{"id":127137,"date":"2026-05-20T03:49:30","date_gmt":"2026-05-20T03:49:30","guid":{"rendered":"https:\/\/www.seeedstudio.com\/blog\/?p=127137"},"modified":"2026-06-04T06:59:42","modified_gmt":"2026-06-04T06:59:42","slug":"add-voice-interaction-to-lekiwi-robot-with-respeaker-flex","status":"publish","type":"post","link":"https:\/\/www.seeedstudio.com\/blog\/2026\/05\/20\/add-voice-interaction-to-lekiwi-robot-with-respeaker-flex\/","title":{"rendered":"Add Voice Interaction to LeKiwi Robot with reSpeaker Flex"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1030\" height=\"575\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/banner_javis-1030x575.png\" alt=\"\" class=\"wp-image-127275\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/banner_javis-1030x575.png 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/banner_javis-300x167.png 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/banner_javis-768x429.png 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/banner_javis-32x18.png 32w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/banner_javis-1024x572.png 1024w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/banner_javis.png 1376w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/figure>\n\n\n\n<p>Robots are becoming more intelligent, more autonomous, and more interactive. In this project, we combined the<strong> <a href=\"https:\/\/www.seeedstudio.com\/LeKiwi-Full-Kit-12V-Verision.html\" target=\"_blank\" rel=\"noreferrer noopener\">LeKiwi Robot<\/a><\/strong> platform with <a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>reSpeaker Flex<\/strong><\/a> to transform a Kiwi-drive robot into a voice-interactive embodied AI system capable of far-field wake word detection, natural language voice commands, real-time movement control, simultaneous audio playback and speech recognition, and hands-free human-robot interaction. By integrating <strong>voice AI<\/strong> with robotics, the system allows users to naturally speak to the robot and receive real-time responses in a much more intuitive and interactive way.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Why add the reSpeaker Flex microphone array to LeKiwi?<\/h1>\n\n\n\n<p>LeKiwi is already a highly flexible robotics platform. But after integrating reSpeaker Flex, the robot gains something fundamentally different: <strong>A true voice interaction interface.<\/strong><\/p>\n\n\n\n<p>This goes far beyond attaching a USB microphone.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1030\" height=\"773\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/3-1-1030x773.jpg\" alt=\"\" class=\"wp-image-128737\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/3-1-1030x773.jpg 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/3-1-300x225.jpg 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/3-1-768x576.jpg 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/3-1-1536x1152.jpg 1536w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/3-1-2048x1536.jpg 2048w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/3-1-32x24.jpg 32w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/3-1-1024x768.jpg 1024w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/figure>\n\n\n\n<p><a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">reSpeaker Flex<\/a> 4-microphone array provides onboard acoustic intelligence, including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Acoustic Echo Cancellation (AEC)<\/li>\n\n\n\n<li>Beamforming<\/li>\n\n\n\n<li>Noise Suppression (NS)<\/li>\n\n\n\n<li>Direction of Arrival (DoA)<\/li>\n\n\n\n<li>Far-field voice pickup<\/li>\n<\/ul>\n\n\n\n<p>These capabilities allow the robot to continue understanding voice commands even while:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Playing music<\/li>\n\n\n\n<li>Moving with motor noise<\/li>\n\n\n\n<li>Operating in noisy environments<\/li>\n<\/ul>\n\n\n\n<p>This is one of the key challenges in embodied AI: How can robots reliably \u201chear\u201d humans in the physical world?<\/p>\n\n\n\n<p>reSpeaker Flex addresses this by turning audio into a perception layer rather than simple sound capture.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">What Can the LeKiwi Robot Do?<\/h1>\n\n\n\n<p>Once integrated, the LeKiwi Robot becomes a fully <strong>voice-controlled robotic<\/strong> system.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Add Voice Control to LeKiwi Robot with reSpeaker Flex!!\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/341IbWb9K74?