fix the readme

README.md

@@ -1,3 +1,77 @@
 # LLSync_sdk_adapter
 sdk for llsync support on bt stack 
 porting from https://github.com/tencentyun/qcloud-iot-explorer-BLE-sdk-embedded-demo
+
+Now the llsync package support the feature:
+
+- support the rt-thread/bsp/nrf5x in nimble
+- support the rt-thread
+
+
+
+
+
+## (RT-THREAD)HOW TO USE IT
+
+git clone rt-thread master:
+
+```
+git clone https://github.com/RT-Thread/rt-thread.git
+```
+
+enter the bsp/nrf5x/nrf52832/ 
+
+```
+menuconfig
+```
+
+select this package in menuconfig
+
+![image-20220209221922853](doc/images/image-20220209221922853.png)
+
+this package must use the nimble bluetooth stack. 
+
+then use the command download the package
+
+```
+pkgs --update
+```
+
+then build the mdk5 project
+
+```
+scons --target=mdk5
+```
+
+then build burn it with keil project
+
+enter the shell
+
+the cmd ble_services_add , will start the ble sample
+
+```
+
+msh >ble_services_add
+[I/nimble] GAP procedure initiated: stop advertising.
+[I/nimble] GAP procedure initiated: stop advertising.
+[I/nimble] ===ble_advertising_stop==197=====
+[I/nimble] GAP procedure initiated: advertise; disc_mode=2 adv_channel_map=0 own_addr_type=0 adv_filter_policy=0 adv_itvl_min=0 adv_itvl_max=0
+qiot info: start wait advertising
+msh >[I/nimble] connection established; status=0, handle:1
+[I/nimble] subscribe event; cur_notify=1
+ value handle; val_handle=7
+[I/nimble] ===gatt_svr_chr_access_q_device_info==58====
+[I/nimble] ===ble_send_notify==204==len:14==notify_conn_handle:1=
+[I/nimble] GATT procedure initiated: notify; att_handle=7
+[I/nimble] ===ble_send_notify==204==len:9==notify_conn_handle:1=
+[I/nimble] GATT procedure initiated: notify; att_handle=7
+[I/nimble] ===gatt_svr_chr_access_q_device_info==58====
+[I/nimble] subscribe event; cur_notify=0
+ value handle; val_handle=7
+[I/nimble] disconnect; reason=531
+
+```
+
+then , use the wechat (lianlian ) to config the ble device
+
+you can control the led light with your wechat.