Update notebooks/xinyang/README.md

notebooks/xinyang/README.md

@@ -95,9 +95,13 @@ Today, we participated in the Pressure Data Acquisition subsystem verification b
 ![](linear_regression.png)  
   
 
+# 2022/4/3  
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 ### I verified microcontroller functionality by writing a code to scan WIFI, which returned satisfying result.
 ![](WIFI_scan.png) 
 
+# 2022/4/4
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 ### 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) 
@@ -114,7 +118,7 @@ The above repository is not suited to continue to work on so I decided to use th
 
 https://github.com/Jasonchenlijian/FastBle
 
-# 2022/4/14
+# 2022/4/10
 
 Today I continue to work on bluetooth connection on Micro-controller. I found this tutorial very helpful.
 
@@ -124,7 +128,9 @@ I also worked on how to make multiple characteristics and it has some problems n
 
 https://www.uuidgenerator.net/  
 
-I also worked on transferring my work space from arduino IDE to platform IO on visual Studio code to speed things up.
+# 2022/4/14
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+I worked on transferring my work space from arduino IDE to platform IO on visual Studio code to speed things up.
 
 https://platformio.org/?utm_source=platformio&utm_medium=piohome
 
@@ -132,4 +138,36 @@ I have an issue of not detecting usb to uart port which leads to me not able to
 
 # 2022/4/16
 
-Today I modified my bluetooth code and now it reads in voltage values from 6 different pins and set the values in 
+Today I modified my bluetooth code and now it reads in voltage values from 6 different pins and set the values in each channels. The current problem right now is that microcontroller reads in 12 bit integer and and BLE protocol accepts string(array) or 8bit integer. We have to scale down based on our results in signal processing. Our current method is right shift 4 bits but the signal we are getting is very unstable.
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+# 2022/4/17
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+Today I toucheed on the data storage subsystem and I decided to write four helper functions that recognizes the sd card connetion, writes data into buffer, writes buffer into file and create new file every time it is initialized. The reference I am using is this: https://randomnerdtutorials.com/esp32-data-logging-temperature-to-microsd-card/  
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+# 2022/4/19
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+In the mock demo, I am aware that our frontend development is behind schedule so this will be my main focus this week.
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+# 2022/4/20
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+Today I finalized the embedded code for our microcontroller.  https://gitlab.engr.illinois.edu/ece445-intellisole/intelisole/-/tree/main/code   
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+We are habing trouble uploading our code to the pcb circuit so Ritvik decided for me to upload the code to the devkit today and he will desolder the microcontroller on this devkit and resolder it onto our PCB. Because we are having trouble uploading code to pcb, we decided not to proceed with data storage subsytem since  ### 1 We have a functioning data transmission subsystem and it is not necessary for another data storage subsystem. ### 2 Without the functioning pcb, I cannot connect micro sd onto our circuit to test the functionlity.
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+# 2022/4/21
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+# 2022/4/22
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+# 2022/4/23
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+# 2022/4/24
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+Today is the last day before demo. We 
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+# 2022/4/22