Hi @surya11,
Starting with BSP 3.0, we dropped the support for Angstrom distribution so the package manager will not work. In short, you will not be able to install packages using "opkg install " because the feeds are not available.
You need to add packages and build the image as told in our previous posts .
Let me know if you are facing issue in adding packages /compiling the image.
Let us now if you still have doubts, we can connect and answers your questions