Even if "once" were initialized correctly, you're still going to have problems with it because you've declared it twice. It is declared globally, and declared in the loop() function. I think you should remove the one in loop().
Pete
Even if "once" were initialized correctly, you're still going to have problems with it because you've declared it twice. It is declared globally, and declared in the loop() function. I think you should remove the one in loop().
Pete