Implementations described herein provide a method for calibrating a temperature of a substrate support assembly which enables discrete tuning of the temperature profile of a substrate support assembly. In one embodiment, a system, comprises a memory, wherein the memory includes an application program configured to perform an operation on a substrate support assembly, a control board disposed in a substrate support assembly, wherein the control board comprises a processor having an wireless interface, a pulse width modification (PWM) heater controller, wherein the processor is connected with the memory to read and access the application program from the memory when in operation, and a heating element coupled to the pulse width modification (PWM) heater controller, wherein the heating element comprises a plurality of spatially tunable heaters that are individually tunable by the pulse width modification (PWM) heater controller.