6 ms·
Months of battery life with gps is impossible. It is 20 hours in gps mode: https://www.findmycat.io/docs/TrackerModes#summary https://www.findmycat.io/docs/Tr
by demondemidi 3y ago
Months of battery life with gps is impossible.
It is 20 hours in gps mode:
https://www.findmycat.io/docs/TrackerModes#summary https://www.findmycat.io/docs/TrackerModes#summary
I have a Jiobit. It starts in ble mode and switches to gps when the cat exits a 30 m radius. It gets about 8 hours of fulll gps gsm battery life once it starts updating every 60 seconds. Normally it is 2 weeks battery life.
Note I take my cat out supervised in a large fenced in yard. He got away from me thrice over seven years. This is just a temporary safety feature now. He’s never ventured more than 100m during his getaways.
- helsinkiandrew 3y ago20 hours for Lost Mode seems much too low. Ideally if away from home for a certain period (or if no motion is detected - I'm not sure if the device has the technology) it should go into sending out position every hour rather than 30s so it can last indefinitely - days/weeks atleast (like some vehicle trackers do)
- gitgud 3y ago> Months of battery life with gps is impossible. Apple air tags last for 12 months apparently https://www.tile.com/en-au/blog/airtag-battery-life# https://www.tile.com/en-au/blog/airtag-battery-life#
- wccrawford 3y agoThey aren't GPS. They rely on a proprietary network of devices from one of the biggest tech giants in the world.
- rplnt 3y agoThat's why Apple makes it so damn hard (compared to any Android I've ever owned) to turn off Location, Bluetooth (and maybe WiFi) on their mobile devices.
- binarymax 3y agoDisabling location is annoying yes (a couple levels deep in the settings) - but disabling bluetooth and wifi is at the top level and very easy to do.
- hackmiester 3y agoI definitely think it’s inexcusable that the control center buttons are so misleading, but at least “Hey Siri, turn off Bluetooth” (or Wi-Fi) really does it.
- rodorgas 3y agoSince iOS 11, turning Bluetooth off from the control center only puts Bluetooth on a timeout until the next morning instead of disabling it permanently, as one would expect. Even when it’s off, the antenna stays on, looking for new devices. You can turn it all the way off by digging into the settings menu, but as soon as you turn it on for any reason, the cycle starts again.
- enraged_camel 3y agoI personally really like this, because 95% of the time when I turn off my Bluetooth what I’m really wanting to do is put it on pause. The times when I want to turn it off completely, I also want to turn off everything else (Wi-Fi etc.) so airplane mode (which does not time out) works great.
- joshspankit 3y agoSimilar to what rodorgas said about bluetooth, when you disable WiFi it’s normally “stop connecting to (currently) nearby wifi until tomorrow”. The radio doesn’t turn off and it still actively scans for other wifi to connect to (will connect 5min later at your friend’s house, for example).
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- h1fra 3y agoI don't know much about GPS, but I always assumed it was a passive tech. What is consuming battery in that case?
- krisoft 3y agoIt is a lot of work to acquire and track the signals and this is often implemented in software. And then afterwards it takes a lot of work to calculate the navigational solution from these raw measurements. This basically keeps a microprocessor busy which uses energy. One trick people do for ultra-low energy non-realtime GPS tracking of wildlife is to store the “raw” radio samples and do as little processing on the tracking device as possible.[1] Then once the tracker gets back they batch process all the samples recorded and reconstruct where the animal has been. That is obviously a tradeoff of more storage used for less energy consumption. Obviously that trick does not work if you want to know where the animal is live, it can only tell you where it has been once you have processed the data. 1: https://arxiv.org/abs/2207.06310 https://arxiv.org/abs/2207.06310
- h1fra 3y agoAh I see, the continuous tracking is the culprit here. Thanks
- joshspankit 3y agoAre there no hobby-level GPS chips that do hardware decoding?
- krisoft 3y agoWhat do you mean by "hardware decoding"? There are custom chips which do the whole GNSS business. So they are doing "hardware decoding", the chip is the hardware. I'm not aware of how all of them are implemented internally, but my understanding is that the acquisition&tracking of signals usually happens in the digital domain. Can be wrong on that of course.
- 3y ago
- paxys 3y agoIt is not impossible if the GPS is off by default. Battery life is 20 hours only in "lost mode", aka when the location is being updated every 30 seconds. If you don't need that, and are okay with updates on demand, it can last a year.
- demondemidi 3y agoObviously.
- wussboy 3y agoIt wasn’t obvious to me.
- demondemidi 3y agoI posted the table that literally said exactly OPs comment. It clear you commented without reading, which violates the good-faith covenant of this website.
- 0xFF0123 3y agoThis was unnecessarily snarky in an otherwise insightful discussion.
- demondemidi 3y agoI posted the table that literally said exactly OPs comment. I have little patience for people that can’t be bothered to read yet still voice their opinions. They do not belong here.