Post AyYbwM4ILUXcvCckee by DG1JAN@radiosocial.de
 (DIR) More posts by DG1JAN@radiosocial.de
 (DIR) Post #AyYCWia7WOJIMWBlUO by foone@digipres.club
       2025-09-25T02:28:51Z
       
       0 likes, 0 repeats
       
       Someone should hurry up and invent micro-GPS. I want to be able to have objects inside my house determine their position on a centimeter scale. basically I want cheap and easy Differential GPS
       
 (DIR) Post #AyYCv6MwjQAz5VeasC by A_C_McGregor@topspicy.social
       2025-09-25T02:33:17Z
       
       0 likes, 0 repeats
       
       @foone NGL, that sounds like the kind of thing *you* would invent
       
 (DIR) Post #AyYDDLXh3XnFMMNe9A by tshirtman@mas.to
       2025-09-25T02:36:35Z
       
       0 likes, 0 repeats
       
       @foone wouldn’t BLE signal triangulation get us there? you’d need a few fixed points to triangulate from, but i agree it could be worth the trouble.
       
 (DIR) Post #AyYDGlUr11UMiwgN9c by tevruden@nonexiste.net
       2025-09-25T02:37:13Z
       
       0 likes, 0 repeats
       
       @foone I want this because I will put something down and it will DISAPPEAR.
       
 (DIR) Post #AyYDgvilckNjxnfO1w by burnitdown@beige.party
       2025-09-25T02:41:57Z
       
       0 likes, 0 repeats
       
       @foone GPS is a sattelite system, so it's probably easier to do it with frikken lazer beams.
       
 (DIR) Post #AyYDk7105b1LrOiEIi by foone@digipres.club
       2025-09-25T02:42:18Z
       
       0 likes, 0 repeats
       
       @tshirtman maybe! I've not looked into it. Thanks for the pointer
       
 (DIR) Post #AyYGh3QLHiVfiRncSu by yuki2501@masto.hackers.town
       2025-09-25T03:15:33Z
       
       0 likes, 0 repeats
       
       @foone Related: A sock-stuck-in-drier detector. Those pesky bastards keep disappearing whenever they feel like it.
       
 (DIR) Post #AyYHjMZPAdlTd7hecq by artemist@social.mildlyfunctional.gay
       2025-09-25T03:27:07Z
       
       0 likes, 0 repeats
       
       @foone There are a few standards for this, though I'm having trouble finding good data on accuracy, other than "sub-meter". the systems i've seen deployed tend to be BLE with range based on RSSI, which is not particularly accurate.BLE 5.1 has a standard for measuring angle of attack with an antenna array, which can work for positioning. There's also "UWB" which can do angle of attack and time of flight ranging, but every time i try to figure out how to use it i get confused by all the competing standards and give up.i also can't find any great data for accuracy of any of the systems.
       
 (DIR) Post #AyYKHMNOb4lomdQNvs by tshirtman@mas.to
       2025-09-25T03:55:45Z
       
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       @foone i might have been a bit optimistic on this one, from a quick search 🥲 Many have had that idea, and ran into difficulties.
       
 (DIR) Post #AyYNEubjAa1zwXeWDA by Archivist@social.linux.pizza
       2025-09-25T04:29:20Z
       
       0 likes, 0 repeats
       
       @foone if you can find some cheap radio emitters with a steady and accurate frequency, you can make some sort of differential timing detection system by comparing where in the wave form you are for 3 sources, and use that to determine a location in 3D. I have seen that with robots, and accuracy is sub centimeter
       
 (DIR) Post #AyYNeK1NopOI0ClkMi by Archivist@social.linux.pizza
       2025-09-25T04:33:59Z
       
       0 likes, 0 repeats
       
       @tshirtman @foone it is very hard to implement with BLE. The 2.4GHz band has too high a frequency for a simple detection. It is easier to imitate a plane's ILS with 3 low frequency locators
       
 (DIR) Post #AyYbwM4ILUXcvCckee by DG1JAN@radiosocial.de
       2025-09-25T07:13:31Z
       
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       @foone so you want BLE or UBW ranging?