I would like to monitor the temperature outside my home. The sensor has to be located at least 20m cable length from the display unit. Whole system should be powered by a battery (doesn't matter which) and should have a decent display.
I would like to have an accuracy of <=0.5°C but it's ok if it's not as good. I would like to create a display unit myself (as fun project). But it's also OK if there is an off-the-shelf component.
All components should be obtainable from cheap online shops from china and should be cheap.
Which sensor should I select? Digital? Analog?
How much resistance is acceptable per 'm of the cable?
Can arduino nano handle displaying part? Would it be possible to log temperatures using arduino?
I've never done anything like this, I've tried a little research, but I know there are people here who can answer this without to much effort. Great, thanks a lot.
Still remains question of cable type/dimension.