WatchChar is not implemented in ESP32

[Dweaver309]

The WatchChar is not implemented in Windows.Devices.SerialCommunication for ESP32.

[MatthiasJentsch]

I can't find out how the event gets from PostManagedEvent routed to the correct event handler in C#.

[MatthiasJentsch]

The last code is here, but it's not working I call PostManagedEvent and the C# event handler will not be called.
https://github.com/MatthiasJentsch/nf-interpreter/blob/watchchar/targets/FreeRTOS/ESP32_DevKitC/nanoCLR/Windows.Devices.SerialCommunication/win_dev_serial_native_Windows_Devices_SerialCommunication_SerialDevice.cpp

[josesimoes]

I think the code is missing is the native interrupt wrappers. Wrote this as a reminder. See here.
As it seems that that is not a true interrupt handler, pherhaps the closest would be to wrap the switch statment there (line 107) and 125-126.

[MatthiasJentsch]

Thanks @josesimoes for the hint with the portIndex. For UART0 the portIndex 1 should be send because COM1 is UART0 in the ESP32.