README

This is a driver for the HopeRF's RFM23B module written in C++ for Arduinos.

By default, the driver uses the RF module at full power, making it possible to transmit messages up to 30 meters inside a building.

This project includes a lightweight scheduler used to execute periodic tasks, and defer task execution till current task is completed. Other schedulers could be used if they offer millisecond precision and task preemption.

This C++ code does not make use of heap memory, making it embedded systems friendly. Only stack and static memories are used (only one module can be connected to the Arduino).

Features:
* 57.6 kbps @ 1% Duty Cycle over last second to meet regulation
* Carrier Sense
* Listen Before Talk
* CRC
* Auto retransmit point-to-point packets with exponential backoff
* Up to 60-bytes long packets
* Point-to-point and Broadcast
* 63 addresses
* Encryption using XXTEA
* Replay attack detection
* ACK to confirm message delivery
* Temperature reading
* ADC

Radio frequency, synchronization word (used as wireless packet boundary), encryption key, and node id are all configured at run-time. Other settings have to be configured at compilation time.

This project is not affiliated with HopeRF.

Link to RBM23C's product page: http://www.hoperf.com/rf_fsk/fsk/rfm23b.htm