Northof49:
Invalid conversion from int to const char is what it says, and highlights that line.
The error is in the following section:
void joystickJoystickMoveRightCallback(int value) {
/* Start your code (joystickJoystickMoveRightCallback) */
steerServoPos = map(atoi(value), 0, 1023, 90, 180);
/* End your code */
}
you're calling atoi on a value that is already defined as an integer. Hence the error.
Hope this helps,
Brad
KF7FER