I have a customised bootloader using uart + BL, built from the SDK examples and modified using articles found here. It works - most of the time. The product is a cusom board which provides connections to the outside world either by uart or by gpio signalling. Both are provided - it's up tto the customer which method they use.
My issue is thus: If the uart is initialised without an interface physical connection, the system hangs (and in my case the watchdog resets it). I discovered this when developing my application and I got around it by checking the gpio line first as the "idle" state of a logic-level uart is high, and only initialising the uart if there is a signal present.
For this same reason, the BLE+UART Bootloader crashes if there is no physical interface connected. So I want to prevent the uart service from running in the same way. But I'm finding it difficult to follow the SDK code, especailly as documentation is scant.
So can you advise the best way for me to skip the uart listener at runtime?
