How to use custom timestamps in custom inputs

I want to log some statistical data with the timestamp of yesterday.
So I created a custom input, which runs short after midnight, to read the data and log as some hours ago.
I tried:

import datetime
tstamp = - datetime.timedelta(hours=4)
self.value_set(0, val, timestamp=tstamp)
self.value_set(1, val, tstamp)

but the values are still logged with the current time.
What am I doing wrong?

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Timestamps are stored in UTC, so try datetime.datetime.utcnow()

Unfortunately there is no change.
Found this while debugging

2022-04-06 21:37:54,013 - DEBUG - mycodo.controllers.controller_input_db38c8c5 - Adding measurements to InfluxDB with ID db38c8c5-8df1-4f21-8ec9-d243e69fd614: {0: {'measurement': 'energy', 'unit': 'kWh', 'value': 1.26, 'timestamp_utc': None}, 1: {'me...

based on the definition of value_set()

 def value_set(self, chan, value, timestamp=None):
        if timestamp:
            self.return_dict[chan]['timestamp_utc'] = timestamp
            self.return_dict[chan]['timestamp_utc'] = datetime.datetime.utcnow()

the timestamp_utc should at least be the UTC timestamp but not “None”
Seams the information is lost somewhere in between.

I think I figured out the issue and committed a fix.

Upgrade to master and see if the issue is resolved. You will need to have in INPUT_INFORMATION the following key/value pair to indicate not to set all measurements to the same timestamp:

'measurements_use_same_timestamp': False

Hey Kyle,
this works as expected.
Thank you for your fast support.

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