I think this is because it's trying to query and getting nothing, after plugging in after a long time without data. Message in terminal:
REQUEST:
ImmutableMultiDict([])
range_h_form not a number
Received from browser: 2019-12-09 00:00, 2019-12-09 17:07, Etc/UTC, nan
2. From: 2019-12-09 00:00, to: 2019-12-09 17:07, timezone: Etc/UTC
I think this is because it's trying to query and getting nothing, after plugging in after a long time without data. Message in terminal:
```
REQUEST:
ImmutableMultiDict([])
range_h_form not a number
Received from browser: 2019-12-09 00:00, 2019-12-09 17:07, Etc/UTC, nan
2. From: 2019-12-09 00:00, to: 2019-12-09 17:07, timezone: Etc/UTC
```
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I think this is because it's trying to query and getting nothing, after plugging in after a long time without data. Message in terminal:
Although the data say it's been recording. Weird.
(Note that the logger is running all the time after startup, and Flask app is just the frontend.)
https://github.com/mattbk/pi-temp/blob/b1bbea435f6d4265de44dfe6842aa8cbde7a0f18/pi_temp.py#L184