Gracefully fail when I2C device not present in u8g2_esp32_hal init

[amaschas]

I'm using u8g2_esp32_hal to interface with an I2C OLED device, and whenever the OLED screen is not connected the program aborts, causing a restart. The reason this happens is because ESP_ERROR_CHECK macros are used in several places, which simply abort the thread if they fail. I'm wondering if instead of using ESP_ERROR_CHECK, the relevant functions could print a message and return an error code that users could handle themselves.

Alternatively, maybe provide a function that can test the I2C connection without aborting?

This line is the one that generally causes the abort for me:

esp32-snippets/hardware/displays/U8G2/u8g2_esp32_hal.c

Line 159 in fe3d318

ESP_ERROR_CHECK(i2c_master_cmd_begin(I2C_MASTER_NUM, handle_i2c, I2C_TIMEOUT_MS / portTICK_RATE_MS));