I was wondering if you could incorporate VPD in your programming. I mean truly use it in the calculations.
Currently, if you input a VPD and a temp or RH the program will calculate a corresponding RH or temp and locks it into that point. When the daytime setting engages the heater engages and the temp rapidly rises until the heat from the lights over powers everything and we go into cooling mode. From there it is a battle to keep it at that point.
What would be ideal is to input a VPD and a range of temp &/or RH. This way when the morning comes the Niwa controller will gently push the temp/RH into the range and keep it there. Later in the day if conditions warrant (ie there is a heat dome) the system will kick in to maintain the VPD at the upper range.