Hi all, I tried this sample using both M5stickc and M5stickcplus devices. : Hand washing timer with water sound detector. Both devices work fine. But noticed that the M5stickc is much more superior in terms of microphone sensitivity. Same exact code. Only changed include files: #include <M5StickC.h> or #include <M5StickCPlus.h>. Take a look at the graphs of sensitivity (predictions) from both the devices in the same exact place/environment. Disappointed since M5Stickc is in a EOL status :(. If anyone has any thoughts please share. Thanks.