User Manual

VMA348
V. 01 – 15/04/2020 3 ©Velleman nv
5. Overview
General
The RFM69HCW module is an inexpensive and versatile radio module. You can use it to send
text or binary data between two or hundreds of modules. It's perfect for building inexpensive
short-range wireless networks for home and building automation, sensor networks, automated
meter readings, wireless alarm and security systems, industrial monitoring and control, and
many more applications!
The RFM69HCW transceiver module operates over a wide frequency range, including the 315,
433, 868 and 915 MHz license-free ISM (Industry Scientific and Medical) frequency bands. All
major RF communication parameters are programmable and most can be set dynamically. The
RFM69HCW is optimized for low power consumption while offering high RF output power and
channelized operation.
The VMA348 RFM69HCW transceiver breakout board brings out all the pins and the antenna
connection. Each module comes with headers pre-soldered, a 3.3 V voltage regulator and level
shifter that can handle 3-5 VDC power and logic so you can use it with 3 V or 5 V devices. You
will need to solder a small piece of wire to create your antenna or you can add a UFL or SMA
edge-mount connector and attach an external antenna.
By using the provided library, the frequency of the board can be set with 61 Hz precision to
any frequency from 240.0 MHz to 960.0 MHz.
Technical Specifications
168 dB maximum link budget
+20 dBm - 100 mW constant RF output
high sensitivity ..................................................................... down to -120 dBm at 1.2 kbps
high selectivity .............................................................................. 16-tap FIR channel filter
low current .............................................................. Rx = 16 mA, 100 mA register retention
programmable Pout ................................................................. -18 to +20 dBm in 1 dB step
FSK bit rates up to 300 kb/s
fully integrated synthesizer with a resolution of 61 Hz
FSK, GFSK, MSK, GMSK, LoRa™ and OOK modulation
packet engine with CRC-16, AES-128, 66-byte FIF
115 dB+ dynamic range RSSI