Nucleo-F411RE uart bootloader don’t work.

[Blue Vincent]

I am developing with Nucleo-F411RE Board an trying to use UART2 bootloader to flash my program.I use STM32CubeProgrammer to do this.when connect my board, ide report that Error: Activating device: KO. Please, verify the boot mode configuration and check the serial port configuration. Reset your device then try again... 

Here is my configure:

Start uart bootloader through ttl.TX(PA2),RX(pA3),BOOT0 3.3v,I can’t see BOOT1 on the board.

[Imen.D]

Hello @Blue Vincent​ and welcome to the Community :)

Make sure that you configure your board in bootloader mode and N​RST is connected to the debugger.

Check the STM32F411xx bootloader configuration in system memory boot mode in the AN2606, and that bootloader is activated by applying Pattern 1 (described in Table 2: Bootloader activation patterns).

Imen

[Blue Vincent]

I did not configure NRST pin and I dont konw where is the debugger.

[Blue Vincent]

I did not configure NRST pin and I dont know where is the debugger, should I configure NRST to 3.3v?