If the 2-minute report doesn’t successfully send, there should be two lines of serial output:
- “Failed” with a number representing the milliseconds between the send attempt, and when a failure to send was determined
- “Error” with a negative number indicating the error
This is currently only reflected in serial output, and not in the locally served JSON data. Other fields in JSON do exist which can indicate failures to send, such as httpsuccess, httpsends, and the status indicators.