/api/spi

SPI module allows sending and receiving data on SPI bus.

If you have not enabled SPI yet, better do it now: Enabling SPI.

Raspberry Pi has 2 SPI channels, use number (0 or 1) in spi/%d to select channel.

/spi/%d/frequency

Use GET to read and POST to set spi frequency. Frequency is in JSON number format.

POST to /spi/%d

Perform simultaneous read and write. JSON String format in body will be written to SPI bus, and the string of the same length will be read and returned.

Example:

"test"

""

test was written to the SPI bus, and all zeros were read, so empty string was returned.