1. Descriptions of RF Receiver Module RFM31BW:

HopeRF's RFM31B are highly integrated, low cost,433/868/915MHZ wireless ISM rf receiver module.The low receive sensitivity (–121dBm) ensures extended range and improved link performance. Built-in antenna diversity and support for frequency hopping can be used to further extend range and enhance performance.

The RFM31B's digital receive architecture features a high-performance ADC and DSP based modem which performs demodulation, filtering, and packet handling for increased flexibility and performance.

2. Features of RF Receiver Module RFM31BW:

● Frequency Range: 433/868/915
● Sensitivity : –121 dBm
● Low Power Consumption: 18.5 mA
● Data Rate: 0.123 to 256 kbps
● FSK, GFSK, and OOK modulation
● Power Supply: 1.8 to 3.6 V
● Ultra low power shutdown mode
● Digital RSSI
● Wake-up timer
● Auto-frequency calibration (AFC)
● Clear channel
● Programmable assessment RX BW 2.6–620 kHz
● Programmable packet handler
● Programmable GPIOs
● Embedded antenna diversity algorithm
● Configurable packet handler
● Preamble detector
● RX 64 byte FIFO
● Low battery detector
● Temperature sensor and 8-bit ADC
● –40 to +85 °C temperature range
● Integrated voltage regulators
● Frequency hopping capability
● On-chip crystal tuning
● Low BOM
● Power-on-reset (POR)

3. Applications of RF Receiver Module RFM31BW:

● Remote control 
● Home security & alarm 
● Telemetry 
● Personal data logging 
● Toy control 
● Tire pressure monitoring 
● Wireless PC peripherals 
● Remote meter reading 
● Remote keyless entry 
● Home automation 
● Industrial control 
● Sensor networks 
● Health monitors 
● Tag readers