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>Users can interact naturally through commands such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u201cHey Jarvis, move forward\u201d<\/li>\n\n\n\n<li>\u201cTurn left\u201d<\/li>\n\n\n\n<li>\u201cStrafe right\u201d<\/li>\n\n\n\n<li>\u201cStop\u201d<\/li>\n<\/ul>\n\n\n\n<p>The system supports:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wake word activation<\/li>\n\n\n\n<li>Speech-to-text transcription<\/li>\n\n\n\n<li>LLM-based command understanding<\/li>\n\n\n\n<li>Voice feedback through TTS<\/li>\n\n\n\n<li>Real-time motor control<\/li>\n<\/ul>\n\n\n\n<p>This creates a much more natural interaction loop between humans and robots.<\/p>\n\n\n\n<p>Instead of pressing buttons or manually controlling movement, users simply speak to the robot.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">System Architecture<\/h1>\n\n\n\n<p>The project combines multiple AI and robotics components into a single voice pipeline.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Hardware<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1030\" height=\"773\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/2-1030x773.jpg\" alt=\"\" class=\"wp-image-128738\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/2-1030x773.jpg 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/2-300x225.jpg 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/2-768x576.jpg 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/2-1536x1152.jpg 1536w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/2-2048x1536.jpg 2048w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/2-32x24.jpg 32w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/05\/2-1024x768.jpg 1024w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/figure>\n\n\n\n<p>The setup includes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.seeedstudio.com\/Lekiwi-Kit-p-6501.html\" target=\"_blank\" rel=\"noreferrer noopener\">LeKiwi Robot<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.seeedstudio.com\/XIAO-ESP32S3-p-5627.html\" target=\"_blank\" rel=\"noreferrer noopener\">XIAO ESP32S3<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">reSpeaker Flex<\/a> <\/li>\n\n\n\n<li><a href=\"https:\/\/www.seeedstudio.com\/Raspberry-Pi-5-8GB-p-5810.html\" target=\"_blank\" rel=\"noreferrer noopener\">Raspberry Pi 5<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">AI Pipeline<\/h2>\n\n\n\n<p>The interaction flow works as follows:<\/p>\n\n\n\n<p><strong>Wake Word \u2192 Speech Recognition \u2192 LLM Reasoning \u2192 TTS Response \u2192 Robot Movement<\/strong><\/p>\n\n\n\n<p>This architecture combines voice AI and robotics into a single embodied interaction system.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Why Far-Field Voice Pickup Matters<\/h1>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Add Far-Field Voice Interaction to LeKiwi Robot with reSpeaker Flex\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/H_H-ZKCYD8c?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>One of the most impressive aspects of the project is its far-field voice interaction capability.<\/p>\n\n\n\n<p>In testing, the robot successfully responded to wake words and commands from distances of 5\u20137 meters.<\/p>\n\n\n\n<p>This is extremely important for real robotics deployments because users are rarely standing directly next to the robot.<\/p>\n\n\n\n<p>Far-field pickup allows robots to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hear commands across rooms<\/li>\n\n\n\n<li>Interact naturally while moving<\/li>\n\n\n\n<li>Support hands-free operation<\/li>\n\n\n\n<li>Maintain responsiveness in dynamic environments<\/li>\n<\/ul>\n\n\n\n<p>Combined with beamforming and noise suppression, reSpeaker Flex enables significantly more reliable interaction than conventional microphones.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Real-World Robotics Challenges<\/h1>\n\n\n\n<p>Voice interaction becomes much harder once robots begin moving and speaking simultaneously.<\/p>\n\n\n\n<p>Robots generate noise themselves. Motors spin. Speakers play audio feedback. Users interact from different distances and directions. In real-world environments, robots also need to handle far-field voice pickup, sufficiently powerful onboard speaker output for clear conversational feedback across different positions, room reverberation, background conversations, and acoustically complex spaces with reflections or partial occlusions.