Google releases Android Things Developer Preview 5 based on Android O
Android Things Developer Preview 5 is quite important since this is now based on Android O, which is still under development for phones and tablets.
As expected, the 5th Android Things developer preview is aimed at developers and early adopters, and it should be used for development and compatibility testing on supported hardware platforms. According to Google, this release may still have some stability issues on supported hardware, so you're asked to send your feedback if you discover any bugs.
It's also worth noting that Google did not enable all APIs in this preview, but you'll find a list of the disabled APIs in the “Known Issues” section if you want to know if your app will work or not.
Rumor has it, Google plans to launch Android O on August 21, or at least announce the market name of this version of the platform. It's unclear whether or not Google will release another developer preview until then.