BoM

Bill of Materials

This is highly dependent on configuration and needs, but here is a list of the items that I used for my controller.

ESP

Relays

• 5 Solid State Relays - These can be controlled directly by the ESP's GPIO pins. 2 control the contactors for the pool pump, 1 controls the relay used for the actuator, 1 controls the relay for the heat pump, and 1 supplies power to the 24VAC transformer which powers the actuator.
• 2 DPDT Relays - I needed a SPDT relay for the actuator and a relay with dry contacts to turn the heat pump ON/OFF. I also wanted them to be DIN mount, these fit the bill nicely.
• 1 NO/NC Contactor - This controls the speed of the pump by supplying power to either the high input or the low input
• 1 2NO Contactor - This controls the power to the pump. When it is turned on, power flows out to the NO/NC contactor which then directs it to the appropriate input on the pump.

Sensors

• DS18B20

Misc Parts

• 2 AC Distribution Blocks - Used to distribute AC power to various components that require it.
• 2 RC Snubbers - Used to suppress voltage spikes and transients in electrical systems by absorbing energy discharged from inductive loads when a switch is turned off, preventing damage to sensitive components by limiting the rate of voltage change.