{"title":"Communication \u0026 Wireless","description":"","products":[{"product_id":"esp-01-esp8266-serial-wifi-wireless-transceiver-module","title":"ESP-01 ESP8266 Serial WIFI Wireless Transceiver Module","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThe base 8-pin ESP8266 WiFi module — small, low-cost, and the predecessor to NodeMCU-style development boards.\u003c\/p\u003e\u003ch3\u003eKey Specs\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMCU\u003c\/td\u003e\n\u003ctd\u003eESP8266\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWireless\u003c\/td\u003e\n\u003ctd\u003eWiFi 802.11 b\/g\/n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eUART (serial AT commands, or custom firmware)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V (not 5V tolerant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eVery small, low-cost WiFi module\u003c\/li\u003e\n\u003cli\u003eNeeds an external USB-to-serial programmer (no onboard USB)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible With\u003c\/h3\u003e\u003cp\u003eArduino IDE (ESP8266 board package), or default AT-command firmware\u003c\/p\u003e\u003ch3\u003eUse Cases\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAdding WiFi to an existing microcontroller project\u003c\/li\u003e\n\u003cli\u003eLow-cost WiFi sensor nodes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eCan I program it directly over USB?\u003c\/strong\u003e No — it needs a separate USB-to-serial adapter (see our ESP-01 programmer).\u003c\/p\u003e","brand":"Kitkraft","offers":[{"title":"Default Title","offer_id":42646282010763,"sku":"KK000024","price":145.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0637\/1908\/0075\/files\/esp01_2.png?v=1722482273"},{"product_id":"rc522-rfid-reader-writer","title":"RFID Reader\/Writer RC522 SPI S50 with RFID Card and Tag","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eAn RC522-based 13.56MHz RFID reader\/writer module with SPI interface, including a test card and key fob tag.\u003c\/p\u003e\u003ch3\u003eKey Specs\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChip\u003c\/td\u003e\n\u003ctd\u003eRC522\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e13.56MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eSPI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003ePinout\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePin\u003c\/th\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSDA\/CS, SCK, MOSI, MISO\u003c\/td\u003e\n\u003ctd\u003eSPI data lines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIRQ\u003c\/td\u003e\n\u003ctd\u003eInterrupt (optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGND, RST, VCC\u003c\/td\u003e\n\u003ctd\u003eGround, reset, power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eReads and writes compatible MIFARE-type RFID cards\/tags\u003c\/li\u003e\n\u003cli\u003eIncludes a test card and key fob\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible With\u003c\/h3\u003e\u003cp\u003eArduino, ESP32, any SPI-capable MCU\u003c\/p\u003e\u003ch3\u003eUse Cases\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eRFID-based access control and door locks\u003c\/li\u003e\n\u003cli\u003eAttendance\/check-in systems\u003c\/li\u003e\n\u003cli\u003eContactless ID projects\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIs it 5V safe?\u003c\/strong\u003e No — VCC must stay at 3.3V.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich library should I use?\u003c\/strong\u003e The “MFRC522” library is the standard choice for Arduino.\u003c\/p\u003e","brand":"Kitkraft","offers":[{"title":"Default Title","offer_id":42650076905611,"sku":"KK000043","price":160.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0637\/1908\/0075\/files\/rfid_reader_6.png?v=1722653358"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0637\/1908\/0075\/collections\/iot_and_wireless.png?v=1723697782","url":"https:\/\/www.kitkraft.in\/collections\/iot-wireless.oembed","provider":"Kitkraft","version":"1.0","type":"link"}