I came across Worldbuilding's fortnightly topic challenges recently. It's based on this meta post on meta SE about topic challenges. I think this could be a nice way to promote our site by challenging on the one hand existing members to ask questions in said topic and on the other hand having quite focused topics to advertise on other sites and in interested communities.
It also gives a sneaking excuse to mention our site on a recurring basis on meta SE. That can certainly not hurt. So first, I am calling for vehement opposition to be voiced now or forever hold your peace. Secondly I am calling for topic suggestions.
Please suggest single topics per answer.
"Tag lines" as well as possible promotion targets (i.e. communities that might be interested in those challenges) for those suggestions can gladly be suggested in the comments of the answers.
Internet of Things Topic Challenges
Internet of Things Topic Challenge #1 - Keeping my gadget data private
Questions about the privacy and data security on IoT gadgets, e.g. wearables and health gadgets.
Internet of Things Topic Challenge #2 - New types of sensor nodes
Questions about new and emerging endpoint technology.
Internet of Things Topic Challenge #3 - Build your own hardware to run Alexa Voice Service
Use the Alexa Voice Service (AVS) to add intelligent voice control to any connected product that has a microphone and speaker.
I'll also update the list in my answer to the post on meta Stack Exchange.
Current front runner for next challenge:
Build your own hardware to run Alexa Voice Service
(by Bence Kaulics)