RFM22B-S2 Wireless Transceiver 868MHz

The RFM22B is a low-cost ISM FSK transceiver module which offers communication at 868MHz ISM bands and adjustable output power of up to +20 dBm. The wide operating voltage range of 1.8-3.6 V and low current consumption makes the RFM22B an ideal solution for battery powered applications.

Communication with the RFM22B is achieved via a standard 4-wire SPI interface. Three configurable general purpose I/Os are also available, the use of which can be tailored towards the needs of your project. A host of other features are also available including an 8-bit ADC, temperature sensor, RX and TX FIFOs, and low-battery detection. See the datasheet below for a complete description of every register and command.

Features

• Frequency Range: 868MHz ISM bands
• Sensitivity = -121 dBm
• Output power range: +20 dBm Max
• 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)
• Power-on-reset (POR)
• Antenna diversity and TR switch control
• Configurable packet handler
• Preamble detector
• TX and RX 64 byte FIFOs
• Low battery detector
• Temperature sensor and 8-bit ADC
• -20 to +85C temperature range
• Integrated voltage regulators
• Frequency hopping capability
• On-chip crystal tuning

Dimensions: 16 x 16mm (0.63 x 0.63 in)

Documents

• Datasheet
• Product Page
• Example Code (ATmega328)
• SFE Eagle Library has this part!