Has anyone flown a Telemetrum or Telemega before and have the unit go silent (quit sending packets) right at apogee? It was communicating just fine until apogee, then went silent.
Mark
Mark
Version 1.6.8 fixes a TeleMega and TeleMetrum v2.0 bug where the device could stop logging data and transmitting telemetry in flight. All TeleMega v1.0, v2.0 and TeleMetrum v2.0 users should update their flight firmware.
I dont know if the telemetrum V2.0 has a capacitor on board like the Raven 3, to help prevent against a brown out condition. Keep the processor running for several seconds should power be interrupted for any reason.
You need a seriously big cap to keep transmitting for any significant amount of time. I fitted a 1F cap because it is what I have lying around. It would help for momentary dropouts but not much else.
Yes, I've had this occur twice with the TeleMetrum, v1.0 and 1.2 specifically. What hardware and version were you on?
My TeleMetrum 1.0 failure was due to the lipo protection circuit issue that was not very well communicated at the time. Full vehicle loss as a result.
https://altusmetrum.org/Documents/FixBattery/
The TeleMetrum 1.2 issue was a bit more strange. It stopped talking at apogee but both the apogee and main charges fired successfully. I was able to recover the rocket by wandering in the area I suspected it came down until I found it. I'd flown it before and since without issue.
Do you have any further details regarding your issues?
I don't nor have ever owned a TeleMega so I can't pass judgement on them specifically. But I've helped multiple people (THUNDA for instance) with comms issues regarding connecting their TeleMetrums to their Laptops. My solution has always been to shut down everything and try again. It's frustrating that works, but it does.I have not had any anomalous behaviour from the TeleMegas I own.
That's a feature specific to the *Mega family.I do run a separate battery for power and for the eMatches.
After the total loss of my first Blackhawk 38 and TeleMetrum 1.0 I'd have to agree with you there.I would be very wary of protection circuits on LiPos, and have heard of people that have had them trip out and cause problems. That's why I use separate batts for deloyment.
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