This note describes a two-way audio communications link between a ‘Master’ and a ‘Slave’, based on the Texas Instruments CC2510 System-on-Chip Low Power RF Transceiver. It operates in the 2.4 GHz ISM/SRD band. It has been optimized for low cost, using a PCB (Printed Circuit Board) folded dipole antenna and a minimum of external components. Several key features of the CC2510 are employed, including the internal ADC, the DSM (Delta-Sigma- Modulator), and ulaw

compression/expansion algorithm implemented in hardware. These features eliminate the need for an external CoDec (Coder-Decoder).

While the card described herein is based on the CC2510 and operates in the 2.4 GHZ band, both the card and the software can be easily modified for use with a CC1110 operating in the 433 MHz, 868 MHz, or 915 MHz bands.

http://www-s.ti.com/sc/techlit/swra225
Download associated code files