Installation Guide

Before proceeding, ensure you have installed the necessary drivers for the Wemos D1 to communicate with your PC or laptop. Refer to the troubleshooting page for details.

Connect the S0tool to your PC or laptop using a USB cable that supports both power and data transfer. Use the button below to install the S0tool firmware directly to your device via USB from your browser.

Installation

Follow these steps to install the firmware on your S0tool:

  1. Click the blue connect button below; a pop-up window will appear with a list of available USB devices.
  2. Plug the USB cable into the ESP and connect it to your computer.
  3. Select the USB serial port and click Connect.
  4. Choose Install S0tool, then click Install.
  5. If the installation fails, hold down the boot button and try again.
  6. Once completed, click Next.

After installation, connect the S0tool to your Wi-Fi network:

  1. Select your network from the list and enter your 2.4 GHz Wi-Fi credentials.
  2. Click Connect.

Congratulations 🎉 The S0tool is now connected to your network!

Standard Configurations

S0tool Standard
S0tool Standard

Standard with watermeter (NPN) and kWh meter (50-100ms).

S0tool Watermeter
S0tool Watermeter

Configuration for watermeter (NPN).

S0tool kWh Meter
S0tool kWh Meter

Configuration for kWh meter with 50-100ms impulses.

Connect to Home Assistant

Option 1: During Firmware Installation

After setting up your Wi-Fi, you will see an option to add the S0tool to Home Assistant. Follow the link to configure it.

Option 2: Auto Discovery

If your Home Assistant instance is on the same network, the S0tool will be automatically discovered under Settings > Devices & Services.