Wireless

ESP8266 ESP-03 Serial WIFI Transceiver Module

ESP-201 ESP8266 Serial Port Module Send Receive IO Lead Out WIFI Wireless

ESP8266 ESP-12E UART WIFI Wireless Shield Development Board for Arduino UNO R3

Micro NRF24l01 + wireless module

2.4G WiFi Bluetooth wireless control receiver antenna built-in antenna model IPX gold-plated silver wire head

Mini XS3868 Bluetooth V2.0 Stereo Audio Module Board OVC3860 Supports A2DP AVRCP

ESP-12F ESP8266 WIFI serial port

Bluetooh Bee wireless module

NRF24L01 2.4GHz Antenna Wireless Transceiver Module

 wireless bluetooth module hc - 05 without base plate

SIM900 Module GSM GPRS Shield expansion board wireless module Function more than TC35i for Arduino

You can add GSM/ GPRS connection feature to your Arduino projects with GPRS Shield. You can use functions as dialing number and sending SMS easily with AT commands. To communicate between module and Arduino you can use Arduino's hardware serial port or software serial port which can be defined by Software Serial library.  

RC522 RFID Module with IC Card