{"product_id":"usb-cereal","title":"USB-Cereal","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eUSB-Cereal is an open-source \u003cstrong\u003eUSB-C debug tool\u003c\/strong\u003e that gives you \u003cstrong\u003eUART serial access\u003c\/strong\u003e through the \u003cstrong\u003esideband (SBU) pins\u003c\/strong\u003e of a standard USB-C connector, with no exposed pads, no debug headers, and no disassembly required. It sits inline between your device and your workstation: one port connects to the device under test, a pass-through port keeps your normal USB connection live, and the debug port presents a standard \u003cstrong\u003evirtual COM port\u003c\/strong\u003e to the host via an FTDI FT232RNQ or CP2102N bridge. Open any serial terminal and you're reading logs immediately.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWhat makes USB-Cereal genuinely different from a standard USB-to-UART adapter is where the serial signal comes from. Because it taps the \u003cstrong\u003eSBU sideband pins\u003c\/strong\u003e rather than the USB data lines, it works \u003cstrong\u003ecompletely independently of the USB stack\u003c\/strong\u003e. That means you get serial output from the \u003cstrong\u003every first instruction your processor executes\u003c\/strong\u003e, including bootloader stages and early kernel bringup where USB-based logging simply isn't available yet.\u003cbr\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0990\/5029\/1549\/files\/Screenshot_2026-04-30_072854.png?v=1777527056\" alt=\"\" width=\"192\" height=\"91\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eA manual slide switch selects \u003cstrong\u003e1.8 V or 3.3 V signaling\u003c\/strong\u003e to match your target hardware, and the intentional absence of auto-detection means it also works with non-standard or partial UART implementations. TX and RX activity are visible on dedicated onboard LEDs. Standard FTDI and Silicon Labs drivers are supported natively across \u003cstrong\u003eLinux, macOS, and Windows\u003c\/strong\u003e, with no custom tooling required on the host side.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0990\/5029\/1549\/files\/Screenshot_2026-04-30_072835.png?v=1777527108\" alt=\"\" width=\"313\" height=\"108\"\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eIf your device has a USB-C port and routes UART to the SBU pins, USB-Cereal is the cleanest way to get serial access to it.\u003c\/p\u003e","brand":"Soldered","offers":[{"title":"Default Title","offer_id":64557697958237,"sku":"333367","price":39.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0990\/5029\/1549\/files\/usb-cereal-enclosure-cs_jpg_md-fixed-xl.jpg?v=1777462632","url":"https:\/\/soldered.com\/products\/usb-cereal","provider":"Soldered Electronics","version":"1.0","type":"link"}