Multiple questions please help

Multiple questions please help
« on: November 05, 2019, 10:42:33 AM »

1. Is it possible to flash another bootloader into the mircocontrollers ? (such as hoodloader2)

2. In the tutorial for tinycircuit smartwatch, there is a commented line stating the following:
"ST BLE module for compatiblity with Nordic's virtual UART connection".

May I know what is Nordic's virtual UART connection?? As I may try to use this virtual UART connection to use other libraries. (such as BLE SDK arduino)

3. Please tell me if emulation of HID is it possible on this tinydruino. As I am doing a project.

Please do answer, thank you very much! :D