Which timestamp(s) is/are correct?

[SumDum]

Hi,

I have Domoticz logging a number of temperatures from 1-wire sensors using an I2C interface. In the local logs the timestamps are always on the 5 minute, near enough:

Code: Select all

2022-03-12 17:10:00	67.6
2022-03-12 17:15:00	67.6
2022-03-12 17:20:00	67.5
2022-03-12 17:25:00	67.4

The sensors are also being sent to MQTT for a bit of tag adjustment before onward logging to influx. The MQTT timestamps match the LastUpdate field in the JSON:

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{
	"Battery" : 255,
	"LastUpdate" : "2022-03-12 17:28:19",
	"RSSI" : 12,
	"description" : "",
	"dtype" : "Temp",
	"hwid" : "2",
	"id" : "AA07",
	"idx" : 5,
	"name" : "TankTop",
	"nvalue" : 0,
	"stype" : "LaCrosse TX3",
	"svalue1" : "67.4",
	"unit" : 7
}
{
	"Battery" : 255,
	"LastUpdate" : "2022-03-12 17:23:14",
	"RSSI" : 12,
	"description" : "",
	"dtype" : "Temp",
	"hwid" : "2",
	"id" : "AA07",
	"idx" : 5,
	"name" : "TankTop",
	"nvalue" : 0,
	"stype" : "LaCrosse TX3",
	"svalue1" : "67.5",
	"unit" : 7
}
{
	"Battery" : 255,
	"LastUpdate" : "2022-03-12 17:18:09",
	"RSSI" : 12,
	"description" : "",
	"dtype" : "Temp",
	"hwid" : "2",
	"id" : "AA07",
	"idx" : 5,
	"name" : "TankTop",
	"nvalue" : 0,
	"stype" : "LaCrosse TX3",
	"svalue1" : "67.6",
	"unit" : 7
}
{
	"Battery" : 255,
	"LastUpdate" : "2022-03-12 17:13:04",
	"RSSI" : 12,
	"description" : "",
	"dtype" : "Temp",
	"hwid" : "2",
	"id" : "AA07",
	"idx" : 5,
	"name" : "TankTop",
	"nvalue" : 0,
	"stype" : "LaCrosse TX3",
	"svalue1" : "67.6",
	"unit" : 7
}

I'm guessing the internal log time is correct as that exists without the MQTT push. Readings are taken on the 5 minute.
But is the MQTT task resampling the sensors? Or is it delayed logging of the previously captured data? That would mean the timestamps are only relevant to the MQTT publish and not the data capture.

Thanks
SumDum