Product Overview

Home Assistant TDS1 (single channel) is a single-channel TDS water quality monitoring module from iSentrol (Sense and Control Technology). Built on the ESP32 platform, it uses one UART water probe to measure both TDS (total dissolved solids) and water temperature, and reports the data in real time over Wi-Fi to the built-in web console and to the Home Assistant smart-home platform. Simple to install and plug-and-play.

Key Features

• Single-channel monitoring: one UART probe, simple installation, plug-and-play.

• TDS + temperature: outputs both TDS (ppm) and water temperature (℃).

• Adjustable threshold alarm: TDS threshold is user-settable and saved across power loss; over-limit is auto-flagged as Warning.

• Wi-Fi wireless connection: view directly in the built-in web console, natively integrates with Home Assistant.

• Auto provisioning on disconnect: if Wi-Fi is lost, the device auto-opens a provisioning hotspot with guided phone setup.

• One-touch factory reset: long-press the BOOT button for 5 seconds to clear provisioning info — ideal for resale or migration.

Status LED

First Use & Provisioning

1. Connect the probe and power on via USB 5V.

2. On first power-on the D2 LED blinks fast; after about 1 minute the provisioning hotspot iSentrol HATDS1 Fallback opens automatically.

3. Connect your phone to this hotspot (no password); the provisioning page pops up, or visit http://192.168.4.1.

4. Select your 2.4 GHz Wi-Fi and enter the password; the device reboots and connects automatically after saving.

5. After provisioning succeeds the D2 LED switches to slow blink; the hostname on the router starts with isentrol-tds-single.

Note: only 2.4 GHz Wi-Fi is supported. To change networks, long-press the BOOT button for 5 seconds then release to factory reset (this also clears the set threshold), then re-provision.

Data & Functions

Data is viewable via the built-in web page (device IP, port 80) or Home Assistant; Home Assistant auto-discovers the device on the same LAN and supports custom automations (e.g. push notification on TDS over-limit).

Specifications

Precautions

1. The probe is for clean water only; do not measure corrosive liquids, and rinse with clean water and air-dry after use.

2. Keep the probe cable and connector dry; install the host away from splashing water in a ventilated, dry location.

3. TDS value is not a substitute for professional water testing and must not be the sole basis for drinking-water safety.

4. Use a qualified 5V USB power supply, operate at 0–50 ℃, and avoid condensation and direct sunlight.