Initial solution found: There are two board managers available. https://github.com/espressif/arduino-esp32 in the Arduino IDE as ESP32 by Espressif systems. The Arduino board manager in the Arduino IDE as Arduino ESP32 boards by Arduino. The latest version from Espressif Systems is V3.0.4 : This did...

Arduino IDE 1.8.19 or 2.3.2 MegunoLink@1.42 MPL version 1.37.24.151.530 I compiled the ESP32 example sketch BlinkRGB.ino using ESP32 board definitions. This compiled OK. I then added : #include <MegunoLink.h> but no additional code. The compiler returns (repeat info removed): In file included from ....

Thanks Phil, I looked at parsing the serial response. This works with the Arduino Serial.parseInt() command: Turtle.GetValue(F("numTurtles"), F("Value")); // value of selected item nn = Serial.parseInt(); The integer value returned in the variable nn. I've never had a reason to d...

Goal: read the UI NumericUpDown values to initialise the variables in Arduino Code The NumericUpDown buttons allow an initial value to be set. The Properties:Communications allow a serial command to be sent, that sets a variable value on the Arduino. When the mouse is used to change the UI value, th...