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What you need to know before building
This project combines a Raspberry Pi, Seeed’s circular ReSpeaker 4-Mic Array for Raspberry Pi, a separate speaker, and Google’s Assistant Service sample. Do not confuse that board with Seeed’s separate linear-array kit or a USB ReSpeaker product.
Seeed lists four microphones, a 12-LED programmable APA102 ring, Grove connectors, and voice-processing examples for the board. Seeed also specifies voice capture within a 3-meter radius; that is a manufacturer claim, not an independently verified performance result. The array has no audio output interface, so the Pi needs a separate speaker or other output device.
Google’s Raspberry Pi setup guide specifies a Raspberry Pi 3 Model B. Seeed lists support through Raspberry Pi 4B. These sources do not establish compatibility with Raspberry Pi 5, nor do they confirm that the full Google sample and Seeed driver stack works on a current Raspberry Pi OS release. Treat this as a documented maker build, not a currently verified installation recipe.
The Tool Desk
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- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Understand Google’s software options and limits
Google’s Raspberry Pi flow uses the Assistant Service: the sample streams user audio to Google and receives Assistant audio in return. Google’s documented sequence covers hardware and networking, audio setup and testing, developer-project configuration, device-model registration, SDK and sample installation, and running the sample.
The older Google Assistant Library for Python was deprecated on June 28, 2019; Google directs developers to use the Assistant Service instead. Google describes the SDK as available for experimental and non-commercial use only and warns against launching commercial devices that integrate it.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
The Assistant Service is not a full smart-speaker feature set. Google says it does not provide hands-free “Ok Google” activation, timers and alarms, podcast or news playback, or broadcast voice messages. Its documentation includes audio capture and playback and reference code for conversation state, but those capabilities should not be mistaken for the missing features.
Assemble the hardware
Choose the correct ReSpeaker board
Use the ReSpeaker 4-Mic Array for Raspberry Pi, the circular, input-only board named in this project. Check the exact product identity before using any setup instructions: similarly named linear-array and USB products are different hardware.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Add audio output
Connect a separate speaker or other audio output supported by your Pi setup. The 4-Mic Array captures audio but cannot play the Assistant’s response; Seeed’s product page lists no audio output interface.
Mount and connect the array safely
Seeed instructs users to align the HAT carefully and warns against hot-plugging. Follow the board maker’s physical-connection guidance, but do not assume its driver instructions apply unchanged to every current OS or kernel.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Set up Google’s documented Assistant Service flow
- Prepare the Pi and network. Google’s guide starts with Raspberry Pi hardware, a microphone, a speaker, an SD card, and network and date/time setup. Its named starting board is Raspberry Pi 3 Model B; it is not evidence that every step is optimal for newer models.
- Configure and test audio. Establish microphone capture from the ReSpeaker and playback through the separate speaker. Seeed’s page describes installing its
seeed-voicecarddriver, rebooting, and choosing an audio output inraspi-config. These are the manufacturer’s documented steps, not confirmation of compatibility with every present-day Pi OS/kernel combination. - Configure the Google developer project. Google’s setup requires a Cloud project, enabling the Assistant API, and OAuth credentials for the sample. Use Google’s developer-project configuration guide for the project and credential steps.
- Register a device model. Follow Google’s Raspberry Pi Assistant Service guide to create and register the device model used by the sample.
- Install and run the SDK sample. Continue with Google’s Raspberry Pi setup guide for SDK and sample installation, authorization, and execution. The credential JSON must be available on the Pi for authorization; keep it private and do not publish it.
Google’s overall Raspberry Pi flow is documented in its Assistant setup guide. Because the sources do not establish end-to-end compatibility with current Pi OS, confirm driver, kernel, and SDK behavior for the exact board and OS version you intend to use before relying on this build.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the ReSpeaker features do—and do not do
Seeed documents voice activity detection, direction-of-arrival estimation, and keyword-spotting examples for the array. These are board and example capabilities; the documentation does not establish that Google’s Assistant Service automatically uses them. In particular, the array’s keyword-spotting examples do not make the Google sample hands-free: Google says its Service does not provide “Ok Google” activation.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
For the board’s specifications, driver notes, and examples, see Seeed’s ReSpeaker 4-Mic Array for Raspberry Pi documentation.
Does the old Google Assistant Raspberry Pi tutorial still work?
It should not be followed as though the original Python Assistant Library were still supported: Google deprecated that library on June 28, 2019, and points developers to the Assistant Service. Google still documents a Raspberry Pi Service flow, but the available documentation does not verify that its sample, Seeed’s driver, and a current Raspberry Pi OS release install and work together end to end. A successful result on one software combination should not be assumed for another.
Quick Recap
Is this the right build for your goal?
- Use this path if you want to experiment with Google’s documented, non-commercial Assistant Service and are prepared to validate audio and software compatibility on your specific Pi setup.
- Choose a different approach if you need a commercial product, hands-free wake-word activation, alarms, broadcast messages, or the broader capabilities of a Google smart speaker.
- Compare hardware by exact model if audio output or Pi compatibility is important. The circular 4-Mic Array in this guide is input-only; do not transfer its specifications or connection instructions to a differently named ReSpeaker product.
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