Temperature Chart

It has been almost a month since the last devlog and I regret procrastinating over the summer. Before Stardance challenge ends, I will try my best to upload as many devlogs as possible.

Temperature Chart

I modified the temperature & humidity app from showing the raw values to graphs, which makes it more visually appealing and also interesting to look at the temperature trend.

Clock Settings

Now, you can long press the left hand on the clock screen and you can edit the time by every minute. I also added a year-month-day text at the top, so you can check what day it is right away.

Minor Bug Fix

As reported in an earlier devlog, there was a bug that the passive buzzer was making random noises after using tone() function, even though I called noTone() to stop the sound. I spent quite a good time troubleshooting it and it turns out that instead of relying on tone(), I had to manually set up PWM signals with LEDC (LED control). To make square waves, I set the duty cycle to 50% of the resolution (2048 in my case because I am using 12 bit resolution). The frequency is set at 131Hz, which corresponds to the note C3.