{"title":"Wireless \u0026 RF","description":"\u003cp\u003eCut the wires. Browse wireless and RF modules — \u003cstrong\u003eLoRa, nRF24L01, GSM\/GPRS, GPS, RFID, and Bluetooth\u003c\/strong\u003e — for projects that need to communicate near or far.\u003c\/p\u003e\u003cp\u003eFrom long-range telemetry to short-range mesh and asset tracking, these genuine modules are in stock with the antennas and breakouts to match. Fast shipping across India, Cash on Delivery, and a GST invoice.\u003c\/p\u003e","products":[{"product_id":"jt308-125khz-usb-proximity-sensor-rfid-reader-module","title":"JT308 125KHz USB Proximity Sensor RFID Reader Module","description":"\u003ch1\u003eJT308 125KHz USB Proximity Sensor RFID ID Card Reader Module\u003c\/h1\u003e\n\n\u003cp\u003eThe JT308 is a 125KHz USB proximity sensor RFID reader module that decodes standard EM4100 protocol tags and outputs the ID as keyboard keystrokes over USB. It is used for building access control systems, attendance trackers, and interactive projects. No driver installation is required—just plug it into any USB host and it behaves like a keyboard.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Frequency\u003c\/td\u003e\n\u003ctd\u003e125KHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProtocol\u003c\/td\u003e\n\u003ctd\u003eEM4100 (125kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eUSB 1.1\/2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Format\u003c\/td\u003e\n\u003ctd\u003e10 decimal digits + enter (keyboard)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRead Range\u003c\/td\u003e\n\u003ctd\u003eUp to 5 cm (depends on tag)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC via USB\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY access control system\u003c\/li\u003e\n  \u003cli\u003eAttendance logger with Raspberry Pi\u003c\/li\u003e\n  \u003cli\u003eInventory tracking of tagged items\u003c\/li\u003e\n  \u003cli\u003eInteractive exhibition with tag triggers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with any USB host that supports keyboard input—Windows, Mac, Linux, Raspberry Pi, and microcontrollers with USB host shields (like Arduino USB Host Shield). It draws power from the USB port (5V) and outputs standard key strokes, so no libraries are needed.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eNo external wiring is needed; simply plug the module into a USB port. The device enumerates as a HID keyboard. Ensure the USB host supplies 5V and sufficient current (50mA typical).\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Raspberry Pi?\u003c\/summary\u003e\u003cp\u003eYes, it works as a keyboard input device when connected via USB. You can read tag data using any program that accepts keyboard input.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it read 13.56MHz NFC cards?\u003c\/summary\u003e\u003cp\u003eNo, this reader operates at 125kHz and is designed for EM4100 protocol only. For NFC, consider a PN532 module.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat tags work with this reader?\u003c\/summary\u003e\u003cp\u003eIt works with standard 125kHz EM4100 frequency RFID tags and key fobs commonly used for access control. We also sell compatible tags separately.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444954063213,"sku":"CDN-0238","price":430.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_3da08354-7835-4d44-acd8-1a053f73d949.jpg?v=1781512330"},{"product_id":"jt308-125khz-usb-rfid-card-reader-module-proximity-sensor","title":"JT308 125KHz USB RFID Card Reader Module – Proximity Sensor","description":"\u003ch1\u003eJT308 125KHz USB Proximity Sensor Smart RFID ID Card Reader Module – Reads EM4100 Tags\u003c\/h1\u003e\n\n\u003cp\u003eThe JT308 is a USB plug-and-play RFID reader module designed for 125KHz proximity cards and key fobs. It reads standard EM4100 compatible tags and outputs the ID as keystrokes, making it ideal for access control, attendance logging, and DIY security projects. No drivers are needed; simply connect it to a computer or microcontroller USB host port and it works immediately.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Frequency\u003c\/td\u003e\n\u003ctd\u003e125KHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eUSB (HID Keyboard Emulation)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRead Range\u003c\/td\u003e\n\u003ctd\u003eUp to 5 cm (depending on tag)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupported Tag Types\u003c\/td\u003e\n\u003ctd\u003eEM4100, EM4200, compatible 125KHz tags\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC (via USB)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Format\u003c\/td\u003e\n\u003ctd\u003e10-digit decimal or 8-digit hex (configurable)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-arduino-rfid-door-lock\"\u003eRFID door lock system using Arduino or Raspberry Pi\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eEmployee attendance tracker with Python and a database\u003c\/li\u003e\n  \u003cli\u003eInventory management by tagging items with EM4100 stickers\u003c\/li\u003e\n  \u003cli\u003eDIY access control for lab equipment or tool cabinets\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis reader works with any USB host, including Windows, Linux, Mac, Raspberry Pi, and Android devices with OTG support. For microcontroller projects, use a USB host shield (e.g., for Arduino Uno) or a board with native USB host like Arduino Due or Raspberry Pi Pico. It operates at 5V and draws power directly from the USB bus.