RF2400 BK2421

www.inhaos.com RF2400 modules 2.4GHZ

Uses www.Bekencorp.com  BK2421 IC like Hope RFM70

An RFM70 contains 6 so-called data pipes that can receive packages.
Each pipe has an address, and will receive only messages
for that address.
Pipes 0 and 1 have a full (up to 5 bytes) address.
For pipes 2 .. 6 only the least significant byte can be
configured, the other bytes are copied from the address of pipe 1.
The length of the address (3, 4 or 5 bytes) is the same for
transmission and for all 6 receive data pipes.

Cool, so you use pipe 0 to talk to your master higher up the tree, and use 1-6 to talk to your slaves (children) hance enabling a multi star network


From AN0002-RF2410U USB RF Programming.pdf

BK2421 is a
RF chip which highly compatible with Nordic nRF24L01. Its register’s configuration is basically consistent with nRF24L01. The biggest difference is the former has two BANK register (Bank0,Bank1) while nRF24L01 just has one. So BK2421 power-on initialization not only needs to initialize Bank0, also need to initialize
The nRF24L01+(nRF24L01p) is a single chip 2.4GHz transceiver with an embedded baseband protocol engine (Enhanced ShockBurst™), suitable for ultra low power wireless applications. The nRF24L01+ is designed for operation in the world wide ISM frequency band at 2.400 - 2.4835GHz. 
To design a radio system with the nRF24L01+, you simply need an MCU (microcontroller) and a few exter-nal passive components. The high air data rate combined with two power saving modes make the nRF24L01+ very suitable for ultra low power designs. nRF24L01+ is drop-in compatible with nRF24L01 and on-air compatible with nRF2401A, nRF2402, nRF24E1 and nRF24E2. Intermodulation and wideband blocking values in nRF24L01+ are much improved in comparison to the nRF24L01 and the addition of internal filtering to nRF24L01+ has improved the margins for meeting RF regulatory standards

Protocol: http://www.elecfreaks.com/wiki/index.php?title=2.4G_Wireless_nRF24L01p







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