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traccar-test-01 [2019/01/29 13:07] chajh |
traccar-test-01 [2021/04/13 06:54] |
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- | ===== Traccar Client on Old Smartphones ===== | ||
- | Code (Finding ghosts): [[https:// | ||
- | [[traccar-test-01-kr|한국어 문서/ | ||
- | |||
- | ==== Intro ==== | ||
- | We have been studying differences of daily activity between disable people and non-disable. So, we had to gather people' | ||
- | |||
- | Anyway, we adopted Traccar as our GPS tracking platform base, and we'd already tried several experiments. It worked well, but we got a bad news recently. \\ | ||
- | ==== What's the problem? ==== | ||
- | GPS is only available outdoors.((In fact, today' | ||
- | |||
- | Today' | ||
- | So, we got some potential issues: | ||
- | * Most of data doesn' | ||
- | * The tracker device are so varied. It is so hard to comprehend. | ||
- | |||
- | Besides, it is sufficient so that we can get the places our participant visits, although we don't catch actual location where they are in each place. | ||
- | ==== Bad news? ==== | ||
- | While we believe we know the testers' | ||
- | - If any movement was existed in the gap, the data for many hours have been lost. | ||
- | - If not, it's fine. Nothing to do. | ||
- | |||
- | We must look into which was right. | ||
- | ==== Test ==== | ||
- | Unfortunately, | ||
- | |||
- | Test starts: 20190121 | ||
- | ^Name^Phone^OS Ver.^Traccar Ver.^Network^Major problem^ | ||
- | |DBLAB0102|iPhone 6|12.1.2|5.5 (latest in iOS)|Only Wi-Fi (tethered to other phone' | ||
- | |DBLAB0103|Samsung Galaxy S5|6.0.1|5.17 (latest in Android)|Only Wi-Fi (tethered to other phone' | ||
- | |||
- | Both devices have sent location data for a week. | ||
- | To get more information, | ||
- | |||
- | ==== Result and Analysis ==== | ||
- | We configured the client to send its location every 60 seconds. Theoretically, | ||
- | ^ ^ < 2 min ^ 5 ^ 30 ^ 60 ^ 120 ^ 180 ^ 360 ^ > 360 ^ total ^ % of < 2 min ^ | ||
- | ^DBLAB0102| 5045 | 44 | | ||
- | ^DBLAB0103| 8192 | 121 | | ||
- | Although the iPhone(0102)' | ||
- | === Long gaps (> 3 hours) === | ||
- | == Case 1: Low battery and shutting down == | ||
- | Low battery example: \\ | ||
- | ^ ^ < 2 min ^ 5 ^ 30 ^ 60 ^ 120 ^ 180 ^ 360 ^ > 360 ^ total ^ % of < 2 min ^ | ||
- | ^DBLAB0102| 5045 | 44 | | ||
- | ^DBLAB0103| 8192 | 121 | | ||
- | === Case 2: Low battery and energy saving mode === | ||
- | === Case 3: Sleep mode/idle === | ||
- | === Case 4: Process killed by OS === | ||