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eThe module has a standard USB-A connector; just plug it into a free USB port. If integrating into an embedded project without USB host, you'll need a USB host controller module. Avoid connecting it directly to UART pins; it communicates as an HID keyboard.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Raspberry Pi?\u003c\/summary\u003e\u003cp\u003eYes, plug it into any Raspberry Pi USB port; it will act as a keyboard and send the tag ID as keystrokes into your script or terminal.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it read 13.56 MHz NFC tags?\u003c\/summary\u003e\u003cp\u003eNo, this reader only works with 125KHz EM4100 protocol tags. For NFC, you would need a 13.56MHz module such as PN532.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it need an external power supply?\u003c\/summary\u003e\u003cp\u003eNo, it draws power from the USB port (5V, around 30mA) and requires no additional power source.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444999086445,"sku":"CDN-0614","price":430.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_45c9fc0e-2ada-411c-a910-eb70fe652cca.jpg?v=1781512729"},{"product_id":"433mhz-antenna-quarter-wave-helical-for-rf-modules","title":"433MHz Antenna | Quarter Wave Helical for RF Modules","description":"\u003ch1\u003e433MHz Antenna – Quarter-Wave Helical for Wireless RF\u003c\/h1\u003e\n\n\u003cp\u003eThis 433MHz antenna is designed for short-range wireless communication using RF modules. It provides reliable signal transmission and reception for remote controls, IoT sensors, and hobbyist radio projects. The helical design offers a compact yet effective solution with a nominal 2dBi gain, making it ideal for projects where size matters without sacrificing performance. With its 50-ohm impedance, it matches standard RF circuits, minimizing signal loss.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFrequency Range\u003c\/td\u003e\n\u003ctd\u003e433 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eImpedance\u003c\/td\u003e\n\u003ctd\u003e50 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eVSWR\u003c\/td\u003e\n\u003ctd\u003e≤2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGain\u003c\/td\u003e\n\u003ctd\u003e2 dBi typical\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePolarization\u003c\/td\u003e\n\u003ctd\u003eLinear (vertical)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eSMA Male (solderable pin also available)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003eApproximately 170 mm (quarter-wave)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e433MHz wireless remote control for lights or fans\u003c\/li\u003e\n  \u003cli\u003eIoT sensor node transmitting temperature\/humidity data\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/esp32-garage-door-opener-kit-auto-open-and-close-via-phone-ble\"\u003eGarage door opener or car remote replacement\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eSimple walkie-talkie for learning radio basics\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis antenna works with any 433MHz transmitter or receiver module, including popular pairs like FS1000A and XY-MK-5V. It connects via standard SMA jack or can be soldered directly to pads on circuits operating at 3.3V to 12V. Commonly used with Arduino, ESP8266, and Raspberry Pi for wireless data links. The quarter-wave design ensures a balanced radiation pattern in free space.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eIf using the SMA connector, screw it onto a mating SMA jack on your module. For direct solder, the center pin is the signal and the outer ground plane must be connected to circuit ground. Keep the antenna vertical and away from large metal objects for best range. No external matching network is required when used with typical 50Ω modules. For battery-powered projects, consider placing the antenna away from the battery to avoid detuning.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with 433MHz RF modules like FS1000A?\u003c\/summary\u003e\u003cp\u003eYes, it's tuned for 433MHz and directly fits modules with SMA jacks or solder pads. Works with FS1000A, XY-MK-5V, and similar.