Adafruit Radio Bonnets with OLED Display - RFM69 or RFM9X

published January 23, 2019, last updated October 02, 2024

posted in Adafruit Products Raspberry Pi Programming/ Python

Beginner

Product guide

Pinouts

There are 4 different Radio Bonnets, with RFM69 or RFM9X and with 900MHz or 433MHz - however the overall pinouts are identical for all four!

Radio Module Pins

There's a radio module on each bonnet, which we connect to the Raspberry Pi SPI port plus some extra pins for controlling.

We connect the radio module to a set of default pins that match our code and examples, you can cut the solder traces on the bottom and re-wire them but the code/examples will need to be updated as well.

Each radio has the same pin names and connections. Its easiest to see the pin numbering on the bottom.

The two sets of pins here are broken out from the radio module. The defaults are:

RST - Radio reset pin, connected to GPIO25 on the Pi. It's pulled high by default which is reset. Pull LOW to turn on the radio.
CS - Radio SPI Chip Select pin, connected to SPI CE1 on the Pi
CLK - Radio SPI Clock pin, connected to SPI SCLK on the Pi
DI - Radio SPI data in pin, connected to SPI MOSI on the Pi
DO - Radio SPI data out pin, connected to SPI MISO on the Pi
DIO0 - Radio digital IO #0 pin, we use this for status or IRQs. It's required for all our examples. Connected to GPIO 22 on the Pi
DIO1 - Radio digital IO #1 pin, we use this for status. This is not used for our basic CircuitPython code, but is used by some more advanced libraries. You can cut this trace if you want to use the Pi pin for other devices. Connected to GPIO 23 on the Pi
DIO2 - Radio digital IO #2 pin, we use this for status. This is not used for our basic CircuitPython code, but is used by some more advanced libraries. You can cut this trace if you want to use the Pi pin for other devices. Connected to GPIO 24 on the Pi
DIO3 - Radio digital IO #3, not connected or used at this time.
DIO4 - Radio digital IO #3, not connected or used at this time.