BLE4.0 BLE4.1 和BLE4.2 的主要区别

https://www.quora.com/What-are-the-main-differences-between-Bluetooth-4-0-4-1-and-4-2-in-the-Layers-Baseband-LMP-L2CAP-app-Layer 

http://sina.com.hk/news/article/20131223/0/5/0/-38766.html?cf=o.digital 

BLE4.1相比BLE4.0的区别是：

1）与4G网络合并共处，减少干扰

2）可以同时做主和从，提供速度

3）ipv6

4）简化了设备的连接过程

V4.0 到V4.1 硬件不需要改变。

BLE4.1和BLE4.2的区别：

http://www.semiconductorstore.com/blog/2015/BLE-4-2-vs-BLE-4-1/1548 

Key Bluetooth 4.2 Features Not Available with Bluetooth 4.1

 

IoT Capabilities:

• Low-power IP (IPv6/6LoWPAN)
• Bluetooth Smart Internet Gateways (GATT)

With BLE 4.2 Bluetooth Smart sensors can transmit data over the internet.

 

Security:

• LE Privacy 1.2
• LE Secure Connections

With new, more power efficient and highly secure features, BLE 4.2 provides additional benefits allowing only trusted owners to track device location and confidently pair devices.

  

Speed:

• 250% Faster
• 10x More Capacity