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat's the connector type?\u003c\/summary\u003e\u003cp\u003eThe antenna has an SMA male connector, but it also comes with a solderable pin at the base for direct PCB attachment.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this antenna outdoors?\u003c\/summary\u003e\u003cp\u003eIt is suitable for indoor and light outdoor use; however, for permanent outdoor installation, consider an antenna with weatherproofing like an IP-rated enclosure.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445046763885,"sku":"CDN-0857","price":110.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_6660c50d-5e35-470e-b703-a39be82130b1.jpg?v=1781513048"},{"product_id":"hc-05-bluetooth-module-spp-24ghz-masterslave","title":"HC-05 Bluetooth Module – SPP, 2.4GHz, Master\/Slave","description":"\u003ch1\u003eHC-05 Bluetooth Module – SPP Protocol, Master\/Slave, 2.4GHz\u003c\/h1\u003e\n\u003cp\u003eThe HC-05 is a versatile Bluetooth serial communication module that enables wireless data transfer between microcontrollers and other Bluetooth devices. It operates on the SPP (Serial Port Profile) protocol and can be configured as a master or slave, making it ideal for projects that require cable-free serial links. With a range of up to 10 meters and support for common baud rates, it’s a staple in IoT, robotics, and home automation.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBluetooth Version\u003c\/td\u003e\n\u003ctd\u003eV2.0+EDR\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e2.4GHz ISM band\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V (5V tolerant on RX)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCurrent\u003c\/td\u003e\n\u003ctd\u003e30mA (paired), 8mA (standby)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRange\u003c\/td\u003e\n\u003ctd\u003eUp to 10 meters (open space)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBaud Rate\u003c\/td\u003e\n\u003ctd\u003e9600bps default (adjustable up to 1382400)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWireless serial monitor for Arduino projects\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-bluetooth-controlled-car\"\u003eBluetooth-controlled robot or RC car\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eHome automation system with smartphone app\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-soil-sensor-data-logger\"\u003eWireless sensor data logger\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe HC-05 works with any microcontroller that has a UART\/serial interface, including Arduino Uno, Mega, Nano, ESP32, and Raspberry Pi (with level shifting). It uses 3.3V logic, but the RX pin is 5V tolerant, allowing direct connection to 5V MCUs. Common pairings include using it with an Arduino Uno for a Bluetooth-controlled LED matrix or a Raspberry Pi for a wireless serial gateway.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 3.3V (or a regulated 5V if the module has an onboard regulator), GND to common ground, TX of HC-05 to RX of MCU, and RX to TX. Do not exceed 5V on the RX pin. For AT command mode to change settings, enter command mode by pulling the KEY\/EN pin high before powering up or pressing a button on some modules.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, the HC-05 works perfectly with Arduino Uno. Connect HC-05 TX to Arduino RX (pin 0) and RX to TX (pin 1). Use the SoftwareSerial library if you need to keep the hardware serial for programming.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I switch between master and slave mode?\u003c\/summary\u003e\u003cp\u003eMode can be switched using AT commands via the serial interface. Enter command mode by pulling the KEY pin high before powering, then send AT commands to set the role.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I power it directly from a 5V Arduino pin?\u003c\/summary\u003e\u003cp\u003eMost HC-05 modules have a voltage regulator and can be powered from 5V, but check your module’s labeling. If not, use a logic level converter or power from 3.3V.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445068685677,"sku":"CDN-0897","price":240.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_5d593e04-5b55-4c70-bc59-dd42e5f1fc70.jpg?v=1781513135"},{"product_id":"neo-6m-gps-module-with-built-in-antenna","title":"NEO-6M GPS Module with Built-in Antenna","description":"\u003ch1\u003eNEO-6M GPS Module\u003c\/h1\u003e\n\u003cp\u003eThe NEO-6M GPS module provides accurate positioning using the U-blox 6 chipset. With a built-in ceramic antenna and serial interface, it's ideal for Arduino, Raspberry Pi, and other microcontroller projects. Start capturing GPS coordinates within seconds of power-up.