Peter Hackett <[email protected]> writes: > I was at LDRS32 last weekend and used my TeleMetrum for the first time. WRT > deployment and data logging, it worked flawlessly.
Yay! > However before the flight I tried to do Monitor Idle over the radio > link (while still under the Easy-Up while prepping my rocket) > and I couldn't get it to work. Just to make sure things were working > well enough to fly with it, I plugged into into the computer via > USB and the status was all green. You may actually have had things too close together -- we don't have any automatic transmitter power adjustment stuff working, so if the radio signal is too strong, it's like someone screaming in your ear. Usually 10-12 feet is sufficient, unless the antennas are pointed right at each other. > I turned it off and plugged it into the USB to get it to change > but the orange light didn't light up. I tried various computers > and stand alone USB chargers, but I never saw the charge > light go on. If the battery voltage is too low, the charger won't go into 'fast charge' mode, which is what the light indicates. It's being careful to not make the battery explode... > I did a monitor idle and found that the battery voltage was > "red" (I think around 3.5V) Yeah, that's pretty darn low :-) > Even though the charge light wasn't on, I left it plugged into > a USB cable (while turned off) and checked it every hour or three. > > When on and monitor idle, the battery voltage would read a little > higher each time I checked. Eventually (10 to 12 hours) > it got to ~ 3.7 and I tried to do a radio link ... and it worked jut fine. > (Grr) Sounds like the battery was successfully recharged. Presumably the RF environment at home was enough different that it started working. > Is ~ 4.1V normal? That's a fully charged battery. > And RE the radio link. Any thoughts on why I couldn't get it to > work at LDRS (at Black Rock Nv)? I'd bet you were just too darn close. Hard to know without having been there. > It was hot (up to 114 degrees at LDRS) could this effect > the radio link? I can't think of how it would... -keith
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