Note impOS™ 39 has been solely made available internally and to select early testers. As such, most developers and customers will not receive it except in its public release form, impOS 40. As such, all other Electric Imp documentation will refer only to impOS 40 when discussing this release.
Changes apply to all imps unless stated otherwise.
The current release is 39.19.
Note This release branches from impOS 38.3, so please see the 38 release notes for earlier changes.