If disable 2.4g radio on main node,the child node still work.the iot could work and control.I'd have to guess what the issue here is with the sparse information provided.
Can you elaborate on your network, it's behavior, and what you think needs to change?
Welcome To SNBForums
SNBForums is a community for anyone who wants to learn about or discuss the latest in wireless routers, network storage and the ins and outs of building and maintaining a small network.
If you'd like to post a question, simply register and have at it!
While you're at it, please check out SmallNetBuilder for product reviews and our famous Router Charts, Ranker and plenty more!