HopeRF's RFM31B are highly integrated， low cost,433/868/915MHZ wirelessISM receiver module. The low receive sensitivity (-121dBm)ensuresextended range and improved link performance. Built-in antenna diversityand support for frequency hopping can be used to further extend range andenhance performance.

Additional system features such as an automatic wake-up timer, low batterydetector, 64 byte RX FIFO, automatic packet handling, and preamble detectionreduce overall current consumption and allow the use of a lower-cost systemMCU. An integrated temperature sensor, general purpose ADC, power-on-reset(POR), and GPIOs further reduce overall system cost and size.

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

An easy-to-use calculator is provided to quickly configure the radio settings.simplifying customer's system design and reducing time to market.

Applications:
 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