Datasheet

Using the RFM69 Radio

This page is shared between the RFM69 breakout and

the all-in-one Feather RFM69's. The example code and

overall functionality is the same, only the pinouts used

may differ! Just make sure the example code is using

the pins you have wired up.

Before beginning make sure you have your Arduino or Feather working smoothly, it will make this part a lot easier.

Once you have the basic functionality going - you can upload code, blink an LED, use the serial output, etc. you can

then upgrade to using the radio itself.

Note that the sub-GHz radio is not designed for streaming audio or video! It's best used for small packets of data. The

data rate is adjustable but its common to stick to around 19.2 Kbps (thats bits per second). Lower data rates will be

more successful in their transmissions

You will, of course, need at least two paired radios to do any testing! The radios must be matched in frequency (e.g.

900 MHz & 900 MHz are ok, 900 MHz & 433 MHz are not). They also must use the same encoding schemes, you

cannot have a 900 MHz RFM69 packet radio talk to a 900 MHz RFM9x LoRa radio.

"Raw" vs Packetized

The SX1231 can be used in a 'raw rx/tx' mode where it just modulates incoming bits from pin #2 and sends them on the

radio, however there's no error correction or addressing so we wont be covering that technique.

Instead, 99% of cases are best off using packetized mode. This means you can set up a recipient for your data, error

correction so you can be sure the whole data set was transmitted correctly, automatic re-transmit retries and return-

https://learn.adafruit.com/adafruit-rfm69hcw-and-rfm96-rfm95-rfm98-lora-packet-padio-

breakouts

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