The rfm95 package provides a Go interface to an SPI-attached
RFM95W module.
An RFM95W module on a convenient breakout board is available here.
A Raspberry Pi add-on module with an RFM95W, OLED display, and pushbuttons is available here.
Note that an antenna must be attached before using these modules.
The current version supports only OOK modulation (on-off keying) and a proprietary packet format (variable-length, null-terminated). Patches to support more general use are welcome.
The default configuration for ARM CPUs corresponds to the wiring of the Adafruit RFM95W bonnet:
| Function | GPIO | Header Pin |
|---|---|---|
SPI0 SDO |
10 | 19 |
SPI0 SDI |
9 | 21 |
SPI0 SCLK |
11 | 23 |
SPI0 CE1 |
7 | 26 |
RFM95 DIO2 |
24 | 18 |
RFM95 RESET |
25 | 22 |
The SPI configuration corresponds to the Linux /dev/spidev0.1 device.
The default configuration for 386 CPUs assumes the following wiring:
| Function | GPIO | Mini-Breakout Pin |
|---|---|---|
SPI5 SDO |
115 | J17-12 |
SPI5 SDI |
114 | J18-11 |
SPI5 SCLK |
109 | J17-11 |
SPI5 CE1 |
111 | J17-10 |
RFM95 DIO0 |
46 | J19-5 |
RFM95 RESET |
47 | J20-5 |
The SPI configuration corresponds to the Linux /dev/spidev5.1 device.