ESP32 WIFI Pentair Pool Controller

• Send MQTT commands to your pool to control

  • Pool pump
  • Spa
  • Lights
  • Features

• Easily integrated with HomeAssistant

• FreeRTOS based

• Includes Prometheus metrics on /metrics URL

Track your metrics with Prometheus and Grafana

Hardware

For this project, I used the following:

• ESP32-DevKitC which I bought from Amazon

• MAX485 Development Board also from Amazon

Wiring

Here's the wiring diagram:

MAX485 Input: A - Pentair RS485 B - Pentair RS485 DE - RE Jumper

ESP32 Pin	MAX485 Pin
5v	VCC
GND	GND
4	DE
16	R0
17	D1

Configuration

This project uses the esp32-wifi-manager to connect your ESP32 to your wifi network. Please see this project for details on connecting to wifi after flashing.

MQTT Server

This project relies on an MQTT server installed somewhere on your home network. There are several options available (I chose Mosquitto on my Synology NAS which works fine). Installation and configuration of the server will be up to you. The ESP32 will need user/password access on the same subnet.

After installing and configuring MQTT, you will need to add the required hostname/ip/user/password to the ESP32 code before flashing.

TODO: This will be improved by a options available via a HTTP page on the ESP32.

Home Assistant

Once you setup your MQTT server, you will need to configure Home Assistant to connect to your MQTT server.

The esp32-pentair-controller uses Home Assistant MQTT auto-discovery to populate the controls. They should appear automatically following the configuration and discovery process.

TODO

Configure MQTT server settings via web interface