<\/p>\n\n\n\n<p>Without proper acoustic processing:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The robot hears its own speaker output<\/li>\n\n\n\n<li>Motor noise interferes with ASR<\/li>\n\n\n\n<li>Wake word accuracy drops<\/li>\n\n\n\n<li>Speech recognition becomes unstable<\/li>\n<\/ul>\n\n\n\n<p>In these scenarios, <strong>stable and natural human-robot interaction requires much more than simple audio input, it requires spatial audio perception, robust far-field voice capture, and real-time acoustic processing<\/strong>.<\/p>\n\n\n\n<p>That\u2019s why acoustic algorithms like <strong>beamforming<\/strong>, <strong>Acoustic Echo Cancellation (AEC)<\/strong>, <strong>noise suppression<\/strong>, and <strong>Direction of Arrival (DoA)<\/strong> become essential for embodied AI systems.<\/p>\n\n\n\n<p>With onboard AEC, <strong><a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">reSpeaker Flex<\/a><\/strong> can suppress the robot\u2019s own playback audio while preserving user speech.<\/p>\n\n\n\n<p>Combined with beamforming, noise suppression, and far-field voice pickup, <a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">reSpeaker Flex<\/a> enables the robot to continue understanding voice commands even while:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Playing music<\/li>\n\n\n\n<li>Moving with motor noise<\/li>\n\n\n\n<li>Operating in noisy environments<\/li>\n<\/ul>\n\n\n\n<p>This allows the robot to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Play music<\/li>\n\n\n\n<li>Speak through TTS<\/li>\n\n\n\n<li>Continue listening at the same time<\/li>\n<\/ul>\n\n\n\n<p>This full-duplex interaction model is essential for natural embodied AI experiences.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">More Than Just a Robot Demo<\/h1>\n\n\n\n<p>Projects like this demonstrate a broader trend in robotics:<\/p>\n\n\n\n<p><strong>Robots are evolving from passive machines into interactive AI systems.<\/strong><\/p>\n\n\n\n<p><strong>Voice<\/strong> becomes one of the most natural interfaces for embodied AI because it allows:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hands-free interaction<\/li>\n\n\n\n<li>Low-latency control<\/li>\n\n\n\n<li>Natural communication<\/li>\n\n\n\n<li>Multimodal perception<\/li>\n<\/ul>\n\n\n\n<p>And <strong>microphone arrays<\/strong> are becoming increasingly important as the \u201chearing system\u201d behind that interaction.<\/p>\n\n\n\n<p>Rather than simply recording audio, systems like<a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\"> reSpeaker Flex<\/a> provide:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Spatial hearing<\/li>\n\n\n\n<li>Acoustic perception<\/li>\n\n\n\n<li>Noise-robust interaction<\/li>\n\n\n\n<li>Real-time audio intelligence<\/li>\n<\/ul>\n\n\n\n<p>This is what enables robots to operate more naturally in human environments.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Start Building Your Own Voice Robot<\/h1>\n\n\n\n<p>This project provides a powerful starting point for developers interested in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Embodied AI<\/li>\n\n\n\n<li>Voice-enabled robotics<\/li>\n\n\n\n<li>Local AI agents<\/li>\n\n\n\n<li>Human-robot interaction<\/li>\n\n\n\n<li>Edge AI audio systems<\/li>\n<\/ul>\n\n\n\n<p>By combining <a href=\"https:\/\/www.seeedstudio.com\/LeKiwi-Full-Kit-12V-Verision.html\" target=\"_blank\" rel=\"noreferrer noopener\">LeKiwi<\/a> with <a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">reSpeaker Flex<\/a>, developers can rapidly prototype robots capable of natural speech interaction and real-world responsiveness.<\/p>\n\n\n\n<p>Whether you&#8217;re building:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>AI companion robots<\/li>\n\n\n\n<li>Educational robotics<\/li>\n\n\n\n<li>Interactive assistants<\/li>\n\n\n\n<li>Smart service robots<\/li>\n\n\n\n<li>Experimental embodied AI systems<\/li>\n<\/ul>\n\n\n\n<p>voice interaction is quickly becoming a core part of the experience.<\/p>\n\n\n\n<p>And it starts with giving robots the ability to hear intelligently.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>Get the reSpeaker Flex here: <a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\">reSpeaker Flex 4-Mic Array: Split Type For Embodied AI | Seeed Studio<\/a><\/p>\n\n\n\n<p>Get the LeKiwi Kit here: <a href=\"https:\/\/www.seeedstudio.com\/LeKiwi-Full-Kit-12V-Verision.html\">LeKiwi Full Kit (12V Verision)<\/a><\/p>\n\n\n\n<p>Check the LeKiwi + reSpeaker Flex integration wiki here: <a href=\"https:\/\/wiki.seeedstudio.com\/respeaker_flex_lekiwi\/\">Add Voice Interaction to Your LeKiwi Robot with reSpeaker Flex | Seeed Studio Wiki<\/a><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Robots are becoming more intelligent, more autonomous, and more interactive. In this project, we 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