{"product_id":"rdm6300-rfid-rf-module-uart-serial-output-card-reader-125khz","title":"RDM6300 RFID RF Module UART Serial Output 125kHz Card Reader","description":"\n\u003ch2\u003eRDM6300 Single Chip RFID RF Module – UART Serial Output Card Reader\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eRDM6300 RFID RF Module\u003c\/strong\u003e is a compact, single-chip 125kHz radio frequency identification reader designed for seamless integration into DIY electronics projects, access control systems, automation builds, and microcontroller setups. Featuring a straightforward \u003cstrong\u003eUART serial output\u003c\/strong\u003e, this module makes reading 125kHz EM4100-compatible RFID cards and key fobs fast, reliable, and developer-friendly.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle-Chip Design:\u003c\/strong\u003e Built around the RDM6300 IC for a lightweight, minimal-footprint solution.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e125kHz Operating Frequency:\u003c\/strong\u003e Compatible with standard EM4100 and EM4102 RFID cards and tags.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUART Serial Output:\u003c\/strong\u003e Clean TTL-level serial data output for easy interfacing with Arduino, Raspberry Pi, STM32, and other microcontrollers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlug-and-Play Integration:\u003c\/strong\u003e No complex configuration required — power it up and start reading cards immediately.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e Small PCB footprint makes it ideal for embedded projects and space-constrained enclosures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStable Read Performance:\u003c\/strong\u003e Consistent card detection at typical read distances for reliable project operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Works with most standard 125kHz RFID cards, key fobs, and wristbands.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip:\u003c\/strong\u003e RDM6300\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Frequency:\u003c\/strong\u003e 125kHz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterface:\u003c\/strong\u003e UART (TTL Serial)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e DC 5V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Card Standards:\u003c\/strong\u003e EM4100, EM4102\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Format:\u003c\/strong\u003e 9600 bps serial ASCII data\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePerfect For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eArduino \u0026amp; Raspberry Pi RFID projects\u003c\/li\u003e\n  \u003cli\u003eDIY access control and door lock systems\u003c\/li\u003e\n  \u003cli\u003eAttendance tracking and inventory management builds\u003c\/li\u003e\n  \u003cli\u003eMaker spaces, hobbyist electronics, and STEM education\u003c\/li\u003e\n  \u003cli\u003eEmbedded systems and IoT prototyping\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eYou May Also Like\u003c\/h3\u003e\n\u003cp\u003eLooking for more components and accessories for your builds? Check out our \u003ca href=\"\/products\/round-aluminum-wire-diy-jewelry-making-1mm-3mm\"\u003eRound Aluminum Wire for DIY Projects\u003c\/a\u003e or explore creative DIY options like our \u003ca href=\"\/products\/ccb-flat-round-spacer-beads-diy-jewelry-making\"\u003eCCB Flat Round Spacer Beads for DIY Making\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/personal-protective-equipment\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on personal protective equipment\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the RDM6300 RFID RF Module used for?\u003c\/h4\u003e\n\u003cp\u003eA: The RDM6300 RFID RF Module is a 125kHz card reader designed for electronics projects, DIY access control systems, and microcontroller integrations. It reads standard EM4100-compatible RFID cards and key fobs and outputs the card data via UART serial communication, making it ideal for Arduino, Raspberry Pi, and similar platforms.\u003c\/p\u003e\n\u003ch4\u003eQ: What microcontrollers are compatible with the RDM6300 UART serial output module?\u003c\/h4\u003e\n\u003cp\u003eA: The RDM6300 RFID module is compatible with virtually any microcontroller that supports UART serial communication, including Arduino (Uno, Mega, Nano), Raspberry Pi, ESP8266, ESP32, STM32, and more. It outputs data at 9600 bps TTL-level serial, making integration straightforward across platforms.\u003c\/p\u003e\n\u003ch4\u003eQ: What types of RFID cards and tags work with the RDM6300 reader module?\u003c\/h4\u003e\n\u003cp\u003eA: The RDM6300 module works with 125kHz passive RFID cards, key fobs, and wristbands that follow the EM4100 or EM4102 standard. These are among the most widely available RFID credentials, making them easy to source for your project.\u003c\/p\u003e\n\u003ch4\u003eQ: Does the RDM6300 module require any special drivers or software libraries?\u003c\/h4\u003e\n\u003cp\u003eA: No special drivers are required. The RDM6300 communicates via standard UART serial at 9600 bps, so you can use any basic serial read function in your chosen programming environment. Many open-source libraries and code examples are available for Arduino and other platforms to get you started quickly.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the RDM6300 RFID RF Module used for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The RDM6300 RFID RF Module is a 125kHz card reader designed for electronics projects, DIY access control systems, and microcontroller integrations. 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