NINA-B31 series - Getting Started
UBX-18022394 - R02
Evaluation board
Page 14 of 26
3.2
Restore default serial settings
If the SW2 button is pressed during power on, the module resets the serial settings and escape
sequence to the default values.
•
Default serial settings are 115.2 kbps, 8N1 and HW flow control enabled
•
Default escape sequence is +++
•
Default escape sequence timing is 1s silence before and after the escape sequence
3.3
Restore factory settings
If both the SW1 and SW2 buttons are pressed for 10 seconds during power up, the factory settings
are restored. You can also restore to the factory settings using the
AT+UFACTORY
command followed
by power off/on.
3.4
Enter the bootloader
To enter the bootloader, press the SW1 and SW2 buttons during a reset; this starts the module in the
u-blox bootloader. You can also enter the bootloader using the
AT+UFWUPD
command. The bootloader
will time out and resume the application after 10 seconds.
3.5
Flashing the module
The PC tool s-center can be used to flash NINA-B31. Instructions on flashing the NINA-B31 can be
found in the Software section of the NINA-B3 System Integration Manual [11].
Go to the u-blox support webpage to obtain the latest available software.
