Unit Tube Pressure Home Assistant Integration

Introduction

Unit Tube Pressure is a positive and negative pressure gauge that supports a wide measurement range from -100 ~ 200Kpa. During use, the device connects via a tube, with the other side linked to the gas measurement environment. The sensor proportionally maps -100 ~ 200Kpa to an output voltage of 0.1 ~ 3.1V. It comes with a full-coverage protective housing to ensure stable operation of the sensor, making it ideal for applications such as gas pressure detection in industrial equipment.

Preparation

• Home Assistant host
• Install and enable ESPHome Builder in Home Assistant

Step 1. Create New Device

• Click the green button in the lower right corner to create a device.

Step 2. Create Device Name

• Click CONTINUE.

• Click New Device Setup.

• Enter the name of the device and Click NEXT.

Step 3. Choose Device Type

• Click ESP32-S3.

• Click SKIP.

Step 4. Start Edit YAML File

• Click EDIT. We can customize device functionality through YAML files.

Device Setup

Sensor Configuration

The GPIO pin assignments here may vary depending on the main controller used. For example, when using AtomS3R as the main controller:

• Add the Sensor components

  - platform: adc
    pin: GPIO1
    id: adc_voltage
    attenuation: 11db
    update_interval: 100ms
    unit_of_measurement: "V"
    accuracy_decimals: 3
    filters:
      - multiply: 3.3

  - platform: template
    name: "Pressure"
    unit_of_measurement: "kPa"
    accuracy_decimals: 2
    update_interval: 100ms
    lambda: |-
      float K = 100.0;
      float B = 110.0;
      float voltage = id(adc_voltage).state;  
      float P = voltage * K - B;
      return P;

Firmware Build

• Click INSTALL again to flash and wait for it to complete.

• After making changes, click SAVE and INSTALL in the top-right corner, then choose Manual Download in the popup.

• After the firmware compilation is complete, click Download and select Factory format(Previously Modern)

Firmware Upload

• Connect the device to your host via a USB Type‑C cable. Open ESPHome Web and click CONNECT to connect to the device.

• Locate the corresponding serial port number

• Click INSTALL

• Select the previously compiled firmware to upload.

Home Assistant Integration

• Click Settings -> Device & services to check the device.

• We can find the corresponding device in the Discover section.

• After adding the device, the data will be displayed correctly.

• Finally, we add these entities to the Dashboard, and the following shows their display results.