ESP32 UART event UART_DATA size -1

[elektrofuzzis]

Hi,

I'm working with the standard UART driver. My event-task gets events using xQueueReceive.

UART_DATA events are processed without any trouble.

UART_BREAK events show some data and event's size is realistic. But sometimes I get very high values, e.g. 1070515788 or 4294967295.

What's wrong?

Stefan

[MicroController]

UART_BREAK events don't have any data.
The size values you are seeing in UART_BREAK events are just 'random' values from the stack.
uart_event_t::size is only valid if and when uart_event_t::type is UART_DATA and must be ignored for all other event types.