433MHz 500mW RS485 Interface Module DRF7020D27-A2
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DRF7020D27-A2 is a 500mW RS485/TTL interface radio modem transceiver module designed for operations in the unlicensed ISM (Industrial Scientific Medical) and LPRD bands. GFSK (Frequency Shift Keying) modulation/demodulation, multi-channel operation, high bandwidth efficiency and anti-blocking performance make DRF7020D27-A2 modules easy to realize the robust and reliable wireless link.
Features:
* GFSK transceiver Module
* 433Mhz ISM frequency band
* 19.2k bps data rate
* Multiple channels
* 27dBm Max. output power
* Baud rate configurable
* RS485/TTL interface
* 256 bytes data buffers
* Standby current < 5uA
* Supply voltage 4.7~8V

Application:
Home automation,  Security alarm,  Telemetry,  Automatic meter reading,  Contactless access,  Wireless data logger,  Remote motor control
The module can be configured to work in different channels with 200k Hz space. It adopts high efficient looped interleaving EDAC (Error Detection and correction) coding with coding gain up to 3dB which keeps in advance in EDAC and coding efficiency over normal FEC (Forward Error Correction). Because of its high reliability in correction, modules can filter error and fake information automatically and realize truly transparent wireless link, which makes DRF7020D27-A2 very suitable in the rigid communication environment.
 
DRF7020D27-A2 integrates 256 bytes buffer. When the buffer is empty, users can transfer 256 bytes data per time and even limitless data transfer can be achieved as long as RF data rate (RF module to RF module) is configured to be faster than UART data rate (MCU to RF module).Users can choose seven data rates and three parity checks which make DRF7020D27-A2 possibly tailor-made for different applications.The module has RS485/TTL interface and DRF7020D27-A1 is RS232/TTL interface. Both of the two modules can communicate with lower power versions 13dBm module DRF7020D13 and 20dBm module DRF7020D20.
 
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