Target is to use Lime2 as a "virtual temperature measurement" instead of real NTC to fool a heat pump. how to get analog output to Lime2 or other ideas how to make a virtual NTC?
There is no true DAC (aka analog output) on Allwinner A20 chip, the only DAC is related to the audio but not sure if you can use it for task you want. I guess you need DAC for that task.