DRF4432D20I-L2 is a wireless RS485 interface module designed for operations in the unlicensed ISM (Industrial Scientific Medical) and LPRD bands. FSK (Frequency Shift Keying) modulation/demodulation, multi-channel operation, high bandwidth efficiency and anti-blocking performance make DRF4432D20I-L2 modules easy to realize the robust and reliable wireless link.
The module can be configured to work in 40 channels with 1MHz channel space, which reduces the interface from adjacent channels. It contains NetID and NodeID. Only modules with the same NetID can communicate. The NodeID of modules can be different and it doesn’t affect the normal use. This ID is reserved for the future network module.
DRF4432D20-L2 integrates 256 bytes buffer. When the buffer is empty, users can transfer 200 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). The module provides standard UART/TTL interface for selection. Users can choose seven data rates and three parity checks which make DRF4432D20I--L2 possibly tailor-made for different applications. DRF4432D20I-L2 operates at 3.4~5.5V with extra low standby current which makes it suitable for battery powered-up applications. DRF4432D20I-L2 is the RS485 interface module and it is compatible in communication with RS232 inteface module DRF4432D20I-L1 and TTL interface module DRF4432D20I-M1/M2.