stored flights onboard already) for me to download later? Basically I want to have the option to fall back to APRS for tracking if required and still have the flight fully recorded locally via eeprom if I can't get my live telemetry link working in the field. Thanks again for all of your help. Andrew On Wed, Aug 8, 2018 at 2:30 PM, Keith Packard <[email protected]> wrote: > Plugger Lockett <[email protected]> writes: > > > Hi Keith, > > > > Apologies for spamming the mailing list but I've had some time today to > > look into a few things and that's brought up a couple questions. > > > > Above you mentioned that it's possible to have both APRS and the > telemetry > > digital protocol running concurrently on some systems. After consulting > the > > manual it appears the option is available only on TeleMetrum v2 and > > TeleMega boards. To confirm, the TeleGPS (v1 or v2) aren't capable of > APRS? > > I'd have a look at my TeleGPS v1.0 board but I'm in the office at the > > moment. > > TeleGPS, both v1 and v2, can also send APRS. The only devices which > could not are TeleMetrum v1 boards which used a radio part incapable of > the long transmission times necessary for APRS. > > > In the Altusmetrum manual you mention "a single APRS packet takes nearly > a > > full second to transmit, so enabling this option will prevent sending any > > other telemetry during that time." Given that do you have any > > recommendations regarding transmission frequency? I'd expect once every 5 > > seconds would suffice and still leave a decent chuck of transmission for > in > > flight telemetry. But any advice would be appreciated. > > That's what I use. Note that APRS is sent during ascent, unlike the RDF > beacons which are suppressed during that portion of the flight. > > > Finally, I expect to use my Yaesu VX-8GR for ground station/APRS TNC > > duties. I use it for Big Red Bee comms and it works fine. Given the > > documentation comments on APRS Format I expect to need to enable the > > compressed format as you highlight it as a requirement for comms with the > > newer Yaesu FT1D. But the TeleMega screenshot in the manual doesn't show > a > > line for "APRS Format". Just confirming that if I do have a device > that's > > APRS capable the configuration for the "APRS Format" field would indeed > > reside in the "Configure Altimeter" window. > > Yes, you should see APRS Interval, APRS SSID and APRS format fields in > the 'Configure Altimeter' window. > > Let me know if there's something wrong with the UI in your case; I've > just checked with TeleGPS v1.0 and AltosUI running 1.8.6. > > -- > -keith >
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