I was google for this problem and found this topic… It seems this function is still buggy. I was set to start the first valve at sunrise but somehow it handles fixed 6:02 time as sunrise. If I check the weather forecast page of Opensprinkler, it shows the sunrise is at 6:02 today, and tmorrow 6:44, a day after 6:46 and 6:47… It was the same yesterday, the today showed 6:02 but the following days were correct. I was waiting a day to see if this get’s back to normal by the next day, but it seems stucked.
App version: 1.7.1
Firmware version: 2.1.7
Hardware version 2.3 DC
Waiting for your ideas / instructions.