An app note from Microchip, Bluetooth smart communication using Microchip RN4020 module and 16-bit PIC microcontroller (PDF!):
This application note provides the following:
• Framework for any of the user application platform
using RN4020 module and PIC24FJ series
of microcontrollers.
• Specifically an interface of RN4020 module with
PIC24FJ128GA010 microcontroller.
• Start up or reference code to command RN4020
module through PIC® microcontroller.
• Initial procedures or techniques for interfacing a
PIC microcontroller and BLE module.Note: This application note is not intended to
provide a complete understanding of the
Bluetooth technology principles or using
the commands related to the RN4020
module.