RAK3172 Evo Board "Device is not in boot mode"

Hello guys, I am trying to update the lastest firmware for RAK3172 EVB and when ı already make the connection, arduino ide still says “Device is not in boot mode”. Why is that? I did the connections. Also, when ı try to connect via UART with STM32 programmer, it connects. So i am in boot mode. Why is that problem now?

Hi @tortudereli ,

What is the reply if you send AT+VER=?

The boot mode of RUI3 is different on the internal UART bootloader of the STM32WL chip. The BOOT pin doesn’t need to be pulled up for the RUI3 boot mode to be activated.