To give more details about my IFTTT experience with Netro :

As you can see by reading the IFTTT log, I asked to water at 6:07 and the start watering event came at 6:42. I asked to stop watering at 6:13 and it was triggered at 7:10, almost one hour after.

Best regards,

Christophe

If starting with a redlight it could be a low battery issue. My whisperer stopped working at 16% charge. I then had a chance the sun came back for a couple of hours for getting 41% and then work again.