Underfloor Water heating - Night lowering

[admin]

You can modify PID library compute function like this. Then you need to specify night_mode (boolean, true = night mode) and setpoint_night (float16 or similar) addresses in PID init. After that restart your script via enable/disable so new library and parameters are loaded.

Code:

function PID:compute()   local params, current, setpoint, deltasc, deltain, output   params = self.params   -- get input values   current = grp.getvalue(params.current)   setpoint = grp.getvalue(params.setpoint)   if params.night_mode and grp.getvalue(params.night_mode) then     setpoint = grp.getvalue(params.setpoint_night)   end   -- delta between setpoint and current   deltasc = setpoint - current   -- calculate new iterm   self.iterm = self.iterm + params.ki * self.deltatime * deltasc   self:clampiterm()   -- delta between current and previous value   deltain = current - self.previous   -- calculate output value   self.output = params.kp * deltasc + self.iterm   self.output = self.output - params.kd / self.deltatime * deltain   -- write to output   self:setoutput()   -- save previous value   self.previous = current   return self.output end