11-25-2016, 02:37 AM
Ahhh after fiddling few more nights with this i can tell you that i was wrong with this assumption that heat is dissipated via the leads. It simply shows my total lack of understanding of heat vs temperature 
Simply put - if the device is consuming 60 mW (e.g. 5v x 12mA) this will impact the temperature reading in a radius of 7-8 cm (e.g. +3 degrees if <3 cm, +1 degree ~5 cm, etc...
20mW (5v x 4 mA) results in +0.5 deg @4cm.
Somehow putting plastic, foam etc, does not really change it for some reason
In fact putting the sensor out should help to reduce the heat impact, but you need to put it in a direction opposite to the ESP and CO2 sensor.
And also if during this time you have connected via the Chrome Config tool - the device will not go to sleep - so better use some other serial monitor if you want to watch the output (i will add a feature to enable sleep in the upcomming update of the tool)
Simply put - if the device is consuming 60 mW (e.g. 5v x 12mA) this will impact the temperature reading in a radius of 7-8 cm (e.g. +3 degrees if <3 cm, +1 degree ~5 cm, etc...
20mW (5v x 4 mA) results in +0.5 deg @4cm.
Somehow putting plastic, foam etc, does not really change it for some reason
In fact putting the sensor out should help to reduce the heat impact, but you need to put it in a direction opposite to the ESP and CO2 sensor.
And also if during this time you have connected via the Chrome Config tool - the device will not go to sleep - so better use some other serial monitor if you want to watch the output (i will add a feature to enable sleep in the upcomming update of the tool)