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChipset\u003c\/td\u003e\n\u003ctd\u003eU-blox NEO-6M\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V - 5V DC (onboard regulator)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eUART TTL (TX, RX)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDefault Baud Rate\u003c\/td\u003e\n\u003ctd\u003e9600 bps\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePosition Accuracy\u003c\/td\u003e\n\u003ctd\u003e2.5 m CEP\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAntenna\u003c\/td\u003e\n\u003ctd\u003eBuilt-in ceramic patch antenna\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eGPS data logger for hiking and field surveys\u003c\/li\u003e\n  \u003cli\u003eReal-time vehicle tracking with GSM\/GPRS module\u003c\/li\u003e\n  \u003cli\u003ePortable navigation display using an OLED screen\u003c\/li\u003e\n  \u003cli\u003eAccurate time reference for NTP servers or radio clocks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eCompatible with any 3.3V or 5V microcontroller with UART including Arduino Uno, Mega, Nano, ESP32, Raspberry Pi (via level shifting if needed), and STM32. Outputs standard NMEA sentences and works well with the TinyGPS++ library for Arduino.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 3.3V or 5V, GND to ground, TX of GPS to RX of MCU, RX of GPS to TX of MCU (optional for commands). Default baud is 9600. For 5V Arduino, direct connection is fine due to onboard regulator. Keep the antenna side facing open sky for best reception.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes. Connect VCC to 5V, GND to GND, GPS TX to Arduino pin 4 (RX), and use SoftwareSerial. The onboard regulator handles the 5V safely.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it need an external antenna?\u003c\/summary\u003e\u003cp\u003eThe module includes a built-in ceramic patch antenna for most uses. For weak signal areas, some variants have a U.FL connector for an external active antenna.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the typical time to first fix?\u003c\/summary\u003e\u003cp\u003eCold start is around 27 seconds under open sky. Hot start can be under 1 second if the module has recent almanac data and a backup battery is connected.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445140218221,"sku":"CDN-0854","price":470.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_32ddc375-797b-49b3-bcad-e67273af3488.jpg?v=1781513523"},{"product_id":"rfid-cards-1356mhz-mifare-classic-pack-of-5-for-mfrc522","title":"RFID Cards 13.56MHz MIFARE Classic – Pack of 5 for MFRC522","description":"\u003ch1\u003eRFID Cards 13.56MHz MIFARE Classic – Pack of 5 for MFRC522\u003c\/h1\u003e\n\n\u003cp class=\"product-lede\"\u003eThese 13.56MHz MIFARE Classic RFID cards come in a pack of five, designed to work seamlessly with the popular MFRC522 reader module for Arduino, ESP32, and Raspberry Pi projects.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable class=\"specs-table\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eFrequency\u003c\/th\u003e\n\u003ctd\u003e13.56 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProtocol\u003c\/th\u003e\n\u003ctd\u003eISO 14443A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eChip\u003c\/th\u003e\n\u003ctd\u003eMIFARE Classic 1K\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMemory\u003c\/th\u003e\n\u003ctd\u003e1 KB (16 sectors × 4 blocks)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eData Retention\u003c\/th\u003e\n\u003ctd\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eWrite Endurance\u003c\/th\u003e\n\u003ctd\u003e~100,000 cycles\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eRead Range\u003c\/th\u003e\n\u003ctd\u003eUp to 10 cm (with MFRC522)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e85.6 × 54 mm (CR80)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-arduino-rfid-door-lock\"\u003e\n\u003cstrong\u003eRFID Door Lock:\u003c\/strong\u003e Use an Arduino Uno with MFRC522 to unlock a door when a matching card is scanned.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/rfid-attendance-system-kit-log-cards-to-sd-python-weekly-reports\"\u003e\n\u003cstrong\u003eIoT Attendance Logger:\u003c\/strong\u003e Log student attendance by scanning RFID cards and send data to a cloud spreadsheet via ESP32.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLibrary Self-Checkout:\u003c\/strong\u003e Build a kiosk with Raspberry Pi and RFID to track borrowed books in real time.\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/rfid-attendance-system-kit-log-cards-to-sd-python-weekly-reports\"\u003e\n\u003cstrong\u003eSmart Classroom Attendance:\u003c\/strong\u003e An RFID-based attendance recorder for CBSE practicals or ATL Tinkering Lab demonstrations.