---
title: "Pool Math (Trouble Free Pool)"
description: "Pool Math (Trouble Free Pool) is a Marketplace integration for Home Assistant. It has 59 installs sharing analytics, needs the vendor's cloud and was last updated March 17, 2026."
canonical: "https://vulpo.app/integrations/marketplace/rsnodgrass-hass-poolmath"
url: "https://vulpo.app/integrations/marketplace/rsnodgrass-hass-poolmath.md"
last-updated: "2026-10-22"
version: "1.4"
---

# Pool Math (Trouble Free Pool)

> Pool Math (Trouble Free Pool) is a Marketplace integration for Home Assistant. It has 59 installs sharing analytics, needs the vendor's cloud and was last updated March 17, 2026.

Pool Math (Trouble Free Pool) is an integration that brings Pool Math data for a swimming pool into Home Assistant. It reads from the vendor's cloud, so it needs internet access, and it is set up in the UI with a Pool Math Share URL, a display name, chemistry guidelines and an update frequency. It provides sensors for free, combined and total chlorine, pH, total alkalinity, calcium hardness, cyanuric acid, salt, borate, calcite saturation index and water temperature, plus binary sensors. The same settings can be changed later in the options, where the share URL is optional. A repair notice titled Configuration Update Required can appear in Settings under Repairs, and a diagnostics file can be downloaded for bug reports.

Automatic summary of the code of rsnodgrass/hass-poolmath. Something wrong, or are you the maintainer and want your own text here? [Get in touch](https://vulpo.app/contact)

[Open in My Home Assistant](https://my.home-assistant.io/redirect/hacs_repository/?owner=rsnodgrass&repository=hass-poolmath&category=integration)

On Home Assistant 2026.11 or newer? [Open it in the Marketplace](https://my.home-assistant.io/redirect/marketplace_repository/?owner=rsnodgrass&repository=hass-poolmath&category=integration)

## Supports

- **Uses the vendor's cloud**: Needs an internet connection and an account with the vendor.
- **From the Marketplace**: Installed through the Marketplace, formerly HACS.

## Setting it up

Install it from the Marketplace and restart Home Assistant, then add it under Settings, Devices and services.

### Connect

- **Pool Math Share URL**
- **Display name**
- **Chemistry guidelines**
- **Update frequency**

### After setup

- **Pool Math Share URL (optional)**
- **Display name**
- **Chemistry guidelines**
- **Update frequency**

## Entities

- **Sensors**: Free Chlorine, Combined Chlorine, Total Chlorine, pH, Total Alkalinity, Calcium Hardness, Cyanuric Acid, Salt, Borate, Calcite Saturation Index, Temperature, Water Temperature, and 3 more

## Troubleshooting

- **Diagnostics**: Downloads a diagnostics file to attach to a bug report.
- **Repair notices**: Notices it can show in Settings, Repairs:
  Pool Math: Configuration Update Required

## At a glance

- Kind: Marketplace integration
- Category: [Water](https://vulpo.app/integrations/category/water.md), Pools and spas
- Number: 59 installs sharing analytics; 45 GitHub stars
- Connection: Needs the vendor's cloud
- Upkeep: No update in 6 to 18 months
- Needs: Needs the Marketplace (HACS on 2026.10 and older)
- Latest version: v2.2.0, last updated March 17, 2026
- Domain: `poolmath`
- Source: <https://github.com/rsnodgrass/hass-poolmath>
- Issues: <https://github.com/rsnodgrass/hass-poolmath/issues>
- Screenshot: https://vulpo.app/integrations-img/50a88f1ed0bf916c.webp (from rsnodgrass/hass-poolmath's README)
- Screenshot: https://vulpo.app/integrations-img/24888c1877630b5a.webp (from rsnodgrass/hass-poolmath's README)

In Vulpo: Chart card, Apple Watch

Independent directory, made by the developer of Vulpo. Not affiliated with Home Assistant or the Open Home Foundation. [About these numbers](https://vulpo.app/integrations/about)

Last updated 2026-10-22. Source: https://vulpo.app/integrations/marketplace/rsnodgrass-hass-poolmath

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