KT1025A蓝牙音频芯片产品串口测试方法以及说明

串口的基础概念就不描述了，网上好多。产品的串口都是AT指令，注意是非标的。和其他厂家的模块不一样

波特率出厂默认是115200 。上电会自动返回模块或者芯片的一些参数，如版本、蓝牙名、UUID等等参数

只要给模块发送了正确的数据，模块是一定会返回OK或者ER+x等等信息，注意查看

如果在调试的过程中，遇到问题。请不要着急，冒然怀疑这，怀疑那。因为问题是要一步一步的去解决。

我们做售后遇到的各种客人，其实最终的解决办法，基本就是如下：无其他

1、先使用“电脑端”的串口调试助手，把USB转TTL工具的TX和RX短接，看一下自发自收是否正常

2、检查一下蓝牙模块，上电主动返回的串口信息是否有收到。

3、在调不通的情况下，一定要使用电脑端的串口调试助手试一下，推荐使用我们提供的。

4、然后发送一下“AT”指令，看模块是否会返回“ER+x”信息。如果返回就一切正常

5、还要检查一下USB转TTL的工具，我们再三声明，建议使用CH340G的芯片板。因为我们的芯片是弱驱，其他的USB转TTL的模块，可能会有问题。

6、如果都排查了，最后也是有可能模块本身不良。但是这种概率极低，就出现一例[2年时间]

If you encounter problems during debugging. Please don t worry, doubt this, doubt that. Because the problem needs to be solved step by step.

In fact, the final solution for all kinds of customers we meet after sales is basically as follows: nothing else

1. First, use the serial port debugging assistant of the computer end to short connect the TX and Rx of the USB to TTL tool to see if the spontaneous self collection is normal

2. Check whether the serial port information returned from Bluetooth module is received.

3. In case of failure in debugging, it is necessary to use the serial port debugging assistant of the computer end to try it. It is recommended to use what we provide.

4. Then send the at command to see if the module will return the ER + X message. If you go back, it s all right

5. Also check the USB to TTL tool. We have repeatedly stated that we recommend using ch340g chip board. Because our chip is a weak drive, other USB to TTL modules may have problems.

6. If all of them are checked, it is possible that the module itself is defective. But the probability is very low, so there is an example [2 years]