Update notebooks/xinyang/README.md

notebooks/xinyang/README.md

@@ -106,18 +106,29 @@ Today, we participated in the Pressure Data Acquisition subsystem verification b
 ![](cup_weight.jpg)
 ![](Linear_table.png)   
   
-According to the linear regression model, the model has mean square error of 13.88 and regression p_value of 0.00083 which is considered statistically significant for the model to be considered linear.  
+### According to the linear regression model, the model has mean square error of 13.88 and regression p_value of 0.00083 which is considered statistically significant for the model to be considered linear.  
 
 ![](linear_regression.png)  
   
 
-I verified microcontroller functionality by writing a code to scan WIFI, which returned satisfying result.
+### I verified microcontroller functionality by writing a code to scan WIFI, which returned satisfying result.
 ![](WIFI_scan.png) 
 
-I also participated in the Bluetooth Data Transfer subsystem and User Interface subsystem to establish bluetooth connection. Bluetooth Data Transfer subsystem can also be enabled and connect to a third party application. My next step will be to continue to work on the bluetooth module and verify data flow acquired by the sensor can be transmitted to our frontend application. I will also need to build a frontend script that handles the input and convert data into a plot. The last thing needed to do is to build a Data Storage subsystem that can store the data when bluetooth function is disabled.  
+### I also participated in the Bluetooth Data Transfer subsystem and User Interface subsystem to establish bluetooth connection. 
+Bluetooth Data Transfer subsystem can also be enabled and connect to a third party application. My next step will be to continue to work on the bluetooth module and verify data flow acquired by the sensor can be transmitted to our frontend application. I will also need to build a frontend script that handles the input and convert data into a plot. The last thing needed to do is to build a Data Storage subsystem that can store the data when bluetooth function is disabled.  
 ![](nRF.png) 
 
+# 2022/4/5
 
+Today I worked on finiding a good bluetooth low engery library for Andorid Studio frontend development. I decided to go with this one as it has minimal functionality and it's good for tesing and remodifying.
+
+https://github.com/ederdoski/SimpleBle
+
+# 2022/4/7
+
+The above repository is not suited to continue to work on so I decided to use this source instead for frontend development.
+
+https://github.com/Jasonchenlijian/FastBle