Hi Adie,

Two comments.
The accuracy of any timer at the 1/100th second level is difficult to assess. You would need a reference timer and connect the start and stop signal both to this timer and to the M5stack /ESP32 based on timer
Absence of a sytem clock. Actually there is one M5 Core 2, its RTC but it reports only seconds, minutes, hours, days.. On the other entry level Core models, there is none but you can add an RTC units that will provide the functionality
Csierra67

Hi Adie,

I don't think you are doing something wrong but there is not enough code to have a stopwatch
and as you say you need to link the code to system time. As you want to measure quite small durations, I would recommend you use the function "Get tick ms" that is available from the Timer section. You need to read the value at the start of your timing operation and again at the end.
By difference you get the duration. You then need to transform this duration in seconds, 1/10th and 1/100th
Once you are there, you need to define the start and stop, button pressed or detection by a sensor

The sensor works right away under UI Flow. I don't have any experience with it under C++

A workaround is to use Core or Core2 with Env III and UI Flow
No problem

I found it, on my installation, it is actually a submenu of the extreme right icon
Thanks again, you put me on tracks

Hi gavin67890

Thanks a lot for the reply !
However I am missing these snippets. Under Demo, I only have one submenu "Examples"
Did you do something special to install the snippets ?

There is at least one change. Env Sensor IV has been added.. But there may be other ones

Just downloaded this version. Up to 1.9.9 there used to be a summary of the features brought by the new version. Could we have it again ? Or is it published somewhere else ?

@mtylerjr Just tested the M5 demo example with my CO2 unit.. I don't have the L version, actually was not aware of its existence.
After a first run the sketch reported errors, the demo program uses Ubuntu font that does not exist on Core 2 UIFlow 1.12.3... I replaced all the labels fonts by default and yes the sensor works on Core 2

Hi there,

I am closing this topic. Actually the cause for these excessive variations was the 5V USB adapter I was using.