One of the easiest ways to add wireless communication to your mobile robot! 

Description:

This modem work as a serial (RX/TX) pipe. Any serial stream from 9600 to 115200bps can be passed seamlessly from your computer to your target. This unit has been  tested successfully over open air at 350ft (106m)!

The remote unit can be powered from 3.3V up to 6V for easy battery attachment. All signal pins on the remote unit are 3V-6V tolerant. No level shifting is required.

Specifications:

• FCC Approved Class 1 Bluetooth Radio Modem
• Extremely small radio  - 0.15x0.6x1.9"
• Very robust link both in integrity and transmission distance (100m) - no more buffer overruns!
• Low power consumption : 25mA avg
• Hardy frequency hopping scheme - operates in harsh RF environments like WiFi, 802.11g, and Zigbee
• Encrypted connection
• Frequency: 2.4~2.524 GHz
• Operating Voltage: 3.3V-6V
• Serial communications: 2400-115200bps
• Operating Temperature: -40 ~ +70C
• Built-in antenna
• Dimensions: 51.5x15.8x5.6mm

Documentation:

• Schematic
• Eagle Cad Files
• Roving Networks Bluetooth Command Set
• Roving Networks Bluetooth module datasheet
• Roving Networks RN-24 Usage Guide