I already put the file nRF5FlashSoftDevice.jar in the folder ~\Documents\Arduino\tools\nRF5FlashSoftDevice\tool to install SoftDevice flashing tool as previous version such as Arduino IDE 1.8.14 etc..But can not find the option in tools menu. How can I add this option?
Hi @nakayobb. The classic Arduino IDE's tools system is not supported by Arduino IDE 2.x. So if you require one of these tools you'll need to continue to use the classic Arduino IDE.
You can follow the IDE developers' progress on providing a replacement for this capability here: