{"product_id":"m5stack-n9301-uart-audio-player-unit","title":"M5Stack Audio Player Unit (N9301)","description":"\u003cp\u003e\u003cvideo controls playsinline muted style=\"width:100%;height:auto;\"\u003e\u003csource type=\"video\/mp4\" src=\"https:\/\/m5stack-doc.oss-cn-shenzhen.aliyuncs.com\/1155\/U197-Unit-AudioPlayer.mp4\"\u003e\u003c\/video\u003e\u003c\/p\u003e\u003ch2\u003eM5Stack N9301 UART Audio Player Unit\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eM5Stack AudioPlayer\u003c\/strong\u003e Unit adds local audio-file playback to embedded products through an N9301 decoding chip, microSD card slot, UART control, and 3.5mm stereo output jack. A host can trigger and manage stored audio without implementing MP3 decoding itself.\u003c\/p\u003e\u003cp\u003eThe unit supports MP3 and WAV files on FAT16 or FAT32 microSD storage, with cards up to 32GB listed in the product specification. UART communication defaults to 9600bps, 8N1.\u003c\/p\u003e\u003ch2\u003eTrigger Stored Audio from Embedded Firmware\u003c\/h2\u003e\u003cp\u003eUse serial commands to play prompts, alarms, instructions, sound effects, or prerecorded messages. This fits smart-home interfaces, industrial status systems, guided exhibits, STEAM projects, and equipment that needs repeatable local audio without continuous network streaming.\u003c\/p\u003e\u003ch3\u003e3.5mm Stereo Audio Output\u003c\/h3\u003e\u003cp\u003eThe analog output connects to compatible powered speakers, amplifiers, or line-level receiving equipment. Confirm input level and impedance before connection; a line-level output should not be assumed to drive passive speakers directly.\u003c\/p\u003e\u003ch3\u003emicroSD File Management\u003c\/h3\u003e\u003cp\u003eOrganize files consistently and define firmware behavior for missing cards, unsupported files, corrupt storage, and power interruption. For unattended systems, validate the actual card brand, capacity, filesystem, and operating environment.\u003c\/p\u003e\u003ch2\u003ePlan Audio Prompts as Part of the Interface\u003c\/h2\u003e\u003cp\u003eKeep alerts distinguishable, avoid excessive repetition, and provide a visual or other secondary indication when a message is safety-relevant. Audio playback alone should not be the sole life-safety alarm path.\u003c\/p\u003e\u003cp\u003eTechnical setup details are available in the \u003ca href=\"https:\/\/docs.m5stack.com\/en\/products\/sku\/U197\" target=\"_blank\" rel=\"noopener\"\u003eM5Stack AudioPlayer documentation\u003c\/a\u003e.\u003c\/p\u003e","brand":"LogicBoundless","offers":[{"title":"Default Title","offer_id":49240512561367,"sku":"LB-M5-U197","price":6.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/8952\/2135\/files\/1_ba6bd94e-af93-42c0-8175-9632141999f7.webp?v=1783243352","url":"https:\/\/logicboundless.com\/products\/m5stack-n9301-uart-audio-player-unit","provider":"LogicBoundless","version":"1.0","type":"link"}