HydroFloat

Piezoelectric Submersible Level Sensor using ESP32 X4 Relay board.

Similar to the FloatLevel project but does not have MQTT, Modbus. Wifi runs in AP mode only.

Relays are triggered at configurable water levels

This project is based on the ESP32, it works with a Submersible Level Sensor 4-20ma Pressure Sensors.

ESP32 X4 Relay Board
Piezoelectric Submersible 4-20mA Level Sensor

Wiring

Device Pin	ESP32
FloatLevel red	24VDC
Use 135Ω (2 X 270Ω in parallel) from A0 to GND
FloatLevel black	A0

Used the following development tools;

• Visual Studio Code with the PlatformIO extension.
• Access Point is HydroFloat, use the default 12345678 as the AP password. Browse 192.168.4.1 and go to Configuration Page to set the levels.

License

 Copyright (c) 2025. ClassicDIY

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.