Pool Math (Trouble Free Pool) for Home Assistant (Marketplace integration)

Installs: 59 sharing analytics
GitHub stars: 45
Connection: Uses the vendor's cloud
Upkeep: No update in 6 to 18 months
Version: v2.2.0, March 17, 2026
Category: Water, Pools and spas
Kind: Marketplace integration
Needs: Needs the Marketplace (HACS on 2026.10 and older)
Domain: poolmath
Source: github.com/rsnodgrass/hass-poolmath
Issues: Report an issue

Independent directory, made by the developer of Vulpo. Not affiliated with Home Assistant or the Open Home Foundation.

Screenshots From the README of rsnodgrass/hass-poolmath.

About

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.

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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.

Provides

Sensors

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

SensorsFree Chlorine, Combined Chlorine, Total Chlorine, pH, Total Alkalinity, Calcium Hardness, Cyanuric Acid, Salt, Borate, Calcite Saturation Index, Temperature, Water Temperature, and 3 more

Troubleshooting

DiagnosticsDownloads a diagnostics file to attach to a bug report.
Repair noticesNotices it can show in Settings, Repairs:Pool Math: Configuration Update Required