SDK I2C Code. Today’s “Duh!” Story.

This entry is here as a helper (hopefully) for any other poor soul banging their head against the wall of Espressif’s I2C “master” implementation. <TL;DR Spoiler> When using the i2c_master.c code supplied with the IoT SDK, you must call i2c_master_gpio_init() before any other I2C functions in your code (and, obviously, your GPIOs need to be correctly … Continue reading SDK I2C Code. Today’s “Duh!” Story.