This library controls many Silicon Laboratories Si47xx family radio chips with an Arduino microcontroller. Major features include:
• I2C and SPI bus
• Supports "original" (Uno, Duemilanove, and their clones), Mega 2560, Leonardo, and Due Arduinos
• FM/AM receive modes; including short, medium, and long wave AM
• Analog and/or digital audio output
• FM RDS and RBDS
• Localization of receive bands, channel spacing, FM de-emphasis, and RDS/RBDS
• Correctly decodes RBDS PI codes...