End while loop by pressing button

[PeteKnight]

Read this about while loops…

Exiting a "WHILE" loop from a Blynk Button Push

while loops can be very useful, but are generally best avoided when using Blynk. The reason for this is that code execution is limited to that while loop until the condition you specify becomes true, and this (a) prevents the void loop from executing and (b) prevents the BLYNK_WRITE callbacks from executing. You can overcome the effect of (a) by adding Blynk.run to your while loop, but that isn’t the real solution. Personally, I’d have a for loop that did the “buzz-buzz-buzz” bit by repeating …

Pete.