Here is a potential loop that you can use (with some changes here and there) -
a = arduino;
flag = true;
prevVal = 0;
count = 0;
while flag
val = readVoltage(a,'your pin number here');
if abs(val - prevVal) < eps % You can change the eps value to something reasonable based on what you see.
count = count + 1;
else
count = 0;
end
if count == 10
flag = false;
end
prevVal = val;
end
