Understand the Alexa Gadgets Toolkit
The Alexa Gadgets Toolkit enables you to build your own Alexa Gadget. An Alexa Gadget is an Alexa-connected accessory that interacts with compatible Amazon Echo devices over Bluetooth. By using the Alexa Gadgets Toolkit, your Alexa Gadget can:
- Receive speechmark data, which enables the gadget to synchronize to Alexa's text-to-speech (TTS) in real time.
- React to notifications that are sent to the Echo device that the Alexa Gadget is connected to.
- Be alerted when timers, alarms, and reminders on the Echo device are set, cleared, expired, or dismissed.
- Be notified when the Echo device detects the wake word from the user.
- Get the current time from the Echo device.
- React to tempo data of songs from Amazon Music.
This topic provides an overview of the interfaces that Alexa Gadgets use to communicate with a compatible Echo device.
We hereafter refer to Alexa Gadgets as simply gadgets.
- How Gadgets Interact With Alexa
- Which Echo Devices Support Gadgets
- Before You Get Started
- About This Documentation
How Gadgets Interact With Alexa
Instead of communicating with Alexa directly, gadgets interact with Alexa through a compatible Echo device over Bluetooth. Gadgets use the directives and events defined by the Alexa Gadgets interfaces to exchange information with the Echo device. The Echo device handles all communications with Alexa.
The following figure shows how a gadget interacts with an Echo device, and where the Alexa Gadgets interfaces fit in.
The following steps describe the communication flow between a gadget, an Echo device, the Alexa service, and a skill:
- Bluetooth pairing – The gadget and the Echo device connect over Bluetooth as follows:
- The user puts the gadget in Bluetooth pairing mode, and then activates pairing mode on the Echo device. To activate pairing mode on an Echo device without a screen, the user uses the Alexa app. If the Echo device has a touchscreen, the user initiates pairing by selecting an option on the screen.
- The Echo device searches for a gadget to pair with. If the pairing is successful, the gadget and the Echo device connect over Bluetooth.
- Information flow – From then on, the gadget and the Echo device communicate as follows:
- Gadget to Echo device – The gadget sends events to the Echo device. The Echo device forwards the events to the Alexa service.
- Echo device to gadget – The Echo device sends directives from itself or from the Alexa service to the gadget.
Which Echo Devices Support Gadgets
The following Echo devices support gadgets:
- Echo (1st and 2nd generation)
- Echo Plus
- Echo Dot (1st, 2nd, and 3rd generation)
- Echo Show (1st and 2nd generation)
- Echo Spot
Before You Get Started
Before you create a gadget, keep the following in mind:
- Locales – You may only distribute, sell, or market for sale Alexa Gadgets in the following territories:
- United States
- United Kingdom
- Bluetooth connections – The Echo Dot and Echo Spot only support up to three Bluetooth connections. If you encounter challenges when pairing your gadget, ensure that the Echo device has enough Bluetooth connections available.
- Firmware version – Ensure that your Echo device has the following or higher firmware version:
- Echo (1st gen), Echo Dot (1st gen) – 618566920
- Echo (2nd gen), Echo Plus, Echo Dot (2nd gen) – 618571520
- Echo Dot (3rd gen) – 1761
- Echo Show (1st and 2nd gen), Echo Spot – 625533420
- Pairing and connectivity status – To validate whether your gadget is successfully paired to an Echo device, do the following:
- Echo devices without a screen – Go to Alexa Devices > [Echo device] > Bluetooth Devices in the Alexa app.
- Echo devices with a screen – Go to Settings > Bluetooth Devices on the screen of the Echo device.
About This Documentation
This documentation covers:
- Alexa Gadgets interfaces – For information about how your gadget can receive directives from and send events to an Echo device, see Data Format Overview and Interfaces That Support Gadgets.
- Gadget requirements – For information about hardware requirements for gadgets, see Hardware Requirements.
- Gadget registration – For information about how to register your gadget in the Alexa Voice Service (AVS) section of the developer portal, see Register a Gadget.
- Bluetooth settings and communication flow – For information about the communication flow between your gadget and an Echo device and the Bluetooth settings that your gadget must use, see Gadget Settings for Bluetooth Communication, Pair and Connect a Gadget to an Echo Device Over Bluetooth, and Reconnect a Gadget to an Echo Device Over Bluetooth.
- Data exchange – For information about the format of the packets that your gadget and the Echo device exchange over Serial Port Profile (SPP), see Exchange Packets.