This is another great IIC/I2C/TWI/SPI Serial Interface. As the pin resources of FOR Arduino controller is limited, your project may be not able to use normal LCD shield after connected with a certain quantity of sensors or SD card. However, with this I2C interface module, you will be able to realize data display via only 2 wires. If you already has I2C devices in your project, this LCD module actually cost no more resources at all. It is fantastic for Arduino based project.

USB-SD MP3 Shield MODULE board

Bluetooth Transceiver Module HC-06

This Bluetooth module can easily achieve serial wireless data transmission. Its operating frequency is among the most popular 2.4GHz ISM frequency band (i.e. Industrial, scientific and medical). It adopts Bluetooth 2.0+EDR standard. In Bluetooth 2.0, signal transmit time of different devices stands at a 0.5 seconds interval so that the workload of bluetooth chip can be reduced substantially and more sleeping time can be saved for bluetooth. This module is set with serial interface, which is easy to use and simplifies the overall design/development cycle.

HC?05 module is an easy to use Bluetooth SPP (Serial Port Protocol) module

GSM/GPRS/GPS Shield (B), Arduino Shield Based on SIM808 

HC-08 Bluetooth Module is a new generation of Bluetooth specification V4.0 BLE Bluetooth protocol based on the transmission module

Product Description
HC-09 Bluetooth module

Feature:
1, serial module operating voltage 3.3V.
2, the baud rate can be set 2400,4800,9600,19200,38400,57600,115200,230400
3 core module size: 28mm x 15 mm x 2.35mm.

Bluetooth 4.0 HM-10 Master Slave Module use TI CC2541, Master and slave roles in one, transmission version and remote control version and PIO state acquisition functions in one, Support the AT command modify module parameters, Convenient and flexible.
Transmission version can be used to transmit data between two Bluetooth devices.
Remote Control version can be used to Control PIO ports output high or low level without any other MCU.
PIO state acquisition version can be used to acquisition PIO ports state without any other MUC. (Only support Bluetooth V2.1)

This is a SMD BLE module used in our BLE Bee and Xadow BLE. It is based on TI CC2541 chip, enables robust network nodes to be built with low total bill-of-material costs and highly suited for ultralow power consumption systems. The module is small and easy to use, with the preprogrammed firmware of manufacturer, you could quickly build BLE communications via its AT command. Supporting BLE communications with iphone, ipad and Android 4.3.

The latest infrared wireless remote control kit