1, you first need a symbol 802.15.4 standard PHY and MAC, on the market a lot of 2.4 GHz and Sub - G rf chip, can choose 2.4 GHz radio frequency chips, but be sure to support the DSSS and CCA, and 802.15.1 specification, requires the hardware support FHSS,

2, the MAC layer is the most critical, in 802.15.4 standard, imposes strict sequential operations, such as the super frame, dormant, same BLE also have a tough time slot synchronization, real-time processing in the harsh, MCU is not strong, so the chip original protocol stack, many are able to take advantage of special registers and circuit chip to realize real-time processing, we can type a FPGA to handle such a real-time events, but for cost control, cost control of the FPGA in 5 cents, actually like some real-time processing of the communication protocol, using a special circuit also consume much gate,

3, the NWK layer can refer to a lot of information, AODV routing algorithm, we can be based on a RTOS to development, such as free RTOS,

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