Looking at the Arduino Servo shield, it can be seen that there is an APC220 connector.

Servo Shield
Servo Shield


The APC220 radio module provides a simple and economic solution to wireless data communications. It integrates an embedded high speed microprocessor and high performance IC that creates a transparent UART/TTL interface, and eliminates any need for packetising and data encoding.

In short, it is a great little, low cost, module, with a good range, which enables you to easily build wireless projects.


  • Transmit distance up to 1000 m (line of sight) @ 9600 bps
  • 256 bytes data buffer
  • High sensitivity (-112 dBm @ 9600 bps)
  • GFSK modulation
  • UART/TTL interface
  • Embedded watch dog
  • Size: 37 x 17 x 6.5 mm (1.46 x 0.67 x 0.26 in)



On ebay, APC220 Wireless Communication Module for Arduino+USB Converter, the pair go for about £20.


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