We always recommend radio modules for anything but the highest volume new products. It's easy to cost-reduce one out (worst case, you just build the module your

We always recommend radio modules for anything but the highest volume new products. It's easy to cost-reduce one out (worst case, you just build the module yourself), it just takes a bit of cash flow to pay for it. And if your product isn't earning any money, then you have bigger problems than radio cost....