doc:appunti:hardware:gps_logger_i_blue_747
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doc:appunti:hardware:gps_logger_i_blue_747 [2010/04/03 09:45] – niccolo | doc:appunti:hardware:gps_logger_i_blue_747 [2019/10/11 15:47] (current) – [Week Rollover Bug] niccolo | ||
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====== MTKBabel ====== | ====== MTKBabel ====== | ||
- | :!: **NEW!** | + | MTKBabel is hosted on **[[https:// |
**MTKBabel** is a Perl program to operate the **i-Blue 747 GPS data logger**. It should work also with other GPS devices based on the **MediaTek MTK** chipset. Starting with version **0.7** it offers also support for the **Holux M-241** data logger. It is free software released under the GPL license. | **MTKBabel** is a Perl program to operate the **i-Blue 747 GPS data logger**. It should work also with other GPS devices based on the **MediaTek MTK** chipset. Starting with version **0.7** it offers also support for the **Holux M-241** data logger. It is free software released under the GPL license. | ||
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If you encounter some problems, please run the program with the '' | If you encounter some problems, please run the program with the '' | ||
- | ==== Credits ==== | + | ===== Weeks Rollover Bug ===== |
+ | |||
+ | It turned out that several GPS based on the MTK chipset are affected by a **Weeks Rollover Bug**. You discover that your device is affected by the bug because the GPX files you save from it, will have a **timestamp badly in the past**. | ||
+ | |||
+ | Actually I have two i-Blue 747 GPS data loggers. The older one is a **Model ID 001B**, which has already manifested the problem: today is **2019-10-10**, | ||
+ | |||
+ | The other logger of mine is a **Model ID 001D**, which instead is still recording correct timestamps today. I suspect that the weeks counter is nevertheless 10 bits, and just the hard-coded EPOCH is more recent. So the bug is **just to come in the near future**. | ||
+ | |||
+ | * **[[https:// | ||
+ | * **[[https:// | ||
+ | ===== Credits | ||
I wish to thank all the people behind the **[[http:// | I wish to thank all the people behind the **[[http:// |
doc/appunti/hardware/gps_logger_i_blue_747.txt · Last modified: 2019/10/11 15:47 by niccolo