There is an alternative 'Wire' library here which is supposed to avoid some of the issues with using I²C: https://github.com/stickbreaker/arduino-esp32/tree/master/libraries/Wire I don't know how that compares with the latest official Arduino ESP32 build. Capacitance within connecting cables can cau...

Yes, it's Arduino code but you shouldn't have any trouble reading it to understand what it does and why it does it. It does "filter" contact bounces. As it stands, it determines when there have been no contact bounces for at least 50ms.

I think you included an out of date version of your code; otherwise I would have expected a comma or two to show up on the display! Because the number of characters representing each value can vary, you need to print the integer and float values to the display, not the substrings. Also, because the ...

There's an example here . . . .
https://www.arduino.cc/en/Tutorial/Debounce
. . . . . but use internal resistor.

If you want to switch on/off the power to your ESP32 consider purchasing a push button switch with 'push on push off' action (sometimes called 'maintained or 'latching' action).

That's why in my first post I wrote "If you are certain there are always 2, 4 and 3 characters respectively" :) I assume client.print does not put spaces between sucessive values. I therefore suggest you insert commas (or some other character). In the code below, I make use of the fact that toInt() ...

Use toInt() . . . . , . String data = "1023-01289"; int h,p,t; void setup() { Serial.begin(115200); p = data.substring(0,4).toInt(); t = data.substring(4,8).toInt(); h = data.substring(8,10).toInt(); Serial.println(p); Serial.println(t); Serial.println(h); } toFloat() is also available if you need i...

If you are certain there are always 2, 4 and 3 characters respectively (even if the temperature is negative for example), simply use the substring function to extract the three readings as strings . . . . . String data = "humidity=89, airpressure=1023 and temperature=-05"; void setup() { Serial.begi...

Google translation of original post from Chinese: I can not find the ADC sampling rate in the manual information, in the forum to see the post said to be 6K Hz, this 6KHz is 12Bit sampling the maximum sample rate? What is the maximum sample rate for each bit sample? I am using the Arduino IDF. If I...

Very many thanks Paul,

That has resolved the issue.

I am getting an error when attempting to install the ESP32 IDF software onto a new PC. Archibald@DESKTOP-MEEDJIJ MINGW32 ~ $ mkdir -p ~/esp Archibald@DESKTOP-MEEDJIJ MINGW32 ~ $ cd ~/esp Archibald@DESKTOP-MEEDJIJ MINGW32 ~/esp $ git clone --recursive https://github.com/espressif/esp-idf.git Cloning ...