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SparkFun RF Transceiver Breakout - RFM22B-S2 (434 MHz)

Item #: WRL-10154
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Price: $10.50 inc GST
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    Here is the breakout board for the RFM22B which gives you access to the pins. The RFM22B is a low-cost ISM (industrial, scientific, and medical) FSK (frequency-shift keying) transceiver module which offers communication at 434MHz and adjustable output power of up to +17 dBm. The wide operating voltage range of 1.8–3.6 V and low current consumption makes the RFM22 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.

    In our testing, a 17cm wire attached to the ‘ANT’ pin worked just fine. A hole is drilled next to the ‘ANT’ pin for strain relief.


    • Frequency Range = 434 MHz
    • Sensitivity = -118 dBm
    • +17 dBm Max Output Power (Configurable)
    • Low Power Consumption
    • Data Rate = 1 to 128 kbps
    • Power Supply = 1.8 to 3.6 V
    • Ultra low power shutdown mode
    • Digital RSSI
    • Wake-on-radio
    • Auto-frequency calibration (AFC)
    • Configurable packet structure
    • Preamble detector
    • TX and RX 64 byte FIFOs
    • Low battery detector
    • Temperature sensor and 8-bit ADC
    • -40 to +85 °C temperature range
    • Integrated voltage regulators
    • Frequency hopping capability
    • FSK, GFSK, and OOK modulation
    • Low BOM
    • Power-on-reset (POR)

    Dimensions: 0.63x0.63in (16x16mm)