SP047. 2019-08-31

Table of contents

Backlog Priority

[Subscriptions-1.1, Bug] Error sometimes when adding subscriptions users to subscription

Improved error message for when wrong parameters are sent for creating a subscriptions user.


[Curriculum-1.0] Create lesson 4 of level C1

Lesson 4 is improved in level C1.

The lesson teaches about reflected light intensity option for the color sensor. The students build their own robot so that it can follow a line. The lesson is still only in Bulgarian, but it will be translated soon.

Electric Car

[Curriculum-1.0] Create lesson 5 of level C1

Lesson 5 is improved in level C1.

The lesson teaches about three or more state line following. The students build a boat robot so that it can follow a line. The lesson is still only in Bulgarian, but it will be translated soon.


[Curriculum-1.0] Create lesson 7 of level C1

Lesson 7 is improved in level C1.

This is the last lesson of the level and it is made so that the students have more fun. The students build a motorcycle robot and make a competition around a track for the fastest robot. The lesson is still only in Bulgarian, but it will be translated soon.


[FLL-7.0] General communication on the FLL-7.0 competition review with the community

For the last weeks we've done a lot for the popularization of the course Solutions and Review for FIRST LEGO League 2018-2019 Into Orbit Challenge.

We've published a new Playlist in FLLCasts YouTube channel - with all the previews of the video tutorials. You can check the playlist here:


We've published two articles about the course - https://tmblr.co/ZDe0Tr2iXDmuG and https://tmblr.co/ZDe0Tr2iJdTvz

We've made a lot of posts in Facebook and Twitter - videos, pictures and links.

https://www.facebook.com/fllcasts/ https://twitter.com/fllcasts


[AI3D-1.0] Upgrade 3dassemblyinstructions.com to IS-5.0.1 and show an animation material

The material is publish on 3dassemblyinstructions



[AI3D-1.0] Publish Animations and notes tutorial

Tutorial is published at


It shows notes on the different steps on what is happening and is like a tutorial for the end user, but could be used as instructions while assembling.

Assembly instruction GLTF animation 3D on the web

[Bug] See why a subscription user can't be created if the user is invalid and if we want it like that

Concluded that this is only a symptom of a larger problem - that there are invalid users in the database, which will be fixed in a different card.

[Bug] See why there are users with invalid usernames

No apparent cause could be found. Most likely they were leftovers from incomplete migration of usernames.

[Groups-1.0] How to start classes after a user has Manually Enrolled in the group

A few processes were discussed in the team and cleared. One: We as academy coordinators, add students in the academy subscription so that they have access once they have paid the registration fee.

Two: We as academy coordinators send instructional email to parents in the group how to enter in the course and the in lesson. That email links this tutorial Parental instructions to prepare students for their first lesson in the Academy The tutorial also troubleshoots the possibility of forgotten password and how to recover it.

Parent and child image

[Platform] Make notifications for coordinators that there has been some movement in their groups

When a group is opened for Manual Group Enrollment (MGE), the istructors and coordinators in it now get a notification whenever a user enrolls himself, so that they have a better understanding of the student flow in their groups.

example notifications

[Subscriptions-1.1] Automatically add the user as a user and an owner when he buys the subscription

When a user buys a subscription, he automatically gets added to the subscription as both an owner AND a user of the subscription. That way, the user can get straight to using the subscription.

The only exception for this is when a subscription is a School Student subscription where you would want to add only your students.

[Subscriptions-1.1] Subscribe button opening in new tab

When on the /subscriptions/show page and you press 'Subscribe', but are not logged in, you used to get a new tab where you would sign in. This is now done in the same browser tab. When you sign in, you will be redirected back to the subscriptions page.

[Subscriptions-1.1] You are currently subscribed.

Messages on /subscriptions/:id/show for what the state of your subscription is have been improved.

[Subscriptions-1.1, Bug] Fix subscriptions appearing twice on the subscriptions index if you are part of them twice

On the subscriptions index (/subscriptions), subscriptions no longer appear twice sometimes.

[Subscriptions-1.1, Bug] Adding owner to a completely empty subscription shows an error message that the subscription must always have an owner and adds him anyway.

Fixed a bug where adding an owner to an empty subscription showed an error although the operation was successful.


[Curriculim-1.0] Create a sumo arena for printing.

Tutorial: https://www.fllcasts.com/bg/tutorials/1399-?ref=7242 has the image and link to the new field.

Sumo mat


There is a new tag:


[Curriculum-1.0] Create renders for backwheels of different robots


Back Wheel 1

Back Wheel 2

Back Wheel 3

Back Wheel 4

[Image] Update images from tutorials for 3 state line following

The image in https://fllcasts.com/bg/tutorials/893-three-or-more-state-programs is reworked.


[Image] Add image to introduction in level C1 lesson 7