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CC2541的蓝牙模块可以连接CC2540模块吗?

Other Parts Discussed in Thread: CC2541, CC2540, CC2650

原来主机和从机都是使用的CC2541的蓝牙模块,可以连接。今天又一块CC2540模块,烧录经过更改的程序后不能和原来的CC2541模块连接了,但是用手机APP可以发现和连接。请问一下这是为什么,哪里需要修改吗?