Moto Z Droid and Moto Z Force Droid are the new phones from Motorola. They run Android 6.0 on a Qualcomm Snapdragon 820 SoC with a lot of other features.
Motorola brought modularity to Moto Z using the hackable “Moto Mods” backplate expansion system. Motorola’s Moto Mods attach to the back of the phone with strong magnets and are hot swappable (plug and play).
According to the ANANDTech review, “Attaching a Moto Mod produces a small vibration and audible alert confirming that it has been automatically recognized. For any Mods with internal batteries, there’s a notification that pops up showing the charge level, which also appears in the battery section within the settings app and in the notification shade. There’s a dedicated “Moto Mods” page also in settings for updating the Mod’s firmware, managing its settings, and reading its instructions.“.
Motorola wants makers to have the ability to develop their own Moto Mods, so they collaborated with Element14, the well known distributor of technology products and solutions for electronic system design, to offer a Moto Mods Development Kit for building custom Moto Mods.
According to Element14, Moto Mods Development Kit consists of the reference Moto Mod, a perforated board for you to solder your own components to, or HAT adapter board enables you to attach a wide variety of Raspberry Pi HATs to your Moto Mods™ Development Kit and an example cover.
Motorola has created several personality cards that can be inserted into the reference Moto Mod through the 80-pin connector. Each of these personality cards is a full example with open-sourced Moto Mod firmware and an Android application.
Each personality card has a documentation page in the developer site of Moto Mod to reach all the resources needed from schematic to source code.
For more details: Moto Mods Development Kit – Make Your Own Extension for Moto Z Phone