从RN4677迁移到RN4871问题

我正在将一个产品从使用RN467到BLD模式迁移到RN48 71的过程中。然而，我们需要与使用第三方蓝牙模块的第四方设备配对。RN467 7可能只使用WorkSturnices安全性，但这不清楚，因为我的前任使用EEPROM写命令（S:L＆T.＆GT，L＆G.T）来配置它。所以，我需要RN467内存映射来完全理解正在RN467上配置。基于代码注释和BT窥探，我有RN878广告与RN467 7相同的服务，第三方设备连接，但似乎从来没有配对。我相信问题是与安全。似乎RN878实际上并没有像RN467那样使用。为了得到工作，没有结束需要验证PIN码，我相信RN48 71应该设置以下命令：SA，2SP，00，所使用的服务似乎是透明的UART，这两个RN模块支持本地。我们的产品作为第三方设备的外围设备。在透明的UART中，客户机/服务器的概念有点模糊。RN467和RN878之间使用的加密方法不同吗？我相信这在BLE 4和4.2之间发生了变化。如果是这样，我如何配置RN878为向后兼容？非常感谢您的帮助！谢谢您！J



      以下为原文

    I'm in the process of migrating a product from using the RN4677 in BLE mode to the RN4871.  However, we need to pair with a 3rd party device that uses a 4th party Bluetooth module.

The RN4677 likely uses Just-Works security, but this is unclear since my predecessor uses EEPROM write commands (S:,<>,<>) to configure it.  So, I need the RN4677 memory map to fully understand was is being configured on the RN4677.

Based on code comments and BT snooping, I have the RN4871 advertising the same services as the RN4677, and the 3rd party device connects, but never seems to pair.  

I believe the issue is with the security.  It seems that the RN4871 is not actually using Just-Works in a manner like the RN4677.  To get Just-Works to work with neither end needing to validate a pin code, I believe the RN4871 should set the following commands:
SA,2
SP,0000

The service being used appears to be the Transparent UART, which both RN modules support natively. Our product operates as a peripheral to the 3rd party device.  With Transparent UART, client/server notions are a bit vague.

Is a different encryption method used between the RN4677 and RN4871?  I believe this changed between BLE 4.0 and 4.2.
If so, how do I configure the RN4871 to be backward compatible?

Any help is greatly appreciated!

Thank you!
J