# Container Tracking and Smart Boat Demo Apps

**URL:** <https://mangoh.discourse.group/t/container-tracking-and-smart-boat-demo-apps/466>\
**Category:** Uncategorized\
**Created:** [April 8, 2017, 1:12am UTC](https://mangoh.discourse.group/t/container-tracking-and-smart-boat-demo-apps/466 "2017-04-08T01:12:30Z")\
**Posts on this page:** 1\
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**Author:** ![Wavefront\_yk](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/wavefront_yk/32/176_2.png) [@Wavefront\_yk](https://mangoh.discourse.group/u/Wavefront_yk)\
**Post date:** [April 12, 2017, 12:59am UTC](https://mangoh.discourse.group/t/container-tracking-and-smart-boat-demo-apps/466/2 "2017-04-12T00:59:03Z")

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I found some of the answers:

1. here explains about the path:  
[Switching from repo to git submodules](http://mangoh.discourse.group/t/switching-from-repo-to-git-submodules/341/8)

2.gpioExpanderServiceGreen" are the same as “gipoService” and we need both to make things work. Whatever is defined in .sdef needed to install into the board.

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