Since, I could not go further with the canvas type of chart, I searched in the forums to find a better way of plotting the data. One thing, I realized is that I can use the chartmaker extension with CSV data. I tried the example from the below link and I was able to get the app working with the given data.
https://community.appinventor.mit.edu/t/cant-select-ble-component-from-list/4818
It worked well. Now, my question is, since my data is time series data, How can I plot time data on x-axis. For example, I want to plot time (minutes) vs Values. Can someone help me how to convert my data, specially time data into minutes. My current data looks like the following
Feb 24, 2020,9:37:46 pm,V259,R255
Feb 24, 2020,9:37:46 pm,V263,R255
Feb 24, 2020,9:37:50 pm,V268,R255
Feb 24, 2020,9:37:50 pm,V266,R254
Feb 24, 2020,9:37:55 pm,V247,R256
Feb 24, 2020,9:37:55 pm,V260,R255
Feb 24, 2020,9:37:57 pm,V260,R256
Feb 24, 2020,9:38:01 pm,V257,R256