Use a simple EnergyPlus EMS Program

You'll need:

1. A sensor that reads the outdoor air temperature
2. A sensor that reads the zone mean air temperature
3. An actuator that controls the cooling temperature setpoint schedule
4. An actuator that controls the heating temperature setpoint schedule
5. A program control object, probably set to run

6. A program object that reads the two sensors and modifies the setpoint schedule via actuator

```

 
EnergyManagementSystem:Sensor,
   OutdoorTempC,                      !- Name
   Site,          !- Output:Variable or Output:Meter Index Key Name
   Site Outdoor Air Drybulb Temperature;  !- Output:Variable or Output:Meter Name     
 
EnergyManagementSystem:Sensor,
   ZoneTempC,                      !- Name
   My_Zone_Name,          !- Output:Variable or Output:Meter Index Key Name
   Zone Mean Air Temperature;  !- Output:Variable or Output:Meter Name

Name
 
EnergyManagementSystem:Actuator,
   HtgSetPtSchAct,           !- Name
   Heating_Schedule_Name,             !- Actuated Component Unique Name
   Schedule:Compact,       !- Actuated Component Type
   Schedule Value;          !- Actuated Component Control Type
 
EnergyManagementSystem:Actuator,
    ClgSetPtSchAct,           !- Name
    Cooling_Schedule_Name,             !- Actuated Component Unique Name
    Schedule:Compact,       !- Actuated Component Type

EnergyManagementSystem:Actuator,
  ClgSetPtSchAct,           !- Name
  Cooling_Schedule_Name,             !- Actuated Component Unique Name
  Schedule:Compact,       !- Actuated Component Type
   Schedule Value;          !- Actuated Component Control Type

Type
 
EnergyManagementSystem:ProgramCallingManager,
   ChangeSetpointsProgramManager,  !- Name
   BeginTimestepBeforePredictor,  !- EnergyPlus Model Calling Point
   ChangeSetpointsProgram;  !- Program Name 1

1
 
EnergyManagementSystem:Program,
   ChangeSetpointsProgram,  !- Name
   ...Logic goes here...
   SET HtgSetPtSchAct = whatever,
   SET ClgSetPtSchAct = whatever;