WOW is obviously blocking uploads per site made less than five minutes apart. They do not state this in their docs they only suggest in their faq that five minutes is the recommended upload frequency for aws. So why not decrease the upload frequency to 10 minutes, or hourly if you can calculate the mean over the past hour. It sounds like your aws is configured to dump output at specified frequency.
- Does it dump a new csv each time?
- Does the csv only have one line?
- Does your AWS let you choose whether to dump time averaged or instantaneous values?
- Why are you not parsing dateutc from the fields in the csv?
- Are you using their TEST site protocol? You should not be submitting real data until you have confidence you are doing the right thing. Unless you know you can manually delete the bad data after the fact.