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/learn-authentication-build-an-rfid-access-control-system-kit-with-arduin\"\u003e\n\u003cstrong\u003eMulti-factor Authentication:\u003c\/strong\u003e Combine RFID card scan with PIN entry on ESP32 for a secure access control system.\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003ctable class=\"compat-table\"\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePlatform\u003c\/th\u003e\n\u003cth\u003eCompatible\u003c\/th\u003e\n\u003cth\u003eConnection\u003c\/th\u003e\n\u003cth\u003eLibrary \/ Method\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eSPI via MFRC522\u003c\/td\u003e\n\u003ctd\u003eMFRC522 library\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Nano\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eSPI via MFRC522\u003c\/td\u003e\n\u003ctd\u003eMFRC522 library\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Mega 2560\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eSPI via MFRC522\u003c\/td\u003e\n\u003ctd\u003eMFRC522 library\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eESP8266 NodeMCU\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eSPI via MFRC522\u003c\/td\u003e\n\u003ctd\u003eMFRC522 library\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eESP32 Dev Board\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eSPI via MFRC522\u003c\/td\u003e\n\u003ctd\u003eMFRC522 library\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRaspberry Pi Pico\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eSPI via MFRC522\u003c\/td\u003e\n\u003ctd\u003eMFRC522-pico library\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRaspberry Pi 4 \/ 5\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eSPI via MFRC522\u003c\/td\u003e\n\u003ctd\u003eMFRC522-python library\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWiring and Interface Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the MFRC522 reader to your microcontroller using SPI: typically wire SS to pin 10, RST to 9, SCK to 13, MOSI to 11, and MISO to 12 on an Arduino Uno. The cards are passive, requiring no power—simply hold them near the reader to read or write data. For platforms like Raspberry Pi, enable SPI in settings and use the corresponding MFRC522 Python library.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"faq\"\u003e\n  \u003cdiv class=\"faq-item\"\u003e\n    \u003ch3\u003eHow do I write data to these MIFARE Classic cards?\u003c\/h3\u003e\n    \u003cp\u003eYou can write up to 1KB of data using the MFRC522 library’s write functions, but each sector must be authenticated with a key first. Default keys are often FFFFFFFFFFFF for unused cards.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"faq-item\"\u003e\n    \u003ch3\u003eCan these cards be used for long-range identification?\u003c\/h3\u003e\n    \u003cp\u003eNo, the maximum read range is about 10 cm with the MFRC522 reader. For longer range, consider UHF RFID tags.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"Product\",\n      \"@id\": \"https:\/\/compoden.in\/products\/rfid-cards-1356mhz-mifare-classic-pack-of-5-for-mfrc522#product\",\n      \"name\": \"RFID Cards 13.56MHz MIFARE Classic – Pack of 5 for MFRC522\",\n      \"description\": \"5-pack 13.56MHz MIFARE Classic RFID cards for MFRC522 reader. Ideal for Arduino, ESP32, Raspberry Pi access control and attendance projects. Compoden India.\",\n      \"sku\": \"CDN-0974\",\n      \"mpn\": \"CDN-0974\",\n      \"brand\": {\"@type\": \"Brand\", \"name\": \"Compoden\"},\n      \"offers\": {\n        \"@type\": \"Offer\",\n        \"priceCurrency\": \"INR\",\n        \"price\": \"PRICE_PLACEHOLDER\",\n        \"availability\": \"https:\/\/schema.org\/InStock\",\n        \"seller\": {\"@type\": \"Organization\", \"name\": \"Compoden\", \"url\": \"https:\/\/compoden.in\"}\n      }\n    },\n    {\n      \"@type\": \"FAQPage\",\n      \"@id\": \"https:\/\/compoden.in\/products\/rfid-cards-1356mhz-mifare-classic-pack-of-5-for-mfrc522#faq\",\n      \"mainEntity\": [\n        {\"@type\": \"Question\", \"name\": \"How do I write data to these MIFARE Classic cards?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"You can write up to 1KB of data using the MFRC522 library’s write functions, but each sector must be authenticated with a key first. Default keys are often FFFFFFFFFFFF for unused cards.\"}},\n        {\"@type\": \"Question\", \"name\": \"Can these cards be used for long-range identification?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No, the maximum read range is about 10 cm with the MFRC522 reader. For longer range, consider UHF RFID tags.\"}}\n      ]\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53454858355053,"sku":"CDN-0974","price":75.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/p_ed41f721-6690-4b53-89d3-712fee0977ee.jpg?v=1782232949"}],"url":"https:\/\/compoden.com\/collections\/wireless-rf.oembed","provider":"Compoden","version":"1.0","type":"link"}