where to find esp32 i2c&spi example

[roctwo]

If I want to use i2c and spi interface of esp32,is there any example or detail document to refer? The document about interface programing is very poor.

[kolban]

The formal I2C and SPI drivers for ESP32 (ESP-IDF) are not yet available. The ESP32 is a new device to the market and there is some lag between release and finalization of the drivers. In the meantime, you might want to look at the ESP32-Arduino project which does have SPI/I2C support. We should anticipate I2C and SPI drivers within a few